Toro Reelmaster 3550-D Service Manual page 169

Disassembly − Threaded Collar 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. Use a spanner wrench to rotate internal collar coun-
terclockwise until it is free of the cylinder barrel.
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 rings, seals, back−up ring and
O−rings from the piston and head.
Reelmaster 3550−D/3555−D/3575−D
Assembly − Threaded Collar Style (Fig. 86)
1. Make sure all lift cylinder components are clean be-
fore assembly.
2. Coat new wear rings, O−rings, seals and back−up
ring with clean hydraulic oil.
A. Install backup rings and seal to outside of piston.
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 securely in a vise by clamping on
the clevis end of the barrel. Use of a vise with soft jaws
is recommended.
6. Use a spanner wrench to rotate internal collar clock-
wise until it is tight against the cylinder barrel.
Page 4 − 137 Hydraulic System