JLG 680S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
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3.14 SWING HUB (PRIOR TO SN 0300134352)
Disassembly
1. Loosen all 12 cover bolts (12) & (13) and drain the oil
from the unit.
2. Remove the 12 cover bolts (12) & (13) and lift off the
cover (6). Remove and discard the o-ring (5) from the
counterbore of the cover (6).
3. Remove the input gear (8) and thrust washer (10).
4. Lift out the carrier assembly (3) and top thrust washer
(11). The thrust washer (11) may stick to the inside of the
carrier (3).
5. Remove the input thrust spacer (9).
6. Lift out the internal gear (2) and thrust washer (11). The
thrust washer (11) may stick to the under side of the car-
rier (3).
7. Remove the retaining ring (1I) from the output shaft (1A)
and discard.
EYE PROTECTION SHOULD BE WORN DURING RETAINING RING (1I) REMOVAL.
8. Remove bearing shim (1H) from the output shaft (1A).
9. The output shaft (1A) may now be pressed out of the
hub (1G).
10. The bearing cups (1C) & (1E) will remain in hub (1G) as
will bearing cone (1F). Bearing cone (1D) will remain on
the same output shaft (1A). The seal (1B) will be auto-
matically removed during this procedure.
NOTE: If bearing replacement is necessary, the bearing cups can
be removed with a slide hammer puller driven out with a
punch.
11. To remove the cluster gears (3F) from the carrier (3A),
drive the anti-roll pin (3G) into the planet shaft (3E) may
now be tapped out of the carrier. After planet shaft (3E)
has been removed the roll pin (3G) can be driven out.
12. The cluster gear (3F) can now be removed from the car-
rier (3A). The thrust washers (3B) will be removed with
the cluster gear (3F).
13. The needle rollers (3C) and spacer (3D) are now removed
from the cluster gear (3F).
WHEN REBUILDING OR REPAIRING THE UNIT, THE RETAINING RING (1I), O-
RINGS (5) AND SEAL (1B) SHOULD ALWAYS BE REPLACED.
Main Assembly Procedure
1. With the hub shaft sub-assembly resting on the shaft
(1A) install internal gear (2). The spline of the internal
gear (2) bore will mesh the spline of the output shaft
(1A).
2. Thrust washer (11) is installed on the face of the output
shaft (1A). Sufficient grease or petroleum jelly should be
used to hold thrust washer in place.