Toro Groundsmaster 4100-D Service Manual page 143

Disassembly (Fig. 79)
1. Remove oil from lift cylinder into a drain pan by slowly
pumping the cylinder shaft. Plug both ports and clean
the outside of the cylinder.
IMPORTANT: Prevent damage when clamping the
cylinder's barrel into a vise; clamp on the clevis
only. Do not close vise enough to distort the barrel.
2. Mount lift cylinder into a vise. Use of a vise with soft
jaws is recommended.
3. 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.
4. Extract shaft with head and piston by carefully twist-
ing and pulling on the shaft.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
ing in a vise.
5. 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 off the shaft.
6. Remove T--seal, o--ring, and wear ring from the pis-
ton. Remove O--ring, back--up ring, rod seal, and dust
seal from the head.
7. Wash parts in clean solvent. Dry parts with com-
pressed air. Do not wipe parts dry with paper towels or
cloth. Lint in a hydraulic system will cause damage.
8. Carefully inspect internal surface of barrel for dam-
age (deep scratches, out--of--round, etc.). Replace en-
tire cylinder if barrel is damaged. Inspect piston rod and
piston for evidence of excessive scoring, pitting, or
wear. Replace any damaged parts.
Groundsmaster 4100--D
Assembly (Fig. 79)
1. Make sure all parts are clean before reassembly.
2. Coat new O--rings, T--seal, wear ring, rod seal,
back--up ring, and dust seal with clean hydraulic oil.
A. Install T--seal, wear ring, and O--ring to the piston.
B. Install dust seal, O--ring, back--up ring, and dust
seal to the head.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
ing in a vise.
3. Mount shaft securely in a vise by clamping on the cle-
vis of the shaft.
A. Coat shaft with clean hydraulic oil.
B. Slide head and piston onto the shaft. Secure pis-
ton to shaft with locknut.
4. Lubricate head and piston with hydraulic oil. Slide
shaft assembly carefully into cylinder barrel.
IMPORTANT: Prevent damage when clamping the
cylinder's barrel into a vise; clamp on the clevis
only. Do not close vise enough to distort the barrel.
5. Mount lift cylinder into a vise. Secure head in barrel
with retaining ring.
A. Align retaining ring hole in the head with the ac-
cess slot in the barrel.
B. Insert the retaining ring hook into the hole and ro-
tate head clockwise until the retaining ring is com-
pletely pulled into the barrel and the ring ends are
covered.
Rev. E
Page 4 - - 101 Hydraulic System