Hub-Spindle Sub-Assembly; Cover Sub-Assembly; Main Assembly - JLG 600A Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

Hub-Spindle Sub-Assembly

NOTE: Spray a light film of oil on all component parts during
assembly. Spray a generous amount of oil on bearings dur-
ing installation.
1. Press bearing cup of part (1C), position "A", into hub
using T-158422 pressing tool.
2. Turn hub over and press Bearing cup of part (1C),
position "B", into hub using T-158422 pressing tool (T).
3. Place bearing cone of part (1C), into bearing cup of part
(1C), position "B".
4. Grease seal (1B) lip and press seal into hub (1D) using
appropriate tool until seal is flush with end of hub (T).
5. Place Hub (1D) into pressing base. Press nine Studs (1H)
into Hub.
NOTE: Use enough pressure to press in studs. Don t use excessively
high pressure to press in studs or hub may crack.
6. Set spindle assembly (1A) on the bench with the flange
down. Turn Hub (1D) over and lower onto Spindle (5).
Install boot (21) if applicable.
7. Install bearing cone of part (1C) into bearing cup,
position "A".
8. Apply Loctite 243 on Bearing Nut (1F) thread. Screw nut
(1F) on top of bearing cone of part (1C) leave 0.003-
0.005 in. (0.7-1.3 mm) end play to check the initial rolling
torque with the unit tied down. Then torque bearing nut
(1F) until rolling torque is 40-50 in. lbs. (4.5-5.5 Nm)
greater than initial rolling torque. Using tool T-206569
for the bearing nut.
NOTE: Final torque is initial rolling torque plus 40-50 in. lbs. (4.5-
5.5 Nm). E.g., if the initial rolling torque is 30 in. lbs. (3.4
Nm), the final rolling torque is between 70-80 in. lbs. (8-9
Nm). Be sure to rotate hub as the torque is applied to prop-
erly seat the bearing. Be sure the torque wrench is tangent
to the hub (1D) OD.
9. Using appropriate tool, install two set screws (1G) into
bearing nut (1F) threaded holes. Make sure set screw is
driven into the spindle thread. Tighten the set screws to
damage the thread and stake the edge of the nut
around the set screws (1G) so the nut will not loosen.
10. Place thrust washer (4H) into counterbore of spindle
(1A).
11. Place planet gear sub-assembly (4) into spindle (1A)
through gap between two studs (1H). Align the planet
gear bore with one of the planet shaft holes on the
spindle (1A) assembly using T-209919.
12. Insert a planet shaft (4E) into the planet shaft hole
described in step (11) on spindle (1A). The end of the
3-22
planet shaft that does not have the roll pin hole should
be inserted into the spindle FIRST.
13. Now insert planet shaft (4E) through the first set of
thrust washers (4B), planet gear, then the second set of
washers (4B). Use an alignment punch or similar tool to
align roll pin holes on spindle (1A) and planet shaft (4E).
NOTE: Be sure not to hit the planet gears (4F) when driving in roll
pins (4G).
14. Drive roll pin (4G) down into the aligned roll pin holes.
Pin should be flush with OD of spindle.
15. Repeat Steps (11-14) for the installation of the two
remaining planet gears (4F).

Cover Sub-Assembly

1. Grease O-ring (6E) and insert into internal groove in
cover (6A).
2. Assemble disengage cap (6B) onto cover (6A) using two
hex head bolts (6C). Torque bolts to 70-80 in. lbs. (8-9
Nm).
3. Insert disengage rod (6D) into hole in cover (6A) until it
touches the inside of the disengage cap (6B).
NOTE: The disengage rod can be inserted either end first.
4. Grease Face of thrust washer (2) and place in cover (6A)
making sure that tangs on washer seat into pockets in
cover.
5. Install O-ring pipe plugs (6F) into cover (6A). The plugs
should be hand tight.

Main Assembly

NOTE: All components should receive a generous amount of lubri-
cant oil as they are being assembled.
1. Place hub-spindle sub-assembly on the bench.
2. Grease O-ring (18) and place it into groove of hub (1D).
3. Place ring gear (1E) onto hub (1D). Align the three
shipping capscrew holes on hub (1D) and ring gear (1E).
4. Install three shipping capscrewcapscrews (19) into ring
gear and hub. Torque them to 15-20 ft. lbs. (20-27 Nm).
5. Place external retaining ring (5) over 13T spline to the
retaining groove on input shaft (9).
NOTE: For ratio 48:1, assemble output sun gear (11) over input
shaft (9) first, then install external retaining ring (5).
6. Using appropriate tool to install retaining ring (20) into
groove on output sun (11).
7. Place input shaft (9) spline end into mesh with internal
coupling (7) splines.
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