Toro 04384 Service Manual page 119

Disassembly
1. Remove oil from lift cylinder into a drain pan by slowly
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. Mount lift cylinder in a vise with soft jaws. Remove in-
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 by
clamping on the clevis of the shaft. Remove lock nut and
piston from the shaft. Slide head off the shaft.
5. Remove T seal and O--ring from the piston. Remove
O--ring, back--up ring, rod seal and dust seal from the
head.
CAUTION
Use eye protection such as goggles when using
compressed air to dry cylinder parts.
6. Wash cylinder parts in clean solvent. Dry parts with
compressed air. Do not wipe parts dry with paper or cloth
towels. Lint from towels in a hydraulic system will cause
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. Coat new O--rings, T seal, rod seal, back--up ring and
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.
Greensmaster 3250--D
IMPORTANT: Do not clamp vise jaws against the
shaft surface. Protect shaft surface before mount-
ing in a vise.
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. Slide head onto the shaft.
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. Mount barrel in a vise with soft jaws.
5. Coat all internal cylinder parts with a light coat of
clean hydraulic oil. Slide piston, shaft and head assem-
bly into the barrel being careful not to damage the seals.
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
in the barrel with internal collar using a spanner wrench.
Tighten collar until snug and the outer end of the collar
is flush with end of the barrel.
Page 4 - - 87 Hydraulic System