Toro Groundsmaster 5900 Series Service Manual page 246

Front Cutting Deck Lift Cylinder Disassembly
Front Cutting Deck Lift Cylinder Assembly
Hydraulic System: Service and Repairs
B. Insert a screwdriver under the beveled edge of the retaining ring to start
the retaining ring through the opening.
C. Rotate the head counter−clockwise to remove retaining ring from barrel
and head.
4. Extract shaft with head and piston by carefully twisting and pulling on the
shaft.
When securing shaft in vise, clamp on shaft clevis only. Do not
clamp vise jaws against the shaft surface.
5. Mount shaft securely in a vise by clamping on the clevis of the shaft. Remove
lock nut and piston from the shaft. Slide head from the shaft.
6. Remove piston seal and O−ring from the piston. Remove O−ring, back−up
ring, wear ring, dust seal and shaft seal from the head.
7. Wash parts in clean solvent. Dry parts with compressed air. Do not wipe parts
dry with paper towels or cloth. Lint in the hydraulic system will cause damage.
8. Carefully inspect internal surface of barrel for damage (deep scratches,
out−of−round, etc.). Replace entire cylinder if barrel is damaged. Inspect
shaft and piston for evidence of excessive scoring, pitting or wear. Replace
any damaged parts.
1. Make sure all parts are clean before reassembly.
2. Coat new O−rings, piston seal, wear ring, shaft seal, back−up ring and dust
seal with clean hydraulic oil.
A. Install piston seal and O−ring to the piston.
B. Install back−up ring, O−ring, wear ring, shaft seal and dust seal to the
head.
When securing shaft in vise, clamp on shaft clevis only. Do not
clamp vise jaws against the shaft surface.
3. Mount shaft securely in a vise equipped with soft jaws by clamping on the
shaft clevis.
A. Coat shaft with clean hydraulic oil.
B. Slide head and piston onto the shaft.
C. Secure piston to shaft with lock nut. Torque lock nut to 176 N·m (130
ft−lb).
4. Lubricate head and piston with clean hydraulic oil. Slide shaft assembly
carefully into cylinder barrel.
(Figure 127) (continued)
IMPORTANT
(Figure 127)
IMPORTANT
Page 5–146 Groundsmaster ® 5900 & 5910
16227SL Rev B