User manual

Groundsmaster 4000--D/4010--D Hydraulic SystemPage 4 -- 149
Disassembly (Figs. 115 and 116)
1. Removeoilfromliftcylinderintoadrainpanbyslowly
pumping the cylinder shaft. Plug both ports and clean
the outside of the cylinder.
IMPORTANT: Prevent damage when clamping t he
cylinder in a vise; clamp on 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. 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. Extractshaft with head and piston by carefully twist-
ing and pulling on the shaft.
IMPORTANT: Do not clamp vise jaws against the
shaft surface.
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(deepscratches,out--of--round,etc.).Inspectpiston
rodand pistonforevidence ofexcessive scoring,pitting
or wear. Replace lift cylinder if internal components are
found to be worn or damaged.
Assembly (Figs. 115 and 116)
1. Makesure all cylinder components are clean before
assembly.
2. Coat new seal kit components with clean hydraulic
oil.
A. Install new seals and O--rings to the p iston.
B. Installnew seals, O--ringand back--upring tothe
head.
IMPORTANT: Do not clamp vise jaws against the
shaft surface.
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. Torque lock nut to specification in Figure 115
(side deck cylinder) or Figure 116 (front deck cylin-
der).
4. Lubricate head and piston with clean hydraulic oil.
Carefully slide shaft assembly into cylinder barrel.
IMPORTANT: Prevent damage when clamping t he
cylinder’s barrel into a vise; clamp on the clevis
only.
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. Inserttheretainingringhookintotheholeandro-
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