Toro Reelmaster 3550-D Service Manual page 167

Disassembly − Retaining Ring Style (Fig. 86)
1. Remove oil from the lift cylinder into a drain pan by
slowly pumping the cylinder rod. Plug both ports and
clean the outside of the cylinder.
IMPORTANT: Prevent damage when clamping the
cylinder in a vise; clamp on the clevis only.
2. Mount lift cylinder securely in a vise by clamping on
the clevis end of the barrel. Use of a vise with soft jaws
is recommended.
3. Loosen head from barrel:
A. Use a spanner wrench to rotate head clockwise
until the edge of the retaining ring appears in the bar-
rel opening.
B. Insert a screwdriver under the beveled edge of
the retaining ring to start the retaining ring through
the opening.
C. Rotate the head counter−clockwise to remove re-
taining ring from barrel and head.
4. Remove plugs from ports. Extract rod, head and pis-
ton assembly from barrel by carefully twisting and pull-
ing on the rod.
IMPORTANT: Do not clamp vise jaws against the
rod surface. Clamp on the clevis ONLY.
5. Mount rod securely in a vise by clamping on the cle-
vis of the rod. Remove lock nut from the rod. Slide piston
and head off the rod.
6. Remove wear ring, seals, back−up ring and O−rings
from the piston and head.
Reelmaster 3550−D/3555−D/3575−D
Assembly − Retaining Ring Style (Fig. 86)
1. Make sure all lift cylinder components are clean be-
fore assembly.
2. Coat new wear ring, O−rings, seals and back−up ring
with clean hydraulic oil.
A. Install wear ring and seal to the outside of the pis-
ton.
B. Install O−ring to inner bore of piston.
C. Install O−ring, back−up ring and rod seals to the
cylinder head.
IMPORTANT: Do not clamp vise jaws against the
rod surface. Clamp on the clevis ONLY.
3. Mount rod securely in a vise by clamping on the cle-
vis of the rod.
A. Coat rod with a light coat of clean hydraulic oil.
B. Carefully slide head assembly and then piston
assembly onto the rod. Install lock nut onto the rod
and torque nut 40 ft−lb (54 N−m).
C. Remove rod assembly from the vise.
4. Coat all internal parts with a light coat of clean hy-
draulic oil. Slide piston, rod and head assembly into the
barrel being careful to not damage the seals.
IMPORTANT: Prevent damage when clamping the
cylinder's barrel into a vise; clamp on the clevis
only.
5. Mount lift cylinder in a vise with soft jaws. Secure
head in barrel:
A. Align retaining ring hole in the head with the ac-
cess slot in the barrel.
B. Insert the retaining ring hook into the hole and ro-
tate head clockwise until the retaining ring is com-
pletely pulled into the barrel and the ring ends are
covered.
C. Apply silicone sealer to barrel access slot.
Page 4 − 135 Hydraulic System