Spindle - Brake Sub-Assembly; Hub-Spindle Sub-Assembly - JLG 600AJ Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE
4. Repeat Step 2 to put in second roll of Needle Rollers (4C).
5. Apply grease to hold two Thrust Washers (4B) together
and on Output Planet Gear (4F) counterbore. Do the
same to the other side.
6. Repeat Steps 1-5 to finish assembly of two remaining
Output Planet Gears (4F).

Spindle - Brake Sub-Assembly

1. Place Spindle (1A) with flange side up.
Place Stator (8K) in Spindle (1A) scallop cuts.
2.
3. Place Rotor (8J) on top of Stator (8K).
4. Repeat steps 2 & 3 until there are a total of 9 Stators (8K)
and 8 Rotors (8J) installed.
5. Place Piston (8A) with smaller O.D. end facing up. Grease
two O-Rings and two Backup Rings.
6. Install large Backup Ring (8E) in large-diameter groove at
bottom of Piston (8A).
7. Install large O-Ring (8D) in large-diameter groove at bot-
tom of Piston (8A), on top of large Backup Ring (8E).
8. Install small O-Ring (8F) in small-diameter groove near
top of Piston (8A). Make sure O-Ring is seated on the
bottom of the groove.
9. Install small Backup Ring (8H) in small-diameter groove
near top of Piston (8A), on top of small O-Ring (8F).
10. Insert Piston (8A) in Spindle (1A) until it contacts Stator
(8K).
11. Insert appropriate number of Springs (8L), based on
assembly print, into Piston (8A)counterbore.
12. Place Spring (1L) in Coupling (7) counterbore. Place Pres-
sure plate (1M) on top of Spring (1L).
13. Use appropriate tool to install Retaining Ring (1K) in
retaining ring groove in coupling (7) counterbore.
14. Insert Coupling sub-Assembly (7) through Rotors (8J).
15. Place Pressure Plate (8B) on top of Springs (8L).
16. Use two ¼ -20 x 0.625 flat head Capscrews (22) by bolt-
ing Pressure Plate (8B) and Piston (8A) together or some
other appropriate tools to install Retaining Ring on top
of Pressure Plate (8B) until Retaining Ring (8C) is seated.
NOTE: Remove 2 Screws from units when done or brake will not
function.
17. Install Pipe Plug (21) if applicable
3-20

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 pressing tool.
2. Turn hub over and press Bearing Cup of part (1C), posi-
tion "B", into hub using 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, posi-
tion "A".
8. Apply Medium Strength Threadlocking Compound on
Bearing Nut (1F) thread. Screw Nut (1F) on top of Bearing
Cone of part (1C). Leave 0.003-0.005 inches end play to
check the initial rolling torque with the unit tied down.
Then torque Bearing Nut (1F) until rolling torque is 40 to
50 in-lbs greater than initial rolling torque. Using tool for
the Bearing Nut.
NOTE: Final torque is initial rolling torque plus 40-50 in-lb (4.5-5.6
Nm). For example, if initial rolling torque is 30 in-lb (3.3
Nm), final rolling torque is between 70-80 in-lb (7.9-9 Nm).
Rotate hub as torque is applied to properly seat bearing. Be
sure 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) in 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 spin-
dle (1A) assembly using tool.
12. Insert a Planet Shaft (4E) into the planet shaft hole
described in Step (11) on Spindle (1A). Insert end of
planet shaft that does NOT have roll pin hole in Spindle
FIRST.
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