Greensmaster 3150 Hydraulic SystemPage 4 -- 87
Disassembly (Figs. 64 and 65)
1. Remove the oil from the cylinder by slowly pumping
the cylindershaft while holdingthe cylinder overa drain
pan. Plug both ports and clean the outside of the cylin-
der.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise; clamp on the cap end
only. Do not close vise enough to distort the barrel.
2. Mount lift cylinder in a vise. Use of a vise with soft
jaws is recommended.
3. Using aspanner wrench, rotate headclockwise until
theedgeoftheretainingringappearsinthebarrelopen-
ing. Insert a screwdriver under the beveled edge of the
retainingringtostarttheretainingringthroughtheopen-
ing. Rotate the head counter--clockwise to remove re-
taining ring from barrel and head.
4. 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.
5. Mountshaftsecurelyinavisebyclampingonthecle-
vis or eye of the shaft. Remove lock nut andpistonfrom
theshaft.Slideheadofftheshaft.
6. Remove wear ring and seal with loader from the pis-
ton. RemoveO--ring, back --up ring,seal and wiperfrom
the head. Remove O--ring from rod.
CAUTION
Useeye protectionsuchasgoggleswhenusing
compressed air to dry cylinder parts.
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.).Inspect shaft,
head and piston for evidence of excessive scoring, pit-
ting or wear. Replace entire cylinder if internal compo-
nents are found to be worn or damaged.
Assembly (Figs. 64 and 65)
1. Make sure all parts are clean before reassembly.
2. Coat new seal kit components with clean hydraulic
oil.
A. Install wear ring and seal with loader on the pis-
ton.
B. InstallO--ring,back--upringandsealonthehead.
C. Install O--ring to groove in rod.
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
inginavise.
3. Mountshaftsecurelyinavisebyclampingonthecle-
visor eyeof theshaft. Useof avisewithsoft jaws isrec-
ommended.
A. Coat shaft with clean hydraulic oil.
B. Carefully slide head onto the shaft. Install wiper
onto shaft and into head.
C. Install piston and nut onto the shaft. Torque nut
from 60 to 75 ft--lb (82 to 101 N--m).
D. Remove shaft from the vise.
IMPORTANT: Prevent damage when clamping the
hydraulic cylinder into a vise; clamp onthe cap end
only. Do not close vise enough to distort the barrel.
4. Mount barrel in a vise.
5. Coat all internal parts with a light coat of clean hy-
draulic oil. Slide piston, shaft and head assembly into
the barrel being careful not to damage the seals.
6. Secure head in barrel by installing retaining ring.
Align retaining ring hole in the head with the access slot
in the barrel. Insert the retaining ring hook into the hole
androtateheadclockwiseuntiltheretainingringiscom-
pletelypulledintothebarrelandtheringendsarecover-
ed.
Hydraulic
System
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