Toro Greensmaster 3250-D 04383, Service Manual

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Greensmaster 3250--D Hydraulic System (Rev. I) Page 4 -- 87
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 vice. Remove internal 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 vice.
4. Mount shaft securely in a vise by clamping on the cle-
vis of the shaft. Remove lock nut and piston from the
shaft. Slide head off the shaft.
5. Remove Uni--ring and O--ring from the piston. Re-
move O--ring, back--up ring, rod seal, and dust seal from
the head.
Reassembly
1. Make sure all parts are clean before reassembly.
2. Coat new O--rings, Uni--rings, rod seal, back--up
ring, and dust seal with with clean hydraulic oil.
A. Install Uni--ring and O--ring to the piston.
B. Install dust 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-
ing in a vice.
3. Mount shaft securely in a vise by clamping on the cle-
vis of the shaft.
A. Coat shaft with with clean hydraulic oil.
B. Slide head onto the onto the shaft. Install rod seal
onto shaft and into head.
C. Install piston and nut onto the shaft. Torque nut
from 24 to 30 ft--lb (33 to 41 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 vice.
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. Clean threads of internal collar and threads in cylin-
der barrel. Apply medium strength thread locking com-
pound (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.
Hydraulic System