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Groundsmaster 4100--D/4110--D Hydraulic SystemPage 4 -- 135
Disassembly (Figs. 105 and 106)
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 in a vise; clamp o n the clevis only.
2. Mount lift cylinder securely in a vise by clamping on
the clevis end of the barrel. Use of a vise with soft jaws
is recommended.
3. For front deck lift cylinder, use a spanner wrench to
loosen and remove internal collar (item 2 in Fig. 105)
from barrel.
4. For wing deck lift cylinder, loosen head from barrel as
follows:
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.
5. 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.
6. Mount shaft securely in a vise by clamping on the cle-
vis of the shaft. Remove lock nut and then slide piston
and head offthe shaft.For front deck lift cylinder, remove
internal collar from shaft.
7. Remove and discard all seals and O--rings from the
piston and the head.
CAUTION
Use eye protection such as goggles when using
compressed air
8. Wa sh 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.
9. Carefully inspect internal surface of barrel for dam-
age (deep scratches, out--of--round, etc.). Inspect piston
rod and piston for evidence of excessive scoring, pitting
or wear. Replace lift cylinder if internal components are
found to be worn or damaged.
Assembly (Figs. 105 and 106)
1. Make sure all lift cylinder components are clean be-
fore assembly.
2. Coat new seal kit components with clean hydraulic
oil.
A. Install new seals and O--rings to the piston.
B. Install new seals, O--ring and back--up ring to the
head.
IMPORTANT: Do not clamp vise jaws against the
shaft surface.
3. Mount shaft securely in a viseby clamping on the cle-
vis of the shaft.
A. Coat shaft with clean hydraulic oil.
B. For front deck lift cylinder, slide internal collar
onto shaft.
C. Carefully slide head and piston onto the shaft.
Secure piston to shaft with lock nut.
D. Torque lock nut to specification in Figure 105
(front deck lift cylinder) or Figure 106 (wing deck lift
cylinder).
4. Lubricate head and piston with clean hydraulic oil.
Carefully slide shaft a ssembly into cylinder barrel.
IMPORTANT: Prevent damage when clamping the
cylinder ’s barrel into a vise; clamp on the clevis
only.
5. Mount lift cylinder in a vise with soft jaws by clamping
on the clevis end of the barrel.
6. For front deck lift cylinder, use a spanner wrench to
install and tighten internal collar (item 2 in Fig. 105) into
barrel.
7. For wing deck lift cylinder, secure head in barrel as
follows:
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.
C. Apply silicone sealer to barrel access slot.
Hydraulic
System