Toro Greensmaster 3150 Service Manual page 129

Disassembly (Fig. 75)
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.
IMPORTANT: To prevent damage when clamping
cylinder barrel in a vise, clamp only on ball joint
location. Do not clamp the vise jaws against the cyl-
inder barrel or rod surface.
2. Mount cylinder in a vise by clamping vise on barrel
ball joint location of cylinder. Use of a vise with soft jaws
is recommended.
3. Remove both heads from the 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. Rotate the head counter--clockwise to
remove retaining ring from barrel and head.
C. Slide head from cylinder barrel and rod.
4. Grasp end of rod and use a twisting and pulling mo-
tion to carefully extract rod assembly (with piston) from
cylinder barrel.
NOTE: Piston (item 13) is not removable from cylinder
rod.
5. Remove and discard rod wipers (item 2), seals (item
3), O--rings (item 6), back--up rings (item 5) and wear
rings (item 7) from both heads (item 4). Also, remove
seal (item10), back--up ring (item 9) and wear ring (item
11) from piston.
CAUTION
Use eye protection such as goggles when using
compressed air to dry cylinder parts.
6. Wash cylinder parts in clean solvent. Dry parts with
compressed air. Do not wipe parts dry with paper or cloth
towels. Lint from towels in a hydraulic system will cause
damage.
7. Carefully inspect internal surface of barrel for dam-
age (deep scratches, out--of--round, etc). Inspect rod,
both heads and piston for evidence of excessive scor-
ing, pitting or wear. Replace entire steering cylinder if in-
ternal components are damaged.
Greensmaster 3150
Assembly (Fig. 75)
1. Identify components from seal kit that are to be used
in cylinder repair. Put a coating of clean hydraulic oil on
all new seals, back--up rings and O--rings.
2. Install new wear rings (item 7), seals (item 3), rod
wipers (item 2), back--up rings (item 5) and O--rings
(item 6) onto both heads (item 4). Position backup ring,
seal and wear ring to the piston (item 13).
IMPORTANT: During cylinder assembly, pay careful
attention to the retaining ring slots in the barrel to
insure that the piston and head seals do not lodge
in the slots.
3. Coat all internal cylinder parts with a light coat of
clean hydraulic oil. Carefully slide rod assembly into the
barrel being careful to not damage seals on piston.
4. Lubricate head (item 4) assemblies with clean hy-
draulic oil and carefully slide them onto rod and into bar-
rel.
5. Secure both heads to 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 - - 101 Hydraulic System