Upright SL26SL Service Manual page 46

Service and Repair
0.4 S C
TEERING YLINDER
Removal
1. Mark and disconnect the hose assemblies from the fittings and immediately cap the openings to prevent
foreign material from entering.
2. Remove the setscrews securing the rod ends to the steering linkage.
3. Remove the setscrews and locknuts that fasten the cylinder assembly to the chassis.
4. Remove the cylinder from the chassis.
Disassembly
1. Remove the headcaps from the barrel tube.
2. Mark which end of the barrel tube the headcap was removed from.
3. Withdraw the entire shaft assembly from either end of the barrel tube.
4. Remove the rod wipers, rod seals and static O-rings from the headcaps.
5. Discard all the seals.
6. Unscrew the No. 1 shaft from the No. 2 shaft and remove the piston.
7. Remove the piston seal and static O-ring from the piston and discard.
Cleaning and Inspection
1. Wash all the metal parts in cleaning solvent and blow dry with filtered compressed air.
2. Inspect all the threaded components for stripped or damaged threads.
3. Check the inside surface of the barrel tube for scoring or excessive wear.
4. Check the piston and head caps for scoring or excessive wear.
5. Inspect the surface of both shafts for scoring or excessive wear.
Assembly and Installation
1. Install a new piston seal and static O-rings.
2. Install the piston on the No. 1 shaft.
3. Thread the No. 2 shaft onto the No. 1 shaft and tighten securely.
4. Lubricate the piston seal with clean hydraulic fluid and install the shaft assembly in the barrel tube.
5. Lubricate and install new rod seals and static O-rings on the headcaps.
6. Lubricate and install new rod wipers in the headcaps.
7. Install headcap in the barrel tube and tighten until the mounting holes are in-line.
Note: Headcaps must be reinstalled in the same end from which they were removed.
8. Install the fittings in the ends of the cylinder.
9. Position the cylinder assembly in the chassis and install the capscrews and locknuts, but DO NOT tighten.
10. Tighten the nut and bolt in front of the cylinder that goes through the frame and then tighten the cylinder
mounting capscrews.
11. Install the cylinder rod ends.
12. Set rod ends to allign front wheels.
13. Connect the hose assemblies to the fittings.
14. Operate the steering circuit several times throughout its' entire range of travel to expel trapped air and
check for leaks.
3-20
(F 0-5)
IGURE