JLG 680S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-74 3121234
Shaft Seal Replacement
REMOVAL
1. Remove the snap ring (1) retaining the shaft seal and
support washer.
2. Remove the support washer (2).
3. Carefully pry out the shaft seal (3).
NOTE: 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 ham-
mer 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. Pol-
ish 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.
5. Remove the installation sleeve.
1
2
3
1. Snap Ring
2. Support Washer
3. Shaft Seal
Figure 3-59. Removing the Shaft Seal