Disassembly (Fig. 90)
Remove oil from steering cylinder into a drain pan by
slowly pumping the cylinder shaft. Plug both ports and
clean the outside of the cylinder.
Assembly (Fig. 90)
1.
1. Make sure all cylinder components are clean before
assembly.
2.
Coat new seal kit components with clean hydraulic
IMPORTANT: Prevent damage when clamping the
cylinder in a vise; clamp on the clevis only. Do not
close vise enough to distort the barrel.
oil.
A. Install new seals and O--rings to the piston.
B. Install new seals, O--ring and back--up seal to the
head.
2.
ing on the clevis end of the barrel. Use of a vise with soft
jaws is recommended.
Mount steering cylinder securely in a vise by clamp-
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
ing in a vise.
3.
Loosen head from barrel:
A. Use a spanner wrench to rotate head clockwise
until the edge ofthe retaining ring appears in the bar-
rel opening.
3.
vis of the shaft.
Mountshaftsecurelyinavisebyclampingonthecle-
A. Coat shaft with clean hydraulic oil.
B. Insert a screwdriver under the beveled edge of
the retaining ring to start the retaining ring through
the opening.
B. Carefully slide head and piston onto the shaft.
Secure piston to shaft with lock nut.
C. Rotatetheheadcounter--clockwisetoremovere-
taining ring from barrel and head.
C. Torque lock nut from 30 to 36 ft--lb (41 to 48
N--m).
4.
ing and pulling on the shaft.
Extract shaft with head and piston by carefully twist-
4.
ly slide shaft assembly into cylinder barrel.
Lubricate head and piston withhydraulic oil.Careful-
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
ing in a vise.
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.
vis of the shaft. Remove lock nut and piston from the
shaft. Slide head off the shaft.
Mountshaftsecurelyinavisebyclampingonthecle-
5.
cure head in barrel:
Mount steering cylinder in a vise with soft jaws. Se-
A. Align retaining ring hole in the head with the ac-
cess slot in the barrel.
6.
piston and the head.
Remove and discard all seals and O--rings from the
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.
7.
pressed air. Do not wipe parts dry with paper towels or
cloth. Lint in a hydraulic system will cause damage.
Wash parts in clean solvent. Dry parts with com-
8.
Carefully inspect internal surface of barrel for dam-
C. Apply silicone sealer to barrel access slot.
age (deep scratches, out--of--round, etc.). Replace en-
tire cylinder if barrel is damaged. Inspect piston rod and
piston for evidence ofexcessive scoring, pitting or wear.
Replace any damaged parts.
Groundsmaster 4500--D/4700--D
Page 4 -- 109
Hydraulic System
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| Language | English |
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