user manual

Groundsmaster 4100--D Hydraulic SystemPage 4 -- 133
Disassembly (Figs. 92 and 93)
1. Removeoilfromliftcylinderintoadrainpanbyslowly
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 on the clevis only. Do not
close vise enough to distort the barrel.
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. Loosen head from barrel:
A. Use a spanner wrench to rotate head clockwise
untiltheedgeoftheretainingringappearsinthebar-
rel opening.
B. Insert a screwdriver under the beveled edge of
the retaining ring to start the retaining ring through
the opening.
C. Rotatetheheadcounter--clockwisetoremovere-
taining ring from barrel and head.
4. Extract shaft with headand 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. Mountshaftsecurelyinavisebyclampingonthecle-
vis of the shaft. Remove lock nut and piston from the
shaft. Slide head off the shaft.
6. Remove and discard all seals and O--rings from the
piston and 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-
tirecylinder ifbarrel isdamaged. Inspectpiston rodand
pistonforevidenceofexcessivescoring,pittingorwear.
Replace any damaged parts.
Assembly (Figs. 92 and 93)
1. Make sure allcylinder components are cleanbefore
assembly.
2. Coat new seal kit components with c lean hydraulic
oil.
A. Install new seals and O--rings to the piston.
B. Install newseals, O--ring andback--upr ing tothe
head.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
ing in a vise.
3. Mountshaftsecurelyinavisebyclampingonthecle-
vis of the shaft.
A. Coat shaft with clean hydraulic oil.
B. Carefully slide head and piston onto the shaft.
Secure piston to shaft with lock nut.
C. TorquelocknuttospecificationinFigure92(front
deck cylinder) or Figure 93 (wing cylinder).
4. Lubricateheadandpistonwithhydraulicoil.Careful-
ly slide shaft assembly 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 in a vise with soft jaws. Secure
head in barrel:
A. Align retaining ring hole in the head with the ac-
cess slot in the barrel.
B. Insertthe retainingringhookintotheholeandro-
tate head clockwise until the retaining ring is com-
pletely pulled into the barrel and the ring ends are
covered.
C. Apply s ilicone sealer to barrel access slot.
Hydraulic
System