7
Disc Valve Hydraulic Motor
10 000 Series
Geroler Motors—Two Speed
Thrust Bearing
Thickest Washer
Thrust
Washers
Figure 14
Dust Seal
O-ring
Back-up Washer
Retainer
Seal Replacement
Figure 15
Quad
Ring
Seal
Torquing Sequence
Figure 16
5
3
1
8
6
4
2
7
Check all mating surfaces and replace any parts with scratches or
burrs that could cause leakage. Wash all metal parts in clean solvent
and blow them dry with compressed air. Do not wipe parts dry with
paper towels or cloth as lint in a hydraulic system will cause damage.
Check the keyway and chamfered area of the output shaft and remove
any nicks, burrs, or sharp edges that could damage the shaft seals
during reassembly.
Note: Always use new seals when reassembling hydraulic motors.
Refer to parts list 6-131 for seal kit part numbers, replacement parts,
and ordering information.
Important: During reassembly lubricate the new seals with a
petroleum jelly such as Vaseline
®
. Also lubricate all machined
surfaces and bearings with clean hydraulic fluid.
32 Re-clamp the bearing housing in a vise with the mounting flange
up (see Figure 11). Remember, use just enough clamping force to
hold the bearing housing securely while the output shaft and retainer
are reinstalled.
33 Install the bearing spacer.
34 Lubricate the output shaft with clean hydraulic fluid and insert it
into the bearing housing. Rotate it as it is inserted.
35 Install the thrust bearing and thrust washers. Install the thick
thrust washer first, then the thrust bearing, then the thin thrust washer.
36 Press the dust seal into the retainer. The metal side of the dust
seal must face the retainer (see Figure 15). If a press is not available
carefully tap the dust seal into the retainer with a plastic or rubber
hammer.
37 Install the quad ring seal and back-up washer as shown in
Figure 15.
38 Apply petroleum jelly to the 89 mm [3.50 in.] 0-ring and install it in
the groove in the retainer.
39 Lubricate the inner edge of the dust seal and quad ring seal with
petroleum jelly.
40 Slide the retainer over the output shaft onto the bearing housing.
Important: Do not damage the seals. Use an output shaft sleeve to
protect the seals if available.
41 Install the eight cap screws and tighten them to 34 Nm [300 lb-in].
Follow the screw torque sequence in Figure 16.
Reassembly
