Rotary Coupling - JLG 400S Service And Maintenance Manual

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3.15 ROTARY COUPLING

Use the following procedure to install the seal kit.

1. If not already removed, remove the axle oscillation valve

from the cylinder barrel. The Shaft of the valve protrudes

into the barrel and will damage the Shaft and seals if left

2. Remove Retaining ring (5) from end.

3. Remove spacer (4) from the same end.

4. Remove center body (2) from housing (1).

5. Cut off old Seals (11, 12) positioned on the shaft and

Seal (13) on the center body .

6. Reassemble O-ring (10).

7. Remove proximity switch.

8. Assemble lip seals (11) in direction shown in Figure 3-

64., Rotary Coupling Cutaway.

9. Heat cap seals (12) in hydraulic oil for 5 minutes at 300° F

10. Assemble cap seals over O-rings

11. Reinsert center body into housing (lube with hydraulic

12. Replace Spacer and snap ring.

SECTION 3 - CHASSIS & TURNTABLE

Table 3-10. Coupling Port Information Table -

(SN 0300203771 through 0300222808)

Drive Reverse

Drive Forward

Axle Release

Table 3-11. Coupling Port Information Table -

(SN 0300222809 to Present, SN E300000100 to Present, SN

1300007289 through 1300007393)

Drive Reverse

Drive Forward

Axle Release