JLG 510AJ Service Manual - Manual (Page 85)

SECTION 3 - CHASSIS AND TURNTABLE
3121181 – JLG Lift – 3-43
INSPECT COMPONENTS
Inspect the new seal, the motor housing seal bore, and the
sealing area on the shaft for rust, wear, and contamination.
Polish the shaft and clean the housing if necessary.
INSTALLATION
1. Cover the shaft splines with an installation sleeve to pro-
tect the shaft seal during installation.
2. Install a new shaft seal with the cupped side facing the
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 the installation sleeve.
Loop Flushing Valve
REMOVAL
1. Using a 11/16 in internal hex wrench remove plug (1)
and (2).
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).
INSPECT COMPONENTS
Inspect new O-rings and the sealing area for rust, wear, or con-
tamination. Also check springs and poppet for wear.
INSTALLATION
1. Install orifice poppet (13).
2. Install shift spool (12).
3. Install spring retaining washers onto 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).
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
Figure 3-26. Loop Flushing Spool