Disassembly (Fig. 89)
Remove oil from lift cylinder by slowly pumping the
Assembly (Fig. 89)
1.
1. Make sure all parts are clean before assembly.
cylinder shaft.Afterremovingoilfromcylinder,plugboth
ports and clean the outside of the cylinder.
2.
ring, wear rings and dust seal with clean hydraulic oil.
Coat new O--rings, piston seal, rod seal, back--up
IMPORTANT: Prevent damage when clamping the
cylinder’s barrel into a vise; clamp on the barrel cle-
vis only. Do not close vise on barrel.
A. Installpistonseal,wearringandO--ringtothepis-
ton.
B. Install back--up ring, O--ring, shaft seal, wear ring
and dust seal to the head.
2.
by clamping on the barrel clevis.
Mount lift cylinder in a vise equipped with soft jaws
IMPORTANT: When securingshaftinvise,clampon
shaft clevis only. Do not clamp vise jaws against the
shaft surface.
3.
from barrel.
Use a spanner wrench to loosen and remove collar
4.
fully twisting and pulling on the shaft.
Extract shaft with head, cushion and piston by care-
3.
Mount shaft securely in a vise equipped with soft
jaws by clamping on the shaft clevis.
IMPORTANT: When securingshaftinvise,clampon
shaft clevis only. Do not clamp vise jaws against the
shaft surface.
A. Coat shaft with clean hydraulic oil.
B. Slide external collar, head, cushion and piston
onto the shaft.
5.
Mountshaftsecurelyinavisebyclampingonthecle-
vis of the shaft. Remove lock nut from the shaft. Slide
shaft, cushion and head off the shaft.
C. Secure piston to shaft with lock nut. Torque lock
nut to 130 ft--lb (176 N--m).
6.
piston. Remove O--ring, back--up ring, dust seal, wear
ring and shaft seal from the head.
Remove piston seal, wear ring and O--ring from the
4.
draulic oil. Slide shaft assembly carefully into cylinder
barrel.
Lubricate head, cushion and piston with clean hy-
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-
IMPORTANT: Prevent damage when clamping the
cylinder’s barrel into a vise; clamp on the barrel cle-
vis only. Do not close vise on barrel.
8.
Carefully inspect internal surface of barrel for dam-
5.
by clamping on the barrel clevis.
Mount lift cylinder in a vise equipped with soft jaws
age (deep scratches, out--of--round, etc.). Replace en-
tire cylinder if barrel is damaged. Inspect shaft and
piston for evidence ofexcessive scoring, pitting or wear.
Replace any damaged parts.
6.
Use a spanner wrench to tighten collar onto barrel.
Groundsmaster 5900/5910
Page 4 -- 123
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Document Type | Service Manual |
| Language | English |
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