Toro Greensmaster 3150 Service Manual page 107

Disassembly
IMPORTANT: To prevent damage when clamping
cylinder barrel in a vise, clamp only on pivot end. Do
not clamp the vise jaws against the shaft surface.
1. Pump oil out of cylinder into a drain pan by slowly
moving rod in and out of cylinder bore. Plug ports and
clean outside of cylinder.
2. Mount cylinder in a vise by clamping vise on center
mounting location of cylinder. Do not close vise so firmly
that cylinder barrel could become distorted.
3. Loosen set screws and remove threaded cap from
each end of the cylinder barrel.
4. Grasp end of rod and use a twisting and pulling mo-
tion to carefully extract rod assembly and head from cyl-
inder barrel. Remove head from other end of barrel.
5. Loosen set screws that secure piston to shaft and
carefully remove piston. Slide head and threaded cap
from shaft.
6. Remove and discard all seals, back–up rings,and O–
rings from both heads and piston.
7. Wash parts in clean solvent. Dry parts with com-
pressed air. Do not wipe parts dry with paper towels or
cloth. Lint in a hydraulic system will cause damage.
8. Carefully inspect internal surface of barrel for dam-
age (deep scratches, out–of–round, etc.). Replace en-
tire cylinder if barrel is damaged. Inspect shaft, both
heads, and piston for evidence of excessive scoring, pit-
ting, or wear. Replace any damaged parts.
Greensmaster 3150
Assembly
1. Use a complete repair kit when rebuilding the cylin-
der. Put a coating of clean hydraulic oil on all new seals,
back–up rings, and O–rings.
2. Install new u–cup, rod wiper, back up ring, and o–ring
onto each head. Position two o–rings (inner and outer),
piston ring, and both wear rings to the piston.
3. Lubricate shaft with clean hydraulic oil. Slide
threaded cap, head, and piston onto shaft. Install thread
locker on set screw threads and tighten two set screws
to secure piston to shaft.
4. Put a coating of clean hydraulic oil on all cylinder
parts to ease assembly.
5. Slide shaft assembly into cylinder barrel. Slide sec-
ond head assembly into open end of barrel.
6. Install and tighten threaded caps. Secure both caps
to barrel with set screws.
Page 4 – 83 Rev. C
Hydraulic System