Swing Hub (Sn 0300087000 Through 0300137452); Adjustment Procedures; Disassembly - JLG 600A Service And Maintenance Manual

3.11 SWING HUB (SN 0300087000 THROUGH
0300137452)

Adjustment Procedures

NOTE: The swing bearing high spot is usually marked with a col-
ored paint.
1. Ensure swing drive is located on bearing gear max
eccentric tooth (high spot).
2. With mounting free to slide, shim between pinion and
bearing gear teeth to achieve 0.008 - 0.012 in. (0.20 -
0.30 mm) backlash.
3. Install a pry bar into hole in turntable base plate and pry
swing hub back tight against shim and bearing.
4. Torque bolts according to the torque chart in Section 1.

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
cover (3).
3121201
Figure 3-46. Swing Torque Hub Adjustment
EYE PROTECTION SHOULD BE WORN DURING RETAINING RING (1I) REMOVAL.
NOTE: If bearing replacement is necessary, the bearing cups can
WHEN REBUILDING OR REPAIRING THE UNIT, THE RETAINING RING (1I), O-
RINGS (5) AND SEAL (1B) SHOULD ALWAYS BE REPLACED.
SECTION 3 - CHASSIS & TURNTABLE
7. Remove the retaining ring (1I) from the output shaft (1A)
and discard.
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
automatically removed during this procedure.
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). 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
carrier (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).
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