CASE 2712 Compact Tractor Service Repair Manual Instant Download

1
150-190, T90 2310, 2510 2712 Compact
Tractors Service Manual
9-77981 epr nted
2
THIS SAFETY ALERT SYMBOL INDICATES IMPORTANT
SAFETY MESSAGES IN THIS MANUAL. WHEN YOU SEE THIS
SYMBOL, CAREFULL Y READ THE MESSAGE THAT FOLLOWS
AND BE ALERT TO THE POSSIBILITY OF PERSONAL
INJURY OR DE H B
If Safety Decals on this machine use the words
Danger, Warning or Caution, which are defined as
follows G DANGER Indicates an immediate
hazardous situation which if not avoided, will
result in death or serious injury. The color
associated with Danger is RED. G WARNING
Indicates an potentially hazardous situation
which if not avoided, will result in serious
injury. The color associated with Warning is
ORANGE. G CAUTION Indicates an potentially
hazardous situation which if not avoided, may
result in minor or moderate injury. It may also
be used to alert against unsafe practices. The
color associated with Caution is YELLOW. If
Safety Decals on this machine are ISO two panel
Pictorial, decals are defined as follows
0 The first panel indicates the nature of the
hazard. 0 The second panel indicates the
appropriate avoidance of the hazard. 0 Background
color is YELLOW. 0
Prohibition symbols such as and
if used, are RED.
X
WA I IMPROPER OPERATION OF THIS MACHIN E CAN
CAUSE INJURY OR DEATH. BEFORE USING THIS MACHINE,
MAKE CERTAIN THAT EVERY OPERATOR 0 Is
instructed in safe and proper use of the
machine. 0 Reads and understands the Manual(s)
pertaining to the machine. G Reads and
understands ALL Safety Decals on the machine. G
Clears the area of other persons. G Learns and
practices safe use of machine controls in a safe,
clear area before operating this machine on a job
site. It is your responsibility to observe
pertinent laws and regulations and follow Case
Corporation instructions on machine operation and
maintenance.
2001 Case Corporation
Bur 0-00000 issued November, 1994
CASE and IH are registered trademarks of Case
Corporation
3
Service Manual 150-190 T90 Compact Tractors
2310, 2510 2712 Compact Tractors Rac 9-77981
4
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CASE ISO, 100 AND TOO COMPACT TRACTOR Table of
Contents
C-Specifications, Engine. .. ,
............ ... ....... . ...... 9-7776 1 F-
Electrical ........... , ....... ,
............. .. .. , . 9-77701 Wiring Diagram,
150- 190 .......... ...................... 9-7786
1 Wiring Diagram, T90. . . . . . . .. . , . . . .
. . . . . . . . . . . . . . . . . . . . 9-77891
M-Assemblies Contained in the Engine
Block ........ ..... .. II-FIUEL
SYSTEM N-Carburetor ...... ......................
........... 9-776 11 NN- Fuel Pumps ........... ,
...... .................... 9-77741
IV- I-5VDRAULIC SYSTEM A-Hom It
Corts.. ... . ........... . ......... ... B-Hydra
ulic Pump ............. .. , ............
........ D-Control Valve .........................
. ........ ...
9-7790 9-7762 1 9-77631
DD- Orbital Motor ................................
... .. 9-77641 V-STEERING
9-77661 9-77811
O-Steering System .... OFOron-t Axles . .
VI -T tANSMlSSlON
S- Transmission ...
9-7691
R e c . F o r m 9 - 7 7 9 8 1
6
COLT GO1O, Z CIO AND ZV12 COMFACT
TRACTORS Table of Contents il-ensiue
691462 691462 691462 691462 691462 691462
10-Spec if ications, 2310 and 2510-HH 100 .
. 10-Specifications,27 12- HH120
............................ 38,- Electrical
........ , ............................ 3-Wiring
Diagram ................. 2,4, 5,6,7 and 9
Assemblies Contained in the Engine Block .
........ 2C,arburetor ............................
. , .. ..... IV- f5VDRAU6IC SYSTEM A-How It
Works ........ .............. B-Hydraulic Pump .
.. . . . , . . . . . . . . . . . . . D-Control
Valve ...................... DD-Orbital Motor
........ .., ....
9-77901
9-77621
9-77631 9-77641
V-STEERING O-Steering System .....
........................ .... OrOron-t Axles
...... .............................
9-77661 9-77811
VI-TRANSMISSION
9-//691
ST-ransmission . .
R a c . F o r m 9 - 7 7 9 81 - 1
7
(No Transcript)
8
SECTION
SPECIFICATIONS FOR K 24J AND K 301 ENGINES
Rae. Form 9 - 7 7 76 1
9
Crankshaft Rod Journal Wldth --------------------
1.079- I .084 Inches CrankBhaft End Play
------------------------------ .003-.020 lnehes
Measured at Beartng Plate and Shim to Proper End
Play
CAMSI-tAFT Camshaft End Play ---------------------
---------- .005-.010 Inches
fi z41 EhtolhfE sFEcif lcATiohés
Type ------------------------- Koller, 1
Cylinder, 4 Stroke Cycle Air Coo1ed, "L Bead
Engtne Base 3.350 Incbes Stzoke
--------------------------------------------
2.880 Inches
Camshaft Pin Diameter --------------------------.4
980- . 4985 Tnches
Camßhaft Inside Diameter -----------------------
.4995-. 5015 lnches
Camsliaft Pin to Camshalt C learance
---------------.001-.0035 lnches Ptatoa
Dtep1acezoent ----------------------------- 23.9
Cubic lacbes
CaotshaTt Pin to Breaker Cam Clearance
----------- .001-.0025 Inche9
Coropress1ooRaUo----------------------------------
------- 6to
VALVE LIFTERS Valve Lifter Outslde Diameter in
Block ----------- .6232- .6237 Inchea
Coizip. at Cranktng Speed (Engine at
Operattng Temperature)---------------------------
110 to 120 PSl at Sea Level
Crsnkcase Vacuum(Engtne Runnlng) --- 5 to 10
mches Vacuum at Sea Level
Valve Lifter Bore in Block -----------------------
.6245-.6255 lnches
Valve Lifter to Block Clearance
-------------------.0008-.0023 Inches
Ignltion ------ --------------------- 12 Volt
Coil, Breaker Polnt
CYLINDER BORE DlAmeter of Cyltader Bore ßtd. A, B
------------ 3.2505-3.2545 Inches .010 OverstzBe
A, 10 --------------- 3.2605-3.2615 Inches
WLVES
lntake Valve Tappet Clearanee (Cold)
----------------.008-.010 tnches
.020 Orersise A, B 20 4.Z70ti-4.37 i s incnes
.030 Overslze A, B 30 ---------------
3.2808-3.28i 5 Incnes
Exhaust Valve Tappet Clearance (Cold)
--------------.017-.020 Inches
Cylinder Bore Muat Be Bored or Honed Oversize If
Taper or Out of Round
Exceeds -----------------------------------------
.005 Inches FlsTohf Ahfo FlsToN Flhl Dlemeter
of Std. Ptston at Bottom of skirt -------
3.2470-3.2480 Inehes
Apgle of Vatve Face - lntake and Exhaust
---------------- 44 Degrees
valve Lengtn - Intake and mhaust ---------------
4.572-4.582 lnehes Maa. Valve Face Runout -
Intake ----------------------- .0015 mehes
Dlameter of Std. Ptatoa at 7op of Shirt
---------- 3.2425-3.2535 \nches (Beaaured JuBt
Be1ow Ot1 Ring)
Maa. Valve Face Runout - Exhaust
---------------------- .003 Inches
Balve I-Iead Diazoeter - Intake
-------------------- t.370-1 .380 Inches Die
netsr of ßfd. Pt8ton at Top -------------------
3.218-3.ZZ0 Inches Valve Head Diameter - Exhaußt
------------------ 1.120-1.130 Inches
Platoa Pia --------------------------E'ull
E'toating Tyge, Retatnea la Place With Two
Retainer Rings.
Valve Stem Diameter - Intake --------------------
.3105-.3110 Inches
Platon Ptn Bore tu Ptston Std. -------------------
- .85t5- .8586 Inehes
Vat'ze Stezo Diaoteter - Ezhauat
------------------ .3090-.3095 Inches
Ptatoa Pto Dlazaeter Std. ------------------------
.8581-.8593 Iztchea .005 Overslse -------------
.8641-.8643 Inches
Intake Valve Stern to Guide Clearance
-------------- .001-.o025 Inches
Ezfiauat Valve Stem to Gutde Clearance
------------ .0025-.004 inches Platon m Length
------------------------------ 2.738-2.7 fi3
Inehes
VALVE SEATS ßeat Angle - Intake and Exhauat
------------------------- 4ß Degrees
Piton Pin Fit In Piaton (Seiect Ftt)
-------------- .0000-.0003 reiches
Ptdoa Plzt E'tt da Coanectto8 Rod
----------------- .o00ä-.o0o8 utches
Seat Runout - Intake and Exhauat
------------------- .002 Inches geat Width -
latake .031-.045 Inches Bsyg)yA-
Eghauei------------------------------.031-06BInche
s Ezbauat Seal loeezt Rep1aceable Xttetde
Diazaeter of Exhaust Ingert ------------- t
.2535-1.2545 tncbes
PISTON RINQS p pgpp _at_ - ----- - - - (2
Compresston-1 QJj)
1st(Top)Compresslon-Chrome, Taper Face. Reltef
Indicates Top Stdo Side Clearance --------------
.002-.004 mches
Wldth .083-.0t4 Inches
2iut Compression-Chrome, nellef Indicates Bottom
Side
Side Clearance ------------ .001â-.0035 Inches
Wtdth .083-.084 Inches
ord Oil Ring ------------------------------ Caat
w/ mQanner
Eahaum lnsert netght -----------------------------
.21s-.zzl lnehes
SJde Clearance --------------.001-.003
Incfies Wldth -------------------- .1880-.1870
Inches Ring End Gap - When Installed in Bore
-------------- .010-.0Z0 Inches
VAuV E G U I O US Valve Guide Length
---------------------------------- 2.125 Inches
Valve Gulde Outside Diameter --------------------.
6zs0-.sZs5 Inches
let Cosop. --------------- .0825-.0835
Inches AdLCosnp.---------------.08850B75IocAes 2é
d. Cooi Rab---------- .0235-.0SA5IocAes 3r OS
RaS--------------.0235-0Z45Rches 3rdO8IHng--------
--------.1Z4-135NcRes
Valve Gutde to Block (Press Flt)
------------------ .0005-.002 Inches
Valve Gutde Inside Diameter - Before Installing
----- .307-.308 Inches Ream Valve Guides After
Installing to ---------. 312- .313 Inches
CONNECTINO RODS Connecting Rod Length from Center
of Pin Hole To Center of Bearing Journal
-------------------- 5.560-5.562 Inches
VALVE SPRINQS
Spring Free Length 1.7s3 lnehes Sgrtog Pressure
When Coap. to 1. 469 In. (value C1oseA)--27 to 31
I.bs.
Ptstoa Pia Bote Dtaoteter in Rod
----------------- .8596-.8599 Inches
inside Dtameter of Rott Journal, std.
------------ 1.5005-1.5010 Inches Vaderstze
-------------- 1.480a-t .49I0 Inches
Bring Pressure When Comp. to 1.165 In. (Valve
Open) --- ß4 to 62 lbß.
Coectliig Rtxt to Crank Journal Clearanee
-------- .000ß-.0015 lnches
GOVERNOR
Coanecttog nod to crank End Play Clearanee
-------- .007-.01ß Inehes
Ooeezaoc fififiö ShaYt Outside Diazaeter
------------ .3735-.3740 Inches
Governor Gear Bore for Stub Skalt
----------------.3745-.3755 Inches
C'ri Af'4 ttSHA T Af'4 O BEAnH"4 OS Type Henri
Beartoga --------------------------------- Ball
Beartngs
8tub Shaft to Governor Gear Clearance
------------- .ooo5-.002 Inches
CFEAEBbaflRgdJOurnal-----------------------
1.4995-1.5000loches
Governor Spring Free Length With 2 Lbs. Pre-Load
-------Z.ßZ Incnes
Goeezaor Sprlag Extended to 2.88 laches
------------ 5.5to6.59OWdB
10
rvm w i mr wzm m or- mmi r-mm i ms o Type
----- ---------------------- KoMer, 1 Cylinder, 4
stroke Cycle, Air Cooled, L ltead Engine Bore
------------------------------------------------
3.380 Inehea Stroke ------------------------------
-----------------J.250lnches
Cazaskaft Pin Diameter --------------------------.
4980-.4985 Incheg
Piston Displacement ----------------------------
29.07 Cubic Inches Coozpreasion Ratio
----------------------------------------- 6 to
I Max. Comp. at Cranking Speed (Engine at
Operating Temperature) -------- t 10 to 120 psl
at Sea Level Crankcase Vacuum(Engine Running)- -
- 5 to 10 Incites Vacuum at Sea Level
Camshaft lnslde Diameter -----------------------
.4995-. 5015 Inches Camshaft Pin to Camshaft
Clearance ---------------.001-.0035 Inches
Camshaft Pin to Breaker Cam C learariee -------
---- .001-.0025 Inches
VALVE LIFTERS Valve Lifter Chitside Diameter In
Block ------------ .5232- .62 J7 tnches
ignition - -- --- - - - --- - -------------------1
2 Volt Coil, Breaker Points
CYL IN DE R BO RE Diameter oI Cylinder Bore
Std. A, B-------------3.3745-3. 3785 Inches .010
Oversiz e A, B 10 --------------- 3.3845-3.3855
Inches .020 Oversize A, B 20 ---------------
3.3945-3. 3955 inches .030 Oversise A, B 30
-------- ------- 3.4045- iL4055 Inches Cylinder
Bore Must Be Bored or Honed Oversise If Taper or
Out of Round Exceeds -----------------------------
------------- 005 Inches
Valve Lifter Bore In Block -----------------------
.6245- .6255 Inches Valve Lifter To Block
Clearance -------------------.ou8- .ooZJ incnea
VALVES Intake Valve Tappet Clearance (Cold)
----------------.008-.010 Inches Exhaust Valve
TaPpet Clearance (Cold' -- -- -- --------.017-
.020 Inches
PISTO N AN D PISTON PIN
Angle of Valve face - Intake and Exhaust - - -
--- --- - --- --- 44 Degrees
Diazoeter at Std. Piston at Top
------------------- 3.356-3.360 Inches
Valve Length - Intake and Exhaust - - - - - - - -
- - -- - --- 4. 57 2-4.58Z Inches
Diameter of Std. Piston at Top of Shirt (measured
Just Below Oh Ring ------------------ 3.369-3.
370 Inches Dlameter ot Std. Pieton at Bottom of
SRirt --------- 3.371 -3. 372 Inchea
Max. Valve Face Runout - Intake - -- - - - - - -
- - --- --- ------ .0015 Inches
Max. Valve Face Runout - Exhaust - - - - -
-----------------.003 Inches
Piston Pin --------------------------- Full
Floating Type Retained In Place With Two Retainer
Rings.
Valve Head Diameter - Intake --------- -------
--- 1.370- I . 380 inches
Valve Head Di ameter - Exhaust - -- --
------------- I.120-1.130 Inchea
P1aton Pin Bore In Pigton, Std.
------------------- .8752-. 8754 Inches
Valve Stem Diameter - Intake --------------------
.3105-.3110 Inches Valve Stem Diam eter - mhaust
------------------ .3080-.3095 Inches Intake
Valve Stem to Guide Clearance --------------
.001-.0025 Inches
Platon Pin Diameter Std. -------------------------
.8752- . 8754 Inches .005 Oversize
-------------------------- .8802- . 8804
Inches Piston Pin Length -------------------------
--- --- 2.735-2.7 50 Inches Ptston Pin Fit In
Piston ----------------------- One Thumb Push Fit
mhaust Valve Stem to Guide Clearance ------------
.0025-.004 Inches
Piston Pin Fit in Connecting Rod
------------------ .0003- .0008 Inches
VALVE SEATS Seat Angle - IntWe and Exhaust
------------------------- 45 Degrees Man. Seat
Runout Intake and Exhaust ---------------------.00
2 Inchea
PI STON RINGS Rings per Piston -------------------
---------(2 Compression-1 Oil) 1st(Top)Compression
-Chrome, Tapered Face. Relief Indicates Top
Side. Side Clearance -------------- .002- .004
mches Width --------------------------- .078
Inches 2nd - Compression -------- Chrome, Relief
Indicates Bottom Side Side Clearance
-------------- .002- .004 Inches Width
--------------------------- .07 8 tnches 3rd -
Oil Ring ------------------------------ Cast N,
Islander Side Clearance -------------- .001- .004
Inches Width -------------------------- .1870
tnches Ring md Gap When Installed In Bore
------------- --- .010-.020 Inches
Seat Width - Intake -----------------------------
-- .037-.045 Inches
Seat Wldth - mhaust ------------------------------
.031-.062 Inches Exhaust Seat lasect
----------------------------------- Replaceable
Outside Diameter of Exhaust Insert -------------
1.2535- I .2545 Inches Exhaust Inaect Meight
------------------------------.219-.221 Incbe8
VALVE GUID ES
Replacement Ring Width lgt U Orlp . - - - - - -
- - - - - - - - - - - OY Y - . OF g lflCHeS 2nd
C omp. -- - -- - -- --------- .077 - . 07 8
Inches 3rd Oil Rail -- - - -- -- -- --- - .0245-
. 024 5 Inches 3rd Oil Ring -- - - - -- ---------
.134 - . 135 Inches
Valve Guide Length -------.-----------------------
---- 2.125 Incbes Ya1ee Gutde C ttside Dtaoteter
--------------------.6260- .6265 loches Valve
Gutde to Block (Press Fft ) -----------------
.0005-.002 Inches Valve Guide Inside Diameter -
Before installing ----- .307-.308 inches neam
Valve Guides After Installing to
-----------.312-.313 Riches
GONN EGTGI N RO DS Coiuiecting Rod Length From S
enter of i'in Hole To Center of Bearing Journal
---------------------5.295-5. 297 Inches
Fiston Pin Hole Diameter In Rod - --- ---- - -
----- -- .S757- .S7i0 inches Inside Diameter of
Rod Journal, Std. ------------ 1.500 5-1.5010
Inches Undersize -------------- 1.4905-1. 4910
Inches
VALVE QPRINOS Spring Free Lerith ---- .
...--..-------------------1.193 Inches sprtng
Pressure When Comp. to 1.468 In. (Valve Closed)
-27 to 31 Lbs.
Connecting Rod To Crank Journal Clearance
--------------.0005-.0015 Connecting Rod To Crank
End Play Clearance -------- .007-.016 Inches
Spring Pressure When Comp. to 1.165 m. (Valve
Open --- S4 to fi2 Lbs.
CRAN KSHAFT AND BEARIN GS Type Main Bearings
--------------------------------- Ball
Bearings Crankshaft Rod Journal
------------------------ 1.499 5- i . such Incnes
GOVERwOR Governor Stub Shaft Outside Diameter
------------- .3735-.3740 Inches Governor Gear
Bore for Stub Shaft ----------------.3745-.3755
Inches
Crankshaft Rod Journal Width --------------------
1.079-1.084 Inches
Stub Shaft to Governor Gear Clearance
------------- .0005-.002 loches Governor Spring
Free Length with 2 Lb. Pre-Load -------- 2.62
Inches Governor Spring Extended to 2.88 Inches
------------ s.5to s.s mehes
Crankshaft End Play ------------------------------
.003-.020 Inches Measured at Bearing Plate and
Shim to Proper End Play.
CAMS I4AFT C ainshaft End Play -----------------
-- ------------ .005- . 010 inc hes
11
GENE RAL TORCUE G_at_ECI WIOATION TAR L.E CRevinecl E-Gàl USE THE FOLLOWING TOROUES WHEN SPECIAL TOROUES ARE NOT GIVEN NOTE I'hese values apply to fasteners as received from supplier, dry, or when lubricated with normal engine oil. They do not apply if special graphited or moly-disulphide greases or other extreme pressure lubricants are used. This applies to both UNF and UNC threads . GENE RAL TORCUE G_at_ECI WIOATION TAR L.E CRevinecl E-Gàl USE THE FOLLOWING TOROUES WHEN SPECIAL TOROUES ARE NOT GIVEN NOTE I'hese values apply to fasteners as received from supplier, dry, or when lubricated with normal engine oil. They do not apply if special graphited or moly-disulphide greases or other extreme pressure lubricants are used. This applies to both UNF and UNC threads . GENE RAL TORCUE G_at_ECI WIOATION TAR L.E CRevinecl E-Gàl USE THE FOLLOWING TOROUES WHEN SPECIAL TOROUES ARE NOT GIVEN NOTE I'hese values apply to fasteners as received from supplier, dry, or when lubricated with normal engine oil. They do not apply if special graphited or moly-disulphide greases or other extreme pressure lubricants are used. This applies to both UNF and UNC threads . GENE RAL TORCUE G_at_ECI WIOATION TAR L.E CRevinecl E-Gàl USE THE FOLLOWING TOROUES WHEN SPECIAL TOROUES ARE NOT GIVEN NOTE I'hese values apply to fasteners as received from supplier, dry, or when lubricated with normal engine oil. They do not apply if special graphited or moly-disulphide greases or other extreme pressure lubricants are used. This applies to both UNF and UNC threads . GENE RAL TORCUE G_at_ECI WIOATION TAR L.E CRevinecl E-Gàl USE THE FOLLOWING TOROUES WHEN SPECIAL TOROUES ARE NOT GIVEN NOTE I'hese values apply to fasteners as received from supplier, dry, or when lubricated with normal engine oil. They do not apply if special graphited or moly-disulphide greases or other extreme pressure lubricants are used. This applies to both UNF and UNC threads . GENE RAL TORCUE G_at_ECI WIOATION TAR L.E CRevinecl E-Gàl USE THE FOLLOWING TOROUES WHEN SPECIAL TOROUES ARE NOT GIVEN NOTE I'hese values apply to fasteners as received from supplier, dry, or when lubricated with normal engine oil. They do not apply if special graphited or moly-disulphide greases or other extreme pressure lubricants are used. This applies to both UNF and UNC threads . GENE RAL TORCUE G_at_ECI WIOATION TAR L.E CRevinecl E-Gàl USE THE FOLLOWING TOROUES WHEN SPECIAL TOROUES ARE NOT GIVEN NOTE I'hese values apply to fasteners as received from supplier, dry, or when lubricated with normal engine oil. They do not apply if special graphited or moly-disulphide greases or other extreme pressure lubricants are used. This applies to both UNF and UNC threads .
SAE Grode No. 5 5 8 8
Bolt heod identificotion morks os per grode Note Monufocturing Morks Will Vory - Torque Foot Pounds - Torque Foot Pounds Torque Foot Pounds Torque Foot Pounds
Bolt Size Min. Max. Min. Max. Min. Max.
1/4 1/4 9 11 12 15
5/16 5/16 15 18 24 28
3/8 3/8 35 40 45 50
7/16 7/16 54 óO 70 8O
1/2 1/2 80 90 11O 125
9/J6 9/J6 1JO 120 16O 180
5/8 5/8 150 1ó5 220 240
3/4 3/4 260 280 380 420
7/8 7/8 360 400 600 660
7/8 7/8 360 400 9oo iooo
1 1 540 óoo 9oo iooo
1-1/8 1-1/8 720 800 T28O 1440
1-1/4 1-1/4 JOOO 1100 J800 2OOO
1-3/8 1-3/8 1460 1680 2380 2720
1-1/2 1-1/2 1940 2200 31óO 35óO
Thick nuts must be us ed with Grode 8 bolts Thick nuts must be us ed with Grode 8 bolts Thick nuts must be us ed with Grode 8 bolts Thick nuts must be us ed with Grode 8 bolts Thick nuts must be us ed with Grode 8 bolts 31óO 35óO
GENE RAL ENGINE TOROUE GECIFICATION TALL.E) GENE RAL ENGINE TOROUE GECIFICATION TALL.E) GENE RAL ENGINE TOROUE GECIFICATION TALL.E) GENE RAL ENGINE TOROUE GECIFICATION TALL.E) GENE RAL ENGINE TOROUE GECIFICATION TALL.E)
Torque tnch Pounds Torque tnch Pounds Torque Foot Pound j Torque Foot Pound j
Threod Size UNC UNF UNC UNF
Bolt Size
/4 5/16 70 150 85 165 22 35 50 25
22 35 50 45 ZO
EECIAL ENGINE TORCTUE SP'ECI WICATIONS
Cylinder Head Bolts
---------------------- Torque to 33 Ft.
Lbs. , Loosen, Retorque to 35 Ft. Lbs .
Connecting Rod Bolt" ------- ----------- ---
---------- ------ ----- Torque to 25 Ft. Lbs
. Flywheel Nut ------------------------------
--------------- Torque to 100 Ft. Lbs. Spark
Plug ------------------------------------------
------ Torque to 27 Ft. Lbs . Lubricate With
Grease Upon Assembly NOTE. The J I Caoe Company
reserves the right to mke im- provomerits in
deaigri or changee in specifieations t any
tirrie wàthout incurring any obli gatlon to
irietall them on
12
SECTION
ELECTRICAL SYSTEM THE CHARGING CIRCUIT THE
STARTING CIRCUIT IGNITION SYSTEM
R o c . F o r m 9 - 7 7 70 1
g
13
INTRODUC TION ....................... .... . ..

• .. F - 2
• F 2 thru F 4
• F - 5 thru F6
• F - 7
• F -8
• F -8
• -9thru F- 10

BATTERIES ................-... . .. -
- - SOLENOID SWITCH AND STARTER-GENERATOR ......
R E GULATOR ...................... .
IGNITION TIMING .................... .
... IGNITION COIL AND CONDENSER ............
.. .

• .
• . ..

CONTACT POINTS AND COIL POLARITY
..................
SPARK PLUGS ..............................-..
F- 11 thru F - 14
INTRODUCTION Section F contains the
specifications and wiring diagrams necessary to
diagnose and make minor adjustments on the
electrical components on the garden tractors, All
major adjustments and overhaul of electrical
components should be performed by an Authorized
Electrical Service Station (Delco-United Motors
Service) where specialized equip- ment and
trained personnel are available. DO NOT ATTEMPT
EVEN MINOR E LE CTRICA L ADJUSTMENTS WITHOUT
THE AID OF PROPER TEST EQUIPMENT ATTERV SERVICE
AbJD INSFEOTION I fZJJk Working with storage
batteries all exposed metal surfaces are live.
Never lay a metal object on top of a battery as a
short circuit may result. Sparks or open flame
must be kept away from batteries due to the
presence of explosive gas in and around the
batteries while they are being charged or in
use. The iulfuric acid or electrolyte present
in a battery is very harmful to your eyes , skin
and clothing. If contact is made with it, wash it
with a weak solution JI baking Soda and water.
This will neutralize the acid. Visual
Inspecticsn Check the battery terminals and
cables for dirty or corroded conditions which
will cause higJq resistance, resulting in under
charged batteries and very poor cranking
speed. The battery tray, holdown terminals and
cable ends must be cleaned when contaminated,
use baking soda and water. This will help to
prevent self discharge of batteries . After
cleaning and drying , a thin coating of
vaseline, light cup gre ass or paint will help
prevent contamination. A cracked or leaking
battery case will let the electrolyte leak out
and cause damage to the equipment, a battery in
this condition should be replaced. When just the
top sealing compound is leaking the battery can
be revealed. Vent holes in the filler caps should
always be kept open to let the battery gases
escape. Never remove battery caps except to add
water. The electrolyte level should be checked
each week. Never let the level drop to a point
where the plates are exposed. Pure or distilled
water should only be added when the electrolyte
level is low. DO NOT OVERF ILL, refer to Figure
F 1. Normal water consumption would be
approximately 1 oz. every 25 hours or weekly. If
it is greater, either the case is leaking or
regulator is overcharging and must be
adjusted. F-2
14
Gravity Check The ufos t re l i all e u'ay to
determine the
inthe elec-
concenti.it ion of sul fui
VENT WELL
trolyte is to me asure the relative weight or
specific gravity of the solution. A hydrom-
eter is used for this , and only enough solu-
tioiis removerl I rom a Matte ry cell so the
float is suspended I reely and not touching the
toga, Jaottom or sides of the glas s tube ,
Figure F 2. Ah a s hold the hyd rometer at e
e level and in vertic al pos ition when taking a
re nding. .A hydrometer reading is only cor rect
hen the ternper ature of the solution is 80 F
.
ELECTROLYT E LEVEL ABOVE PLATES
Llosthydiorneteis have aclilrated thermomeeitocorr
eoths
lVñen it is clove or Delo this reading, it has to
Le corrected either by adding.004 gravity
pOintsfor every 10 move 80ñ. or suLMuicting.004
gravity poi tsfoieveiyl0 Lelov 80 ?., Figure
P-3
HOL D HY DR ON\ ET E R VER TIC ALLY ST R AI GH T
TAK E REA DI NG AT EY E LEVEL
\\lien the specific gravity re allings tae- iss
cew the cells show a variition of .025, the
laatte ry should be repl aced.
Specific gravity re adin s n ill chan e de -
pending upon climate .
AFLOAT MU ST W BE FREE
State of Charge Specific Gravity Range for Climate Zone Specific Gravity Range for Climate Zone Specific Gravity Range for Climate Zone
State of Charge Frigid Temperate Tropical
1009t 1. 280 1. 260 1. 225
75 ,t 1. 230 1. 215 1. 180
509t 1.180 1. 170 1.135
Dis charged 1.080 1. 070 l .045
Figure F2
The battery should never be allowed to drop
below 75 charge while not in use .
TEM PER AT U RE I N " F OF EL ECT ROLY TE
mo T20 110
GRAVITY POI NTS TO ADD OR zlt SU BT R
ACT F R OM REA DI NG 16 IZ
\\'hen a L attery is to be charged, it may be
charged at any rate whi ch does not allow the
battery terminal voltage to exceed 15. 5 volts
(12 volt battery) while charging. The batte ry
temperature should never exceed ll0F . while
charging, if it does reduce charging rate .
90 BO 70 60 5O
9
O - o 8 -12
The charger should be left on until the
specific gravity readings stay the s ame lifter
three checks of an hour apart.
30 ZO 0 0
- 20 2 Z 52
A fast charge method is us eel onl to gi e the 1
atteries a boost for s t farting. This t Jae of
charge puts out a ve ry high irnpei.age un- til
the batte ry ternpe rature is uia to 110F . ,
then it shuts off.
Figure F-3
F-3
15
Incl ivicfual battery Cell Check Place a light
load on the toattery y crank- ing engine (do not
s tart engine) for 3 seconds . Turn on he
adlights, after one minute proceed with check.
Using a 4 volt voltmete r check the voltage of e
ach cell, refer to Figure F-4. If cell voltage
varies more than .05 volts repl ace battery. If
cell voltage is below 1. 95 volts , charge
battery and re check the cell voltages . If
cell voltage is still laelow 1. 95 volts or
varies .05 volts replace battery . battery
Cranking Voltage Test To perform the cranking
voltage che ck
VOLT M E T E R
On Spark Ignition engines remove the center
coil wire to prevent engine from starting
Figure i-4
Connect a volt meter (12 volt) between the
positive and negative terminals of the 1 at
tery, Figure F 5, Cr ank the engine for 15
seconds and re - cord voltage. 2. Connect
voltmeter (12 volt) between the starten
generator A terminal and ground on starter
generator fr ame, Figure F -5.
V OLTMET E R
BAT T E RY
SOLENOID SWITCH
Crank the engine and record voltage. If voltage
is not the s ame or varies more than .5 volt,
check the battery cables , cle an and tighten
connections .
V OLTM E T E R
C A R B ON B A NK R E0S I ST R
When battery is removed from the trac - tor,
connect a volt meter (12 volt) between the
negative and positive post, F igtire F - 6. A
load equal to 3 times the amp hour rating of the
battery should be connected between the positive
and negative posts and after 15 seconds , check
the volt meter reading.
"
If it is less than 9. 5 volts (12 volt Matte ry)
the battery should bra replaced .
B A T T ERY
F-4
16
sWITcH cHEcgt AND wcIrIcATIONs
Demo-Rene No. Case Anger ge Draw Voltage Dr aw both windings
1498 .\2148l
VA R lA BLE R GSI STOR
SpeLfeationsgiien attempeiatureof80-r
AIIo hook up, Figure F-T and slowly eeiezse the
long Khthevdlllleiesitoi
BAT T E RY
AMM ET ER
VOLTMETER
SOLENOID SWITCH
Figure F-T STARTER-GEN ERATOR OHECFU
ASNFDECIFIGATIONS
DLlco I\em3 TO. base fi'o. Brush Tens ion No Load Test No Load Test No Load Test No Load Test No Load Test
DLlco I\em3 TO. base fi'o. Brush Tens ion Volts Av . Amps . Max. Amps . RPM Min. Max.
1101970 .\70202 24-32 11 12 18 2500 2900
DIco Icm C tee No. field Current Drriw at 80 F . field Current Drriw at 80 F . Cold Output at 80 F . Cold Output at 80 F . Cold Output at 80 F .
DIco Icm C tee No. .Amps Volts Amps . Volts RPM
110l9T0 AT0202 1,52-1 62 12 12 l4 4950
STARTER NO L-OAD TEST
BAT T E RY
AMMETEB
VA RI ABLE RESI STOR
VOLTMETER
For the no load test, connect the s t arter-
gener ator in series with a 12 volt battery, 300
amp. ammeter, a vari able resistor conne
cted to the A termin al. Ground the Y
terminal, Figure F - 8. \\ith the starter
running, check the RPM with a tachometer . Check
the cur rent draw and volt age draw. The
should meet the specifications listed imove .
If the st arter - gener ator does not meet
these specilic ations , it must be ser- viced
or red laced.
TACHOMETER
Figure F-8
F-5
17
EhJEFtATOR OUW-F'UW CHECK The output test can
be matte on the tractor using the engine to
drive the unit. When test is made on the bench,
orne me ans of driving the unit will Joe neces s
ary. Be sure the drive belt is adjusted
properly.
VA RIABLE RESISTOR
Dis connect all cables and cvires to generato r.
Connect ammeter and vari able res istar.ce in
series between the A terminal ancl gene r -
ator frame . Connect voltmete r from the A
terminal to the frame . Inst all jumper le ad
from the Fterminal to the frame, Figure F -
9. Drive the unit at specified R PM, ic1jus
t to specified voltage by varying the res is
- tance . When the ammeter reading is low er
than specified ampe rage, the unit must lie
serviced or replaced. If ampe rage output is too
high, disconnect the jumper lead front the field
F ierminal. If ammete r reading is still
high, unit will have to be se rvi cell.
AMMETER
TACHOMETER
Figured-9
XTARWER-GENERATOR DRIVE TEST ADJUSTMENT
STA R T E R - G E N E0R AT R PU LL E Y
The starter - generator drive belt should be
checked for excessive looseness anal we ar after
the first 10 hours of operation and e ach 25
hours of oper ation there after . The belt
tension is cor rect when the melt can be
depressed 1/4 (finger pressure) met - ween the
pulleys , Figure F - 10.
Under no cir cunts tances shoulrl a pry luar be
used on the starter - generator to obt min belt
tension, as damage to the bearings could result.
1 4 D E F L0E C TI N
CRANKSHAFT PULLEY Figure F-10
F-6
18
REGULATOR OHEOKY AND SFECIFIOATIONS
Delco Rene Case No Cutout Re lay Cutout Re lay Cutout Re lay "oltage Control "oltage Control "oltage Control "oltage Control
Delco Rene Case No ,Ah GI d PO11)t Opening ilOST0_at_ Y oltage VOlt6QO Adj . Air Gap Voltage Range Voltage Adj .
1118.988 .\ 70.221 . 0 20 . 020 11. 8- i4. 0 12. 8 . 075 13. 6- 14. 5 14. 0
VA RI A BLE RE SI STA NC E
The regulator c'.in I e checked on the trrictor.
Dis conne ct and tape the wire to the B termin
al at the regul ator and disconnect the ires to
the L terminal of the regula tor. Comect
test ectuipment, Figure F 11. Start the engine
and run at 100.0 RPhI or run the geiâe l"ittor
at 25oo neM for 15 minutes t let regul ator
v-arm up to operating temp- erature . The i-.iri
aisle resistance must have an open pos ition and
during w arm up must tae in the open position.
Turn variaJale re s is tance slow ly until all
res is tance is cut out. Note volt age setting.
If test is reIe ated, ale avs turn variaisle
resistance track to the open positi on 1 efore
the voltage is again r aised.
G RE U LATOR
RES I STO8 ? oh m s
V OLTMET ER
Figure F-11 CUTOUT REL.AV CI-.OSING VOL.TAGE
CHECK
RE GU LATOR
R ES I STOR 7 oh mc
Turn the w.Sri aJ le res ist since gtlo vly to the
open position and then 1 tick s low l to
eutout res is t ance until the re 1try c loses
(sharp drop on the volt urge re ailing) . IN test
is to lie repe ited ale a's ieturn to the
open pos iti on before test.
VOLTMETER
Figure F- 12
F-7
19
icwl"rion "riuinc Acljusting breaker
Foints Every 100 hours of ope r ation, the fare
aker point cover should be removed ancl the
points cleaned and reset. Pitted or laurnecl
points
R ETA I N I NG SCRE W
should be replaced. Regap the points to . 020
inch. Loosen the point retaining screw and using
a s crewd river in the adjusting slot, increase
or decrease the point gap to obtain .020 inch,
Figure F -13 . Retighten the point retaining
screw.
B RE A K E R POINTS
Figure F-13
Running Timing
The timing can be checked by removing the plug
from the timing hole located on the left hand
side of the bearing plate.
When the running timing is checked with a timing
light the SP mark must be center- ed in the
timing hole, Figure F- 15. If not, adjust the
breaker points as described above.
Figure F- 15
IGNITION COIL. SPECIFICATIONS
Delco Remy No. Case No. Resistance, OHMS Resistance, OHMS at 75 F ,
1115070 KO 231281 Primary Secondary Secondary Secondary
1115070 KO 231281 3.40 -4. 20 3000 - 20, 000
iGNlTioN coNoENsER sFEciricATioNs
Delco Remy No. Case No. Capacitance
1942948 KO 2307 22 . 18 to .23 MFD.
F-8
20
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21

• CONTACT POINTS
• Inspection
• After each 100 hours of operation the breaker
  contact points should be checked for wear and
  adjustment.
• The visual inspection should be a part of the 100
  hour check
• COLOR - The normal color for contact points is
  a light gray. If the surfaces are black, the
  cause is usually due to the presence of oil, dirt
  or foreign matter.
• If the contact point surfaces are blue, the
  cause is usually due to overheating because of
• Improper alignment of contact points .
• Excessive high wattage in the primary circuit of
  the ignition coil.
• Poor condenser.
• CONTACT SUHF ACE WE AH - wear patterns that, can
  exist and their causes.

IDE AL CONT ACT POINT WE AR PATTERN
REPL AC E CONTACT SET WHEN TR AN SFER E XCEEDS .
010
Cf9NTAC T POINT WEAH PATT ERN SUCH AS THIS
INDICATES CONDENSER CAP ACITY MAY BE TOO
LOW- THIS IS A NORMAL WEAR PATTERN, BUT
INDICATES
WHY THE CONDENSER SHOULD ALWAYS BE RE PLACED
AT THE SAME TIME POINTS AREREPLACED
TR ANSFER OF M AT ERI ALS FkOM - POINT TO -I- POI
N T
CONTACT POINT WEAR PATTERN sUCH AS THIS INDICATES
CONDENSER CAPACITY MAY BE TOO HIGH USE ONLY GE
NUINE CASE CONTACT POINTS - COND E NSER RE
PLACE MENT SE TS TO INSURE THE COR- R E CT CONDE
NSER CAPACITY AND CON DENSER LEAD WIHE LENGTH.
TR ANSFER OF M AT ERI ALS FROM -I- POINS TO- POI
N T
F-9
22
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