JLG 150HAX Service Manual - Manual (Page 40)

SECTION 3 - CHASSIS & TURNTABLE
3-2 – JLG Lift – 3120817
3. The tightening of the nuts should be done in stages.
Following the recommended sequence, tighten nuts
per wheel torque chart.
4. Wheel nuts should be torqued after first 50 hours of
operation and after each wheel removal. Check
torque every 3 months or 150 hours of operation.
3.2 DRIVE TORQUE HUB
Disassembly
1. Position hub over suitable container and remove
drain plug (37) from unit. Allow oil to completely
drain.
2. Remove sixteen bolts (1), four shoulder bolts (2),
and twenty lockwashers (3) from cover (4) and lift
cover from unit. Remove o-ring (14) from counter-
bore of cover.
3. Disassemble cover (4) as follows:
a. Remove two bolts (12) securing disconnect cap
(11) to cover and remove disconnect cover.
b. Remove two bolts (12) securing cover cap (7) to
cover and remove cap.
c. Remove disconnect rod (9) from cover cap and
remove o-rings (8 and 10) from cover cap. Dis-
card o-rings.
d. If necessary, remove pipe plugs (5 and 6) from
cover.
4. Remove two thrust washers (15) and thrust bearing
(16) from carrier counterbore. One thrust washer
may stick to cover. Inspect thrust washers and bear-
ing for wear and replace if necessary.
5. Lift carrier assembly (22) from hub and spindle
assembly (30).
6. Disassemble carrier as follows:
EYE PROTECTION SHOULD BE WORN DURING RETAINING RING
REMOVAL.
a. Remove retaining ring (25) from planet shaft
(23).
b. Remove spacer (26) from planet shaft, then,
using a suitable drift, drive planet shaft from car-
rier, shearing off roll pin. Tap remaining roll pin
from carrier using a suitable punch.
c. Remove cluster gear (27) from carrier and
remove bearing cones (29) from cluster gear.
d. If necessary, press bearing cups (28) from clus-
ter gear.
7. Lift ring gear (13) from housing (36). Remove o-ring
(14) from counterbore of ring gear and discard.
8. Remove input (sun) gear (17), input spacer (18), and
input shaft (20) from spindle (30).
9. Remove two thrust washers (15) and thrust bearing
(16) from end of spindle. One thrust washer may
stick in carrier counterbore. Inspect thrust washers
and thrust bearing for wear and replace if necessary.
10. Lift internal gear (21) out of hub.
EYE PROTECTION SHOULD BE WORN DURING RETAINING RING
REMOVAL.
11. Remove keeper ring (40), retaining ring (35), and
bearing shim (34) from end of spindle. Remove hub
from spindle.
12. Remove bearing cone (32) and seal (31) from spin-
dle (30). Seal will possibly hold bearing cone into
hub. If so, remove both from hub. If bearing cups
(33) require replacing they can be driven out of hub
counterbores. Discard seal and replace with new
seal.
EYE PROTECTION SHOULD BE WORN DURING RETAINING RING
REMOVAL.
13. To remove cluster gear (27) from carrier, remove
retaining ring (25) from planet shaft (23) and drive
planet shaft out of carrier.
14. Cluster gear and bearings (27, 29) can now be slid
out of carrier and spacer (18) removed from carrier
bore. If bearing cups (28) require replacing they can
be driven out of cluster gear counterbores.
15. Repeat steps (12) and (13) for remaining cluster
gears.
WHEN REBUILDING THE UNIT, O-RINGS AND RETAINING RINGS
SHOULD ALWAYS BE REPLACED.
Table 3-1. Wheel Torque Chart
TORQUE SEQUENCE
1st Stage 2nd Stage 3rd Stage
70 ft. lbs.
(95 Nm)
170 ft. lbs.
(225 Nm)
300 ft. lbs.
(405 Nm)