Swing Motor (Prior To S/N 0030000960); Removal; Disassembly - JLG T500J Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

3.13 SWING MOTOR (PRIOR TO S/N 0030000960)

NOTE: This motor may also be used on some machines manufac-
tured between S/N 0030000960 to 0030001050.

Removal

1. Remove the hardware securing the motor to the swing
drive.
2. Lift the motor up to gain access to the hydraulic lines
and tag and disconnect the lines running to the motor.
Cap or plug all openings.
*
* Secure this end of the shaft when removing the swing motor. If it starts
to pull out with the swing motor it could damage the internal seals.
Figure 3-17. Swing Motor- Removal

Disassembly

NOTE: Before disassembling the motor, it is highly recommended
that paint or a marker be used to make a V shaped set of
lines from the end cover to the housing to aid in proper
assembly. It is also important that the steps involving tim-
ing be followed carefully to insure proper motor operation.
1. Remove all shaft related components from the shaft (i.e.
keys, wire rings, nuts). To aid in assembly of the motor,
make a V shaped set of lines from the end cover to the
housing using either paint or a marker.
2. With the shaft facing down, secure the motor in a vise by
clamping onto the housing.
3. Loosen and remove the bolts holding the motor assem-
bly together.
4. Remove the end cover.
5. Remove the body seal and discard the seal.
6. Remove the rotor assembly and wear plate. Remove the
body seals from the rotor and housing and discard the
seals.
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7. Remove the drive link pin and drive link from the motor
8. Gently tap the shaft upward through the housing and
9. Remove the housing from the vise and turn over. Pry the
10. Push the seal carrier, thrust washer, and thrust bearing
NOTE: When removing the seal carrier, thrust washer, and thrust
11. If a new seal carrier and thrust washer are included in
12. Remove the wire ring, metal backup shim, and high
Swing Motor
13. All parts should be cleaned in an oil based solvent and
MAE31640
and lay aside.
remove through the rear of the housing. Turn the shaft
over and remove the cooling plug.
dust seal from the housing.
down and remove from the rear of the housing.
bearing take care not to scratch or nick the housing bore.
the repair kit, the old items may be discarded. If not,
carefully pry the shaft seal, teflon backup seal, and metal
backup shim from the seal from the seal carrier and dis-
card the metal backup shim, backup seal, and shaft seal.
Lay the seal carrier aside.
pressure seal from the inner bore groove of the housing
with a small screwdriver and discard them.
dried using compressed air. All new seals should be
lightly coated in clean oil prior to installation.
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