Cylinders

1
Cylinders
2
Parts of a cylinder
3
Types of cylinders and their function

• Single acting Cylinder-- a cylinder in which
  fluid dorce is applied to only one side of a
  piston to move the element in only one direction
• Double acting Cyliner-- a cylinder in which fluid
  force can be applied to the movable element in
  either direction

4
Kinds of cylinders

• Telescoping Cylinder-- in forklifts-cranes
• Double acting double end rod--rod on each
  end--provide force in both directions
• Cushion Cylinder-- keeps item from coming to a
  hard stop--slowly releases fluid at one end
• Stepped Cylinder--provides for a rapid start

5
Rating system of Cylinders

• Book discusses a number system (see text)
• Most important is by diameter of cylinder
• (piston head)
• Also by stroke length
• length from pin to pin
• mounting pins
• One on each end 1) cylinder housing 2) on rod

6
Identify the schematic symbols of the common type
of cylinders
7
Telescoping Cylinders
8
List five service tips for properly maintaining
cylinders

• External leaks
• internal leaks
• creeping of a cylinder-moves
• sluggish operation
• loose mounting
• lack of lubrication
• burns on rod
• blocked air vents

9
Describe the procedure for bleeding a hydraulic
cylinder

• Work the system back and forth until air is
  worked out or bleed the lines out