Greensmaster 3250--D Hydraulic SystemPage 4 -- 8 7
Disassembly
1. Removeoilfromliftcylinderintoadrainpanbyslowly
pumping the cylinder shaft. Plug both ports and clean
the outside of the cylinder.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise; clamp on the clevis
only. Do not close vise enough to distort the barrel.
2. Mountliftcylinderinavisewithsoftjaws.Removein-
ternal collar with a spanner wrench.
3. Extract shaft, head and piston by carefully twisting
and pulling on the shaft.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
ing in a vise.
4. Mount shaft securely in a vise with soft jaws b y
clampingontheclevisoftheshaft.Removelocknutand
piston from the shaft. Slide head off the shaft.
5. Remove T sealandO--ring from the piston.Remove
O--ring, back--up ring, rod seal and dust seal from the
head.
CAUTION
Useeyeprotectionsuch asgoggleswhenusing
compressed air to dry cylinder parts.
6. Wash cylinder parts in clean solvent. Dry parts with
compressedair.Donotwipepartsdrywithpaperorcloth
towels.Lint from towelsin a hydraulic system willcause
damage.
7. Carefully inspect internal surface of barrel for dam-
age (deep scratches, out--of--round, etc). Inspect rod,
head and piston for evidence of excessive scoring, pit-
ting or wear. Replace lift cylinder if internal components
are damaged.
Assembly
1. Make sure all lift cylinder parts are clean before as-
sembly.
2. CoatnewO--rings,Tseal,rodseal,back--upringand
dust seal with clean hydraulic oil.
A. Install T seal and O--ring to the piston.
B. Install rod 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-
inginavise.
3. Mount shaft securely in a vise with soft jaws by
clamping on the clevis of the shaft.
A. Coat shaft with with clean hydraulic oil.
B. Slideheadontotheshaft.
C. Install piston and nut onto the shaft. Torque nut
from 40 ft--lb (54 N--m).
D. Remove shaft from the vise.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise; clamp on the clevis
only. Do not close vise enough to distort the barrel.
4. Mountbarrelinavisewithsoftjaws.
5. Coat all internal cylinder parts with a light coat of
clean hydraulic oil. Slide piston, shaft and head assem -
blyintothebarrelbeingcarefulnottodamagetheseals.
6. Clean threads of internal collar and cylinder barrel.
Apply medium strength thread locking compound (e.g.
Loctite #242) to threads of internal collar. Secure head
inthe barrelwithinternalcollarusingaspannerwrench.
Tighten collar until snug and the outer end of the collar
isflushwithendofthebarrel.
Hydraulic
System
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