caution - Toro
caution - Toro
caution - Toro
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Disassembly (Fig. 68)<br />
1. Pump oil out of cylinder into a drain pan by SLOWLY<br />
moving rod and piston in and out of cylinder bore. Plug<br />
ports and clean outside of cylinder.<br />
IMPORTANT: To prevent damage when clamping<br />
cylinder in a vise, clamp only on pivotal ends. Use<br />
of a vise with soft jaws is recommended.<br />
2. Mount cylinder in a vise so rod end of cylinder is tilted<br />
up slightly. Do not close vise so firmly that cylinder tube<br />
could become distorted.<br />
3. Loosen head from tube:<br />
A. Use a spanner wrench to rotate head clockwise<br />
until the edge of the retaining ring appears in the tube<br />
opening.<br />
B. Insert a screwdriver under the beveled edge of<br />
the retaining ring to start the retaining ring through<br />
the opening.<br />
C. Rotate the head counter--clockwise to remove retaining<br />
ring from tube and head.<br />
4. Grasp end of piston rod and use a twisting and pulling<br />
motion to carefully extract piston, piston rod and<br />
head from cylinder tube.<br />
IMPORTANT: Do not clamp vise jaws against piston<br />
rod surface; the piston rod will become damaged.<br />
5. Securely mount piston, piston rod and head into vise<br />
and remove piston. Remove head from rod.<br />
6. Remove and discard all seals and O--rings from<br />
head and piston.<br />
7. Wash parts in clean solvent. Dry parts with compressed<br />
air. Do not wipe parts dry with paper towels or<br />
cloth. Lint in a hydraulic system will cause damage.<br />
8. Carefully inspect internal surface of barrel for damage<br />
(deep scratches, out--of--round, etc.). Replace entire<br />
cylinder if barrel is damaged. Inspect rod and piston<br />
for evidence of excessive scoring, pitting or wear. Replace<br />
any damaged parts.<br />
Assembly (Fig. 68)<br />
1. Use a complete repair kit when rebuilding the cylinder.<br />
Put a coating of clean hydraulic oil on all new seals<br />
and O--rings.<br />
2. Install new O--rings and seals to the piston and head.<br />
3. Lubricate shaft with clean hydraulic oil. Slide head<br />
onto shaft. Install and tighten head. Torque head from 45<br />
to 55 ft -lb (62 to 74 N -m).<br />
4. Put a coating of clean hydraulic oil on all cylinder<br />
parts to ease assembly.<br />
5. Slide rod assembly into cylinder tube.<br />
6. Mount steering cylinder in a vise with soft jaws. Secure<br />
head in barrel:<br />
A. Align retaining ring hole in the head with the access<br />
slot in the tube.<br />
B. Insert the retaining ring hook into the hole and rotate<br />
head clockwise until the retaining ring is completely<br />
pulled into the tube and the ring ends are<br />
covered.<br />
C. Apply silicone sealer to tube access slot.<br />
Hydraulic<br />
System<br />
Groundsmaster 4100--D<br />
Page 4 - 101<br />
Hydraulic System