Lift Cylinder Service - Toro Workman HDX Auto Service Manual

Lift Cylinder Service

60 to 75 ft−lb
(81 to 102 N−m)
1
1. Lock nut
2. Wear ring
3. Seal
4. O−ring
5. Piston
Disassembly (Fig. 45)
1. Pump oil out of cylinder into a drain pan by slowly
moving piston back and forth.
2. Before disassembling cylinder, plug ports, wash ex-
terior with cleaning solvent and dry thoroughly.
IMPORTANT: Prevent damage when clamping the
cylinder's barrel into a vise; clamp on the clevis
only. Do not close vise on barrel.
3. Mount lift cylinder in a vise equipped with soft jaws by
clamping on the barrel clevis.
4. Remove retaining ring that secures head in barrel.
A. Use a spanner wrench to rotate head clockwise
until the edge of the retaining ring appears in the bar-
rel opening.
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 re-
taining ring from barrel and head.
Hydraulic System
2 3 4 5
14 13
Figure 45
6. Head
7. O−ring
8. Back−up seal
9. Retaining ring
10. Seal
Page 7 − 56
6 7 8 9
12
11. Wiper
12. Barrel
13. Shaft
14. O−ring
5. Extract shaft with head and piston by carefully twist-
ing and pulling on the shaft.
IMPORTANT: When securing shaft in vise, clamp on
shaft clevis only. Do not clamp vise jaws against the
shaft surface.
6. Mount shaft securely in a vise by clamping on the cle-
vis of the shaft. Remove lock nut and piston from the
shaft. Slide head from the shaft.
7. Remove piston seal, O−rings and wear ring from the
piston. Remove O−ring, back−up seal, seal and wiper
from the head.
Inspection
1. Wash parts in clean solvent. Dry parts with com-
pressed air. Do not wipe parts dry with paper towels or
cloth. Lint in the hydraulic system will cause damage.
2. Carefully inspect internal surface of barrel for dam-
age (deep scratches, out−of−round, etc.).
3. Inspect shaft and piston for evidence of excessive
scoring, pitting or wear.
4. Replace lift cylinder if internal components are found
to be worn or damaged.
10 11
Workman HDX Auto