JLG 660AJ Service Manual - Manual (Page 61)

SECTION 3 - CHASSIS & TURNTABLE
3121616 – JLG Lift – 3-17
Loop Flushing Valve
REMOVAL
1. Remove plug (1) and (2) using an 11/16 in internal hex
wrench.
Figure 3-18. Loop Flushing Spool
2. Remove plug (3) using a 1/4 in hex wrench.
3. Remove O-rings (4, 5, and 6).
4. Remove centering springs (7, 8, and 9) using pliers.
5. Remove spring retaining washers (10 and 11).
6. Remove shift spool (12).
7. Remove orifice poppet (13).
INSPECTION
Inspect new O-rings and the sealing area for rust, wear, or con-
tamination. Check springs and poppet for wear.
INSTALLATION
1. Install orifice poppet (13).
2. Install shift spool (12).
3. Install spring retaining washers on springs (10 and 11).
4. Carefully install centering springs (7, 8, and 9).
5. Install new O-rings (6, 4, and 5).
6. Torque plug (3) to 20 ft-lb (27 Nm) using an 1/4 in hex
wrench.
7. Torque plugs (2 and 1) to 27 ft-lb (37 Nm) using an 11/16
in internal hex.
2
6
9
11
1
4
8
10
12
5 3
7
13
(37 Nm)
27 ft.lbs.
11/16 in
(37 Nm)
27 ft.lbs.
11/16 in
(27 Nm)
20 ft.lbs.
5/8 in
1. Plug
2. Plug
3. Plug
4. O-ring
5. O-ring
6. O-ring
7. Spring
8. Spring
9. Spring
10. Washer
11. Washer
12. Shift Spool
13. Orifice Poppet