JLG 1850SJ, Service And Maintenance Manual, Page: 74 / 712

SECTION 3 - CHASSIS & TURNTABLE
3-24 3121619
INSPECTION
Inspect new seal, motor housing seal bore, and sealing area on
shaft for rust, wear, and contamination. Polish shaft and clean
housing if necessary.
INSTALLATION
1. Cover shaft splines with an installation sleeve to protect
shaft seal during installation.
2. Install new shaft seal with cupped side facing motor.
Press seal into housing until it bottoms out. Press evenly
to avoid binding and damaging the seal.
3. Install seal support washer.
4. Install snap ring.
5. Remove installation sleeve.
Loop Flushing Valve
REMOVAL
1. Using a 11/16 in internal hex wrench remove plug (1)
and (2).
Figure 3-17. 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
1. Inspect new O-rings and the sealing area for rust, wear,
or contamination.
2. 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