Upright AB46 C, Service & Parts Manual

Page: 32 / 148

Section
3-14 AB46 Work Platform
Maintenance
3.12
Figure 3-15: Drive Motor
8. Remove the retaining ring. Remove the shaft and
seal carrier with the seal.
9. Remove the O-ring from the seal carrier and re-
move the seal.
10. Remove small retaining ring and press the bearing
off the shaft.
Closely examine all parts for pitting and wear. If pistons
or cylinders are worn or pitted, replace cylinder block
assembly.
If needle bearing is to be replaced, remove needle
bearing using a puller. Press new bearing in place.
Bearing cage will protrude from end cap and serve as a
pilot for the valve plate.
Replace all Gaskets and O-rings. Lubricate O-rings using
petrolium jelly.
1. Retaining Ring
2. Seal Carrier
3. Lip Seal
4. O-Ring
5. Retaining Ring
6. Bearing
7. Shaft
8. Body
9. Gasket
10. Thrust Plate
11. Cylinder Kit
12. Valve Plate
13. Needle Bearing
14. End Cap
15. Pin
16. Cap Screw
17. Alignment
Sleeve
3.12 DRIVE MOTOR REMOVAL
1. Park the work platform on firm level ground.
2. Mark and remove the drive motor hydraulic lines.
Clean all fittings before disconnecting the
hose assemblies.
Plug all port holes and hose assemblies
IMMEDIATELY to prevent contamination
from dust and debris.
3. Remove the cap screws and washers which secure
the drive motor to the torque hubs. Remove the
drive motor.
Drive Motor Seal Replacement
NOTE: Refer to IPB section page 6-16 or 6-17 for
available repair parts.
DISASSEMBLY (Figure 3-15)
CAUTION: Safety glasses should be used
during disassembly of hub.
1. Remove four cap screws which secure end cap.
Remove end cap with valve plate. Do not allow
valve plate to fall off end cap.
2. Carefully remove valve plate. It may be necessary to
pry valve plate off with small screwdriver.
3. Remove the gasket.
4. Remove the alignment sleeves from housing.
5. Lay the motor on its side and remove cylinder block
assembly.
6. Remove slipper guide and piston assemblies from
cylinder block.
7. Using an O-ring pick, remove the thrust plate.