JLG 340AJ Service Manual - Manual (Page 60)

SECTION 3 - CHASSIS & TURNTABLE
3-20 – JLG Lift – 3121259
6. Use Truarc #0100 or equivalent pliers to install Retaining
Ring (5) into the retaining ring groove in the counter-
bore the Coupling (7).
7. Insert Coupling Subassembly (7) through Brake Rotors
(8J).
8. Grease the O-Rings (8F) and (8D) and the Backup Rings
(8H) and (8E).
9. Install small O-Ring (8D) into the o-ring groove of Spin-
dle (1A).
10. Install small Backup Ring (8E) into the o-ring groove of
Spindle (1A), on bottom of the small O-Ring (8D).
11. Set the Brake Piston (8A) so that the large diameter end
is down. Install large Backup Ring (8H) in the large diam-
eter groove at the bottom of the Brake Piston (8A).
12. Install large O-Ring (8F) in the large-diameter groove at
the bottom of the Brake Piston (8A), on top of the large
Backup Ring (8H).
13. Use appropriate tool to insert Brake Piston (8A) with
backup ring and o-ring into Spindle (1A) until it contacts
Brake Stator (8K).
14. Insert twelve Springs (8L) into Brake Piston (8A) holes
and then install the smaller twelve Springs (8M) into the
Springs (8L) already installed into the brake piston.
15. Press Ball Bearing (8B) in the Mounting Adaptor (1N) and
then install Retaining Ring (8C) into the retaining ring
groove of the mounting adaptor.
16. Before installing the Quad Seal (1K) into groove of
Mounting Adaptor (1N) grease internal diameter of the
quad seal.
17. Install O-Ring (8F) into the outside o-ring groove of the
Mounting Adaptor (1N).
18. Insert the Adaptor Subassembly onto Spindle (1A) with
the o-ring port on the spindle flange centered between
the two motor mounting holes on the Mounting Adap-
tor (1N).
19. Secure the Mounting Adaptor (1N) to the Spindle (1 A)
with 8 bolts (21). Torque the bolts to 36-38 ft-lbs in X
pattern.
20. Use the Integral Brake Check Procedure to leak check
the brake, record initial release pressure.
21. Disconnect Brake Tester and install O-Ring Plug (12) and
tighten according to DIN standard if applicable.
Figure 3-17. Spindle-Brake Figure 2
1L. Spring
1M. Thrust Washer
5. Internal Retaining Ring
7. Coupling
Figure 3-18. Spindle-Brake Figure 3
1K. Quad Seal
1N. Mounting Adaptor
8B. Ball Bearing
8C. Retaining Ring
8F. O-ring