Disassembling the Polar Trac Lift Cylinder (continued)
IMPORTANT
When you clamp the lift cylinder in a vise, clamp the clevis end of
the cylinder head only to prevent damage.
2. Mount the lift cylinder correctly in a vise by clamping the clevis end of the
cylinder head. Use a vise equipped with soft jaws.
3. Use a spanner wrench, rotate the head clockwise until the edge of the
retaining ring appears in the cylinder head opening. Insert a 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 cylinder head (item 2 in
) and head.
4. Remove the plugs from the ports. Carefully twist and pull the shaft and
remove the shaft with head and piston.
IMPORTANT
Clamping the vise jaws against the rod surface could damage the
rod. When securing the rod in a vise, clamp the rod clevis only.
5. Mount the rod correctly in a vise by clamping on the clevis of the rod. Remove
the locknut and piston from the rod. Carefully slide the head off the shaft.
6. Remove the cap seal and O-ring from the piston. If necessary, remove the
wear ring from the piston.
Note:
Do not scratch or damage the piston.
7. Remove the O-ring, back-up ring, wiper, and seal from the head.
Note:
Do not scratch or damage the head.
Inspecting the Polar Trac Lift Cylinder
CAUTION
Use eye protection such as goggles when using compressed air.
1. Wash all the lift cylinder components in clean solvent and dry them with
compressed air.
2. Inspect the internal surface of the cylinder head for deep scratches,
out-of-roundness, and bending.
Note:
Replace the cylinder head if it is worn or damaged.
3. Inspect the head, shaft, and piston for excessive pitting, scoring, and wear.
Note:
Replace the parts if they are worn or damaged.
Assembling the Polar Trac Lift Cylinder
1. Ensure that all the lift cylinder parts are clean before assembly.
2. Put a coating of clean hydraulic fluid on new O-rings, back-up ring, and other
seals, and do the following steps:
A. Carefully install the cap seal and O-ring to the piston. If removed, install
the wear ring on the piston.
Hydraulic System: Service and Repairs
Page 4–132
Groundsmaster 7210
16222SL Rev C
Summary of Contents for Groundsmaster 7210
Page 4: ...NOTES Revision History Page 4 Groundsmaster 7210 16222SL Rev C...
Page 32: ...Specifications and Maintenance Special Tools Page 2 16 Groundsmaster 7210 16222SL Rev C...
Page 60: ...Diesel Engine Service and Repairs Page 3 28 Groundsmaster 7210 16222SL Rev C...
Page 196: ...Hydraulic System Service and Repairs Page 4 136 Groundsmaster 7210 16222SL Rev C...
Page 304: ...Chassis Service and Repairs Page 6 42 Groundsmaster 7210 16222SL Rev C...
Page 327: ...Drawing 105 7260 Rev E Sheet 1 16222SL Rev C Page A 3 Hydraulic Schematic g186843...
Page 328: ...Page A 4 16222SL Rev C Drawing 119 4372 Rev C Sheet 1 Electrical Schematic Platform g186842...
Page 329: ...Drawing 119 4377 Rev C Sheet 1 16222SL Rev C Page A 5 Electrical Schematic Engine g186841...
Page 336: ...Page A 12 16222SL Rev C Drawing 119 4386 Rev A Sheet 1 Wire Harness Drawing Cab Power g186851...
Page 342: ......
