JLG 660SJ Service Manual - Manual (Page 63)

SECTION 3 - CHASSIS & TURNTABLE
3121298 – JLG Lift – 3-19
Loop Flushing Valve
REMOVAL
1. Using a 11/16 in internal hex wrench remove plug (1)
and (2).
Figure 3-23. Loop Flushing Spool
2. Using a 1/4 in hex wrench remove plug (3).
3. Remove O-rings (4, 5, and 6).
4. Using pliers, remove centering springs (7, 8, and 9).
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. Using a 1/4 in hex wrench torque plug (3) to 20 ft. lbs.
(27 Nm).
7. Using a 11/16 in internal hex, torque plugs (2 and 1) to
27 ft.lbs. (37 Nm).
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
2
6
9
11
1
4
8
10
12
5 3
7
13
(37 Nm)
27 ft-lb
11/16 in
(37 Nm)
27 ft-lb
11/16 in
20 ft-lb (27 Nm)
5/8 in