JLG 680S Service Manual - Manual (Page 147)

SECTION 3 - CHASSIS & TURNTABLE
3121234 – JLG Lift – 3-99
3.15 ROTARY COUPLING
Use the following procedure to for installing the seal kit.
1. Remove snap ring (7) from end.
2. Remove thrust ring (3) from sane end.
3. Remove center body (1) from housing (3).
4. Cut off old seals (2,3,5).
5. Assemble lip seals (2) in direction shown in Figure 3-
59., Rotary Coupling Seal Installation.
6. Reassemble O-ring (4).
7. Heat cap seals (5) in hydraulic oil for 5 minutes at
300° F (149° C).
8. Assemble cap seals over O-rings
9. Reinsert center body into housing (lube with hydrau-
lic oil).
10. Replace thrust ring and snap ring.
Figure 3-59. Rotary Coupling Seal Installation