Hydraulic Cylinder - Branson 2000 series Service Manual

4. CHECKING, DISASSEMBLING AND SERVICING
< Hydraulic piston >
1. Inject the compressed air into the hydraulic
cylinder, and take out the hydraulic piston.
▷ Reassembling
Take care not to damage the O-ring and backup
ring.
Apply transmission fluid to the O-ring.
Replace the O-ring if it is defective, worn or
scratched, which may case oil leakage.
< Lowering speed adjusting valve >
1. Remove the internal snap ring(1) and pull out
the lowering speed adjusting valve with shaft(2).
2. Draw out the ball(5) and spring(6).
▷ Reassembling
Take care not to damage the O-rings.
*. PART NAME
1) Internal snap ring
2) Lowering speed adjusting valve with shaft
3) Stopper

4) Hydraulic Cylinder

< Separating hydraulic cylinder assembly >
-. Reference the page 89.
< Position control valve >
1. Remove the position control valve mounting
screws, and remove the position control valve.
▷ Reassembling
Take care not to damage the O-rings.
Position control
Tightening
valve mounting
torque
screws
4) O-ring
23.6 to 27.4 N·m
2.4 to 2.8 kgf·m
17.4 to 20.2 ft-lbs
5) Ball
7) Collar
149
HYDRAULIC SYSTEM
6) Spring
KUKJE MACHINERY CO., LTD.