CASE 180 Compact Tractor Service Repair Manual Instant Download

1
CASE 130 and 180 Compact Tractors Service
Manual 9-76391
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 G Is instructed in
safe and proper use of the machine. G Reads and
understands the Manual(s) pertaining to the
machine. 0 Reads and understands ALL Safety
Decals on the machine. 0 Clears the area of
other persons. 0 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.
Bur 0-00000 issued November, 1994
2001 Case Corporation
CASE and IH are registered trademarks of Case
Corporation
3
TABLE OF CONTENTS 130 AND 180 COMPACT TRACTORS
SERIES SECTION GENERAL DESCRIPTION FOR 4 NUMBER
Specifications For K241S And K301S Engines .....,...... ,,... e- u Specifications For K241S And K301S Engines .....,...... ,,... e- u Specifications For K241S And K301S Engines .....,...... ,,... e- u Specifications For K241S And K301S Engines .....,...... ,,... e- u Specifications For K241S And K301S Engines .....,...... ,,... e- u
20 ENGINES ENGINES
Servicing The Kohler K241S And It301S Engines .........,.,..,,,...... Servicing The Kohler K241S And It301S Engines .........,.,..,,,...... 9-76361
FULS7STEM FULS7STEM
N Servicing The Carburetor And Fuel Pump ... , . , , .....,.,.....,,..,..... Servicing The Carburetor And Fuel Pump ... , . , , .....,.,.....,,..,..... 9-76361
40 ELECTRïC.AL ELECTRïC.AL
F Electrical System ... .....,...,,,.....,,,........... ,..,.....,.......,. Electrical System ... .....,...,,,.....,,,........... ,..,.....,.......,. 9-76371
50 STEERING
O Servicing Tha Steering System ....,,,......,,,............ . . . . Servicing Tha Steering System ....,,,......,,,............ . . . . e-76311
80 POWER TRAIN POWER TRAIN
S Servicing The Two Speed Transmission ........,.,.,.,.........,,., . , , . Servicing The Two Speed Transmission ........,.,.,.,.........,,., . , , . 9-76301
60 HYDRAULICS HYDRAULICS
B Servicing The Hydraulic Pump , .. , , . , , ....,.... Servicing The Hydraulic Pump , .. , , . , , ....,.... 9-76291
D Servicing The Control Valve And Orbital Motor .....,............ ,.. Servicing The Control Valve And Orbital Motor .....,............ ,.. 9-76351
90 ACCESSORIES ACCESSORIES
Installing - Operating - Adjusting The 38" And 44 Installing - Operating - Adjusting The 38" And 44
Rotary Mowsrs And 44 Dozer Blade Rotary Mowsrs And 44 Dozer Blade 9-76501
Servicing The Rotary Mower And Dozer Blade ........,.........,....... Servicing The Rotary Mower And Dozer Blade ........,.........,....... 9-76461
Rac 9-78381
ATenneco Company
4
https//www.ebooklibonline.com Hello dear
friend! Thank you very much for reading. Enter
the link into your browser. The full manual is
available for immediate download. https//www.ebo
oklibonline.com
5
(No Transcript)
6
SPECIFICATIONS FOR
SECTIzN
K 24JS AND K 30JS ENGINES USED CN \30 AND 180
GARDEN TRACTCRS
8oc. Ferm 9 - 76 4 I
7
ØtNöa Ya Jye7 ap æt Cteax aooø (Cmd)------------4
OB010 tmNæø Ødœwf wo Comtes (CMØ ------
--01Y-ŒD flæôæ
VAtV Ø ØPt lNOS
8
Cotop. st Craoktag Speet (agtne at Opecattog
7ezopecuture) --------\ CO to t3O PSt at 9eA
Leeet Craokcaae VscuumEngine Ruruüng)--- Sto l0
Inctiea Vacuum at Sea hemel
VALVRttWTRBR VWveLtMetOwtmüieDMsuMetImB1mR--------
----8Z3L623JIncbes Yatee IIfter Boce la Black
------- --- ------.62t5-,83S5 Tocbea
CYthïDER BORD Diameter of Cyltnder Boee Std. \,
B-------------3.374L3.378S mctias .010 Oreisise
A, B IO --------------- 3.384ii-3.3855
löcfi4b .0S0 'rersize A, B 30 ---------------
3.394M3,38SS Inchea .030 C'reratze A, B 30
--------------- 3,404Mü.40ii6 Inetiee Cyltnder
Bore Must Be Bored ne Stoned Overatze If Taper or
Out ot Rourd
YaJse Ldtor 'To Black C1aaraoce
-------------------.00s.002s locöag
TAtae Tat'ee 'ï'appet Cleazaoce (CoB - - --
---.008-.010 tacbes
Diameter ot Std. Ptaton at Top -------------------
3.36 -3.380 lnchea mametee of Stb. Ptatmt at Top
of Shtrt (Heneured Juat Below Ott Rtng)
------------------ 3.388-3. 370 fnehee Diameter
of m Ptaton at Bottem of Sktrt ---------
3.371-3.m2 tochea
zx6xua value z'ppet cis aaa (clay
--------------.oz/-.ozo iocbea
Aiste lt Yxtee E'ace - sttake aad Sxhauat
---------------- 44 Degreea Ytte I,eAtb -
Eatake aot EsJzaust --------------- S.572-4.SBZ
j0cAea
PtstoA Ptn -------------------------- huh
Ftottng type RetaAned In rbcewthTwoRaMeRMS
Ptxtmt Pla Dtxaietay Std. -----------------.------
-.8'7G2-.8y4 Incbea .OOP' Overetze
------------------------- .8602-.8804
ïocbe8 YMveMemDtmster -btsk--------------------
.3105-.3110 Mt)es Ptaton Ptn Fit to maton
----------------------- ome Tmtmo fueb rtt
na ra rit u cmui ma ------------------.oom-.oom
u
ttrtete dale Steen to tuttte Clasrsoee
------------- .(Dl-.0o2S incbas
1gt CQ_at_p. ----------------- Q'7-.Q28 Igcgeg Zrd
Coozp. ----------------- .027-.078 Tachea 3cd OM
taM -------------- .023A.0345 I0c es 3rd Otl
Rtng ---------------- .134-,135
lacbea Connect Rod Length Prooi Center of Pm
Hele To Ceittet of Baartng Journal
------------------5.285-ö.38'? lncbea
Ftston Pin Hole Diameter In M --------- -
------- .8f S7 -.57ö0 tnctiea lnetde Dtametee of
nod General, Std. ------------ 1.ämS-1.S0i0
iactwa boderetze ------------- 1.48fi-1,4910
lnchoa
VWe bB (Mmrt-----------------ö40gtB böm team
Yatve Gutdas Attar lnstellkig to
-----------.4i2-.412 inebea
Conngctlng Rod To Crack JourW Clearanee
-------------.000s-.O015 COI Ct End CO CWAEmd
Btw Cl armntP--------.007-.Ol6teChe
ia eurt comr. to i.xeo u . tvarr cioed)
-m in st m. Jrtm PreTuure When Comp. to 1.185 In.
tVelre Open) --S4 to 8z bbc.
Crenkoheft ttod Journal ------------------------
t.489M1.SOLO lncliea
OOVBRMOR Govezaar 8bzb Gbaft Outalda DMaeter
------------ .973a.3240 jacbes
Stub 8batt to Toreruor Gear clearance
------------- .0005-,002 metres cnor errig
Pree Length witt z Lb. ree-word -------- 2.8z
inbe Governor bring RzteziAed to 0.88 Incbea
------------ iLS to 8, G faction
9
'QEME RAC TORUG SPECl6lCATtOhJ TARLK Revlseltl 6-BA3 USE THE FOLLOWING TOROUES WHEN SPECIAL TOROUES ARE NOT GIVEN NOTE These values apply to fasteners as received from supplie r, dry, or when lubIlCated with normal englne oi1. They do not apply if special graphíted or moly-disulphide greases or other extreme pressure lubricants are used. This aplies to both UNF and UNC threads. 'QEME RAC TORUG SPECl6lCATtOhJ TARLK Revlseltl 6-BA3 USE THE FOLLOWING TOROUES WHEN SPECIAL TOROUES ARE NOT GIVEN NOTE These values apply to fasteners as received from supplie r, dry, or when lubIlCated with normal englne oi1. They do not apply if special graphíted or moly-disulphide greases or other extreme pressure lubricants are used. This aplies to both UNF and UNC threads. 'QEME RAC TORUG SPECl6lCATtOhJ TARLK Revlseltl 6-BA3 USE THE FOLLOWING TOROUES WHEN SPECIAL TOROUES ARE NOT GIVEN NOTE These values apply to fasteners as received from supplie r, dry, or when lubIlCated with normal englne oi1. They do not apply if special graphíted or moly-disulphide greases or other extreme pressure lubricants are used. This aplies to both UNF and UNC threads.
SAE Grode No. t S 8 8
Bali keod identificotion morks os per grode - Note Monufocfuring Morks Will Vary lar que Foot Pounds Torque Foot Pounds Torque Foot Pounds
Bolf Size ) Mín. Max. Mín. Max.
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts ï2 TS
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts 24 28
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts 45 50
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts 70 80
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts ïtO J25
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts ï6O 180
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts 220 240
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts 380 420
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts 6oO óóo
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts 900 1000
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts 1280 1440
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts J800 2000
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts 2380 2720
ï 4" 9 1ï 5 16 15 ï8 3x8 35 40 7. ïó S4 60 ) 2 80 90 9xJ6 It O t20 5/8 ISO 1óS 3 4 260 280 T./8 360 400 I 54o óo0 1-1. 8 720 800 1-1 4 1000 ï1OO 1-38 14ó0 1680 ï-ï 2 1940 2200 Thick nuts must be used with Grode 8 bdts 3160 3560
GENE RAC EfdClF3E TOROUE 2EOI6ICATION TAk-E GENE RAC EfdClF3E TOROUE 2EOI6ICATION TAk-E GENE RAC EfdClF3E TOROUE 2EOI6ICATION TAk-E GENE RAC EfdClF3E TOROUE 2EOI6ICATION TAk-E GENE RAC EfdClF3E TOROUE 2EOI6ICATION TAk-E GENE RAC EfdClF3E TOROUE 2EOI6ICATION TAk-E
Torque Inch Pounds Torque Inch Pounds Torq Foot Pounds Foot Pounds
Threod Size UNC UNF UNC UNC UNF
Bolt Size
7'0 85
ï50 lò5 22 3soS 22 3soS 25 45 70
specta enoine votpue sPecrcAToNs Cylinder
Head Bolts ----- ------- -------- Torctue to
280 Inch Lbs . , Loosen, Retorque Connecting
Rotl Bolt ---------------------------------------
---- Torque to 300 Inch the. Flywheel Nut
-------------------------------------------------
orque to 100 Ft. Lbs. Lubricate With
Grease Upon Assembly
10
(No Transcript)
11
SERVICING THE
SEC7ION
KOHLER K24JS AND K3OJS ENGINES
ko c. Fer m 9 - 763 6\
12
nsoDucviox ........... , ....................,..
.... M-,
TABLE OP CONTENTS
CI2ECKING CO51PRESSION PEtE3SUItE
.........,. M-3
CHECKING CRANKCASE VACUUM .... , ... CYLINDER
HEAD YALVES, GUIOES AND SPRINGS . , , ... ......,
.. , t- Removal, Inspection, Installation
........ ,.. ,,.. ,.,, ,. ,, . , , t-q vA sv
Aniusisr ..................................
,i-,
INSPECTION OF THE VALVES, GUIDES AND SPRINGS
............M -6, M-7
REPACING INTAKE AND EXHAUST VALVES ....... , .. ,
.., ...... INTAKE AND EXHAUST VALVE SEATS
..,.... .,.... .......... Grinding and
Inspection .... , . ..... ,,.. ...... .. ....,..
, ,
ytg
5i-g or-g
ENGINE AND ATTACHING PARTS .......................
.... Removal and Installation ... ..... ... . ..
.. .......... ..... . ENGINEBLOCK................
..................... . . Disassembly.............
.................,.........
M10 M-to
M-12
M-12
PBTONANDCONNECTIEGROD ............................
114 Disassembly, Inspection and Assembly ,
......... ........ ii-ii, u-is
CAMSHAFT - CRANKSIIAFT AND ENGINE BLOCK
............ lnspect o .......................
... ............
AI-16, M-17 -16, - lJ
ENGINE BLOCK ................................
..... M-18
M-2
13
This manual covers servicing the Kohler IOHP 241
S and 12HP 301 S engines. There are some minor
differences between these engines such as the
bore and stroke. The difference will be
indicated in the manual when they appear.
These engines are of the 4 cycle type, splash oil
lubrication, cast iron block and electric
starting. REFGR TO THE SPECIFICATIONS SECTION OF
THIS MANUAL FOR DIMENSIONS,TOLERANCES,ETC. WHEN
SERVICING THIS ENGINE. THESE DATA ARE NOT
INCLUDED IN THIS SECTION. ci-fEcKlNo
coMRzssIoM REssuRE Should you receive a
service complaint dealing with excessive oil
consumption, loss of power, hard starting,
rough running or excessive smoke, cheek the
compression pressure and the crankcase vacuum.

• Steam olean engine thoroughly.
• V'arm np engine to operating tempera-
• ture.
• Remove the spark plug and shut off the fuel
  valve,

leaking valves or excessive ring clearance is
indieated.

• OMPRES SION GAUGE
• With the speed control lever in neutral ay
  brake position, use a compression gauge
  similar to that shown in figure M-l.
• Crank the engine with the starter and check the
  eompression pressure, refee to Specification
  Seetion, IN the pressure is 20 PSI or more below
  the specified pressure,
• Figure M-1
• CHECKldO CRAAIKCAGK
• The crankcase breather maintains a par- tial
  vacuum in the crankcase, To check vacuum proceed
  as follows
• Drill and tap a 1/8 NPT in a 3/4" pipe plug or
  use a 1/8 to 3/4" pipe reducing bushing.
  Install in place of the engine oil
• Attach vacuum gauge to pipe plug, Figure M-2.
  Start engine and run at Ion' idle speed. Reler
  to specilication Section for proper vacuum.
• No or low vacuum indicates a faulty breather,
  excessive blowby, leaking valves or worn oil
  seals.
• FipreM-2
• M-3

14
CYL-INDER HEAD VA6VEM,QUfDGE ANO Refer to
wisure M-aJ
PRIMGE
Steam clean engine before doing any
disassembly or service work. Close the fuel
tank shut off valve and disconnect the fuel line
at the carburetor. Disconnect the choke and
throttle connec- tions at the carburetor.
Disconnect gover- nor linkage and remove
carburetor (1) and baffle (2) . Remove and
disassemble breather (25-31) , cylinder head
bolts (4) . Remove the engine air deflector (5)
, cylinder baffle (6) and head baffles (?) ,
Remove the generator ad- justing bracket (8)
. Remove the spark plug (9), wire (10) ,
cylinder head (11) and gasket (12) from
cylinder block (13) , Using a valve spring
compressor, inset A, compress the valve
springs (17) and remove the valve retainer loks
(15) . Remove the valve retainers (16) , springs,
spring retainers (18) , and valves (19) . To
remove valve guides (20) , drive them down into
the tappet chamber and carefully break them
off. Drive the balanee of the
guides down and remove, QJ Be
very careful not to damage the cylinder
block when breaking off the guides. The
exhaust valve seat (21) can be removed by using a
seat removing tool, refer to inset B, Remove
tappet adjusting sGrews (22) if they are to be
replaced.
Remove all Carbon from head, bore and valve
guides. Blow out with compressed air. Refer to
Pages M-6 and M-7 for inspection of valves,
seats, Inspect the tappet adjusting screws for
wear and replace if worn, Check the cylinder head
for warpage by using a face plate, The head
should make contact at all gasket surfaces. If it
doesn't, replace eg linder head. InetalIatlcn
Drive new valve guides (20) in place un til
they are flush with the bottom of the valve
chamber, The guides must be reamed to size after
installing, refer to Specifica- tion Section for
proper dimension, Install exhaust seat (21) by
cooling it in dry ice and drive into the
block. Install valves (19) , spring retainers
(18) springs (17) and valve retainers (16) . Com-
press valve springs and install locks (15)
. Install new head gasket (12) after soaking it
in oil. Install head (11) baffles (6) and (7),
air deflector (5) generator bracket (8) and head
bolts (4) , Tighten head bolts to proper torque.
Back of the bolts arid retorque to proper torque.
Refer io Specifications Section. Clean, regap and
install spark plug (9) , Adjust tappets, refer to
tappet adjustment. Install the breather assembly
in the follow- ing order, stud (24) gasket (25) ,
plate (26) with small drilled hole down, reed
valve (2 and baffle (28) , Clean and lubricate
filter (29) with engine oil and install.
Install outer gasket (30) , seal (31) , cover
(32) washer (33) , and nut (34) . Tighten the nut
only enough to make a good seal. Install baffle
(2) carburetor (1) and gas- ket, Connect throttle
and choke connections. Connect governor linkage
and fuel line. Open fuel tank shutoff.
TAPPGT AONURTMGt'dTR Hand crank the engine to
set piston at the DC mark of the compres- sion
stroke, inset C, Outward pressure will be felt
when the thumb is placed over the spark plug
opening when the piston is coming up on the
compression stroke, A lighter pressure is also
felt on the exhaust stroke. DO NOT CONFUSE THE
TWO, Refer to Speeification Section for proper
tappet clearance, Using a ieeler gauge, set
tappets,inset D,
M -4
15
oval inspection anz Inætaflatiltzn
INSET B
YAtVE SPg ING
COMPRESSOR
/r
Figure M-3
-
16
tusPecTioN or vnz vnuvas,ouloes Auo srztnos
Valve springs should be checked for flat squared
ends, broken or cracked coils and correct spring
pressure. Use a Valve Spring lensom Telex Reer o
SpeMGcMMn"
HEAD
S7 Ght
Valve guides can be checked for wear buy using a
bore gauge and micrometer, Figure
FipreM-6 Inspect the valves for excessive we ar
or necked stems, Figure II-7. This can be
caused by lack of lubrication,plugged or dirty
cooling tins or operating the engine under
continous overload at excessive engine RPM. If
these conditions exist the valves and guides
should be replaced.
CROM ETER
ripreM4 'I'he valve guide should be checked at
the top, middle and bottom of the More for wear,
Figure ñl-5.
VALVE STEM NECKED
Figured-f
E X PANDABLE 8OBEGAUG
Inspect the valves for deep grooves in the face,
r igure M-8. This can be caused by abrasives
entering the engine through the intake system
or not servicing the air c1e.an- er regul arly.
A leaking breather gasket can also cause this
condition. If grinding the valve face will not
correct this condition, replace the valves .
CHECK WEAB OF VALV E GUIDG AT TH9 EE POIN TS
AS LGAST
Fi rem-5
Figure M-8
The inside diameter wear limits of the valve
guide should not exceed the specifies- tion given
in the Specification" Section, at any point
along the bore of the guide, Replace guide if it
does. Check the new vrilve guides Hter
installation to make sure that the bore is not
less than the inside diameter given in the
Specification" Section. Using an Arbor equal to
the inside diameter of the valve guide will keep
the guide from collapsing when pressed in
place. Clean the valves Frith a power driven line
wire brush being very careful not to scratch the
viilve stems. Reference is made to the different
parts of the valve, Figure M-6.
Inspect the vilve tace and stem for rust or
pitting, Figure M-9. just orpitting can usu- ally
tae removed by grinding the valve face. If rust
or pitting on the valve stem exist the valve
should lie replaced.These conditions can be
caused by using poor quality engine oil or fuel
that doesn't meet the specifics- tion given in
the Operator's Manual. Rust could be caused by
improper storing of the engine.
6 UST Ok PI YTING
1'igure M-9
M-6
17
Suggest If the above button click is invalid.
Please download this document first, and then
click the above link to download the complete
manual. Thank you so much for reading
18
!nSPECTION OF THE VALVEE,OUIDEO AND RRtNOE
/Oczntz 3
Heavy carbon or vanish deposits on the valve,
Figure M-10, should be removed be- fore valves
are ground. This condition is
The valve stem should not vary more than the
wear limits given in the Specifica- tion
Section at any point on the valve stem, If this
condition exists, the valves must be
replaced. The checking of the valve face
runout should be done after the valves have been
ground. A Vee block type holder with a dial
indicator, Figure M- 14, should be used to check
the valve face runout, The valve face should not
vary more than the specification given in the
Specification Section, The valve stem runout
can also be checked with this Vee block and dial
indicator.
usually caused by won piston rings and
bore which allow too much oil to reach the
combustion chamber. This condition could also be
caused by worn valve guides. These conditions
should be corrected or the same trouble with the
valves will happen again, HEAVY CA9BON AND VABN
ISH DEPOSI TS
Figure M-10 Irtapect the valve head for dishing
and the valve face for deep burned spots, Figure
M-11, These conditions can't be corrected by
grinding the vNves. The valves should be
replaced. These conditions are usually cau- sed
by running the engine under excessive load, at
high engine temperatures.
CHECI I NG VALV E FACE g UNOUT
Ol AL I ND ICATOk
DEEP BUkNED VALVE FACE Figured-11
Valves with worn lock grooves or the stem is
worn or dished beyond the chamber must be
replaced, Figure hI-12, wOeN xE A i NGy GaOOVE
Figure M-14 nnerdrr Small amounts of very line
pitting, Figure M- 15, may be found on the
surfaces ot the valve faces and seats after the
valves are cleaned.
FigureLI-12 The checking of the valve stem
diameter can best be done with a good accurate
mi- crometer Figure M-13.
Figured-15 These are normal and will not affect
en- gine performance. This line pitting is caused
by a normal oxidation process and ean hap- pen on
any engine during the run-in-period. It is not
necessary to grind valves or seats it this fine
pitting is found as the pitting will generally.
reoccur after the engine is run for a few hours.
CHECK DI AMGTER OF STEM AS THR5 POINTS AT LEAST
Pigure M-13
M-7
19
https//www.ebooklibonline.com Hello dear
friend! Thank you very much for reading. Enter
the link into your browser. The full manual is
available for immediate download. https//www.ebo
oklibonline.com