Toro Groundsmaster 4300-D Service Manual page 210

Disassembling the Lift Cylinder (continued)
Inspecting the Lift Cylinder
Assembling the Lift Cylinder
Hydraulic System: Service and Repairs
3. Use a spanner wrench, rotate the head clockwise until the edge of the
retaining ring (item 7 in
screwdriver under the beveled edge of the retaining ring to start the retaining
ring through the opening. Rotate the head counterclockwise to remove the
retaining ring from the barrel and head.
4. Remove the plugs from the ports. Carefully twist and pull the shaft and
remove the shaft with head and piston.
Clamping the vise jaws against the shaft surface could damage the
shaft. When securing the shaft in a vise, clamp the shaft clevis only.
5. Mount the shaft in a vise by clamping on the clevis of the shaft. Remove the
locknut and piston from the shaft. Carefully slide the head off the shaft.
Note: Do not scratch or damage the components.
6. Remove and discard all the seals, back-up rings, and O-rings from the head
and piston.
Use eye protection such as goggles when using compressed air.
1. Wash all the cylinder components in clean solvent and dry them with
compressed air.
2. Inspect the internal surface of the barrel for deep scratches, out-of-roundness,
and bending.
3. Inspect the head, shaft, and piston for excessive pitting, scoring, and wear.
4. Replace the lift cylinder if the internal components are worn or damaged.
1. Ensure that all the parts are clean before assembly.
2. Put a coating of clean hydraulic fluid on new O-rings, back-up washer, and
other seals. Carefully install new seals, back-up rings, and O-rings to the
head and piston.
Clamping the vise jaws against the shaft surface could damage the
shaft. When securing the shaft in a vise, clamp the shaft clevis only.
3. Mount the shaft in a vise by clamping on the clevis of the shaft, and do the
following steps:
A. Put a coating of clean hydraulic fluid on the shaft.
B. Slide the head onto the shaft.
Note: Ensure that you do not damage the seals.
Figure 114) appears in the barrel opening. Insert a
IMPORTANT
CAUTION
IMPORTANT
Page 4–148 Groundsmaster ® 4300-D
16226SL Rev C