Shaft Seal Replacement; Speed Sensor Replacement - JLG 600A Service And Maintenance Manual

Shaft Seal Replacement

REMOVAL
1. Remove the snap ring (1) retaining the shaft seal and
support washer.
1
2
3
1. Snap Ring
2. Support Washer
3. Shaft Seal
Figure 3-44. Removing the Shaft Seal
2. Remove the support washer (2).
3. Carefully pry out the shaft seal (3). To avoid damaging
the shaft during removal, install a large sheet metal
screw into the chuck of a slide hammer. Drive the screw
into the seal surface and use the slide hammer to pull
the seal.
4. Discard the seal.
INSPECT THE COMPONENTS
Inspect the new seal, the motor housing seal bore, and the
sealing area on the shaft for rust, wear, and contamination.
Polish the shaft and clean the housing if necessary.
INSTALLATION
1. Cover the shaft splines with an installation sleeve to pro-
tect the shaft seal during installation.
2. Install a new shaft seal with the cupped side facing the
motor. Press seal into housing until it bottoms out. Press
evenly to avoid binding and damaging the seal.
3. Install seal support washer.
4. Install snap ring.
Remove the installation sleeve.
3121201
SECTION 3 - CHASSIS & TURNTABLE

Speed Sensor Replacement

REMOVAL
1. Disconnect the speed sensor electrical connector.
2. Using an 11/16 in. wrench, loosen the locknut.
3. Using a 1/2 in. wrench, remove the speed sensor and o-
ring from the motor.
Replacing the speed sensor
INSTALL THE NEW SPEED SENSOR
1. Turn speed sensor with O-ring in (CW) by hand until bot-
tom end gently touches the speed ring.
2. Back out speed sensor (CCW) 1/4 turn. Continue backing
out until the flats are 22 degree either side of the motor
shaft center line (20-30 degree is acceptable). Do not
back out more than 3/4 turn from touching bottom.
3. Using a 1/2 in. wrench to hold the speed sensor, torque
the lock nut to 10ft. lbs. (13 Nm) with an 11/16 in.
wrench.
4. Plug in electrical connection and start machine to test
for proper operation.
Lock nut
O-ring
3-53