Toro Groundsmaster 1200 Service Manual page 66

Disassembly of the Cutting Unit Lift Cylinder (continued)
Assembly of the Cutting Unit Lift Cylinder
Hydraulic System: Service and Repairs
Prevent damage when clamping the cylinder's barrel into a vise;
clamp on the barrel clevis only. Do not close vise on barrel.
2. Mount the lift cylinder in vise equipped with the soft jaws by clamping in
the barrel clevis.
3. Remove the 2 set screws from the collar and remove the collar from the
cylinder barrel.
4. Extract shaft assembly (7) with head (8) and piston (2) by carefully twisting
and pulling the shaft.
When securing shaft in a vise, clamp on the shaft clevis only. Do not
clamp vise jaws against the shaft surface.
5. Mount shaft securely in a vise by clamping on the clevis of the shaft. Remove
the lock nut (1) from the shaft. Slide the shaft and head off the shaft.
6. Remove the piston seal (4), and O-rings (3 and 5) from the piston (2).
Remove the O-ring (9), back-up ring (10), dust seal (13), square O-ring (14)
and BT seal (12) from the head (8).
7. Wash parts in clean solvent. Dry parts with compressed air. Do not wipe parts
dry with paper towels or cloth. Lint in a hydraulic system will cause damage.
8. Carefully inspect the internal surface of barrel for damage (deep scratches,
out-of-round, etc.). Replace entire cylinder if any parts (other than seals)
are damaged.
1. Ensure that all parts are clean before assembly.
2. Coat new O-rings, pistons seal, rod seal, back-up ring and dust seal with
clean hydraulic oil:
A. Install the piston seal (4), and O-rings (3 and 5) to the piston (2).
B. Install the back-up ring (10), BT seal (12), O-ring (9) and dust seal (13)
to the head (8).
When securing the shaft in vise, clamp on the shaft clevis only. Do
not clamp vise jaws against the shaft surface.
3. Mount shaft securely in a vise equipped with soft jaws by clamping on the
shaft clevis:
A. Coat shaft with clean hydraulic oil.
B. Slide external collar (11), head assembly (8) and piston assembly onto
the shaft.
IMPORTANT
IMPORTANT
IMPORTANT
Page 4–12 Groundsmaster® 1200 Pull-Behind Rotary Mower
18235SL Rev A