Rotary Coupling - JLG 600A Service And Maintenance Manual

3.18 ROTARY COUPLING - (USA BUILT MACHINES, SN
0300087000 THROUGH 0300138648)
Use the following procedure to install the seal kit.
1. If not already removed, remove the axle oscillation valve
from the cylinder barrel. The spool of the valve pro-
trudes into the barrel and will damage the spool and
seals if left in place.
2. Remove snap ring (12) from end.
3. Remove thrust ring (13) from the same end.
4. Remove center body (10) from housing (11).
5. Cut off old seals (14,15,17 and 18).
6. Assemble lip seals (14) in direction shown in Figure 3-
66., Rotary Coupling (USA Built Machines, SN
0300087000 through 0300138648) - Sheet 2 of 2.
7. Reassemble O-ring (18).
8. Heat cap seals (17) in hydraulic oil for 5 minutes at 300° F
(149° C).
9. Assemble cap seals over O-rings
10. Reinsert center body into housing (lube with hydraulic
oil).
11. Replace thrust ring and snap ring.
3121201
SECTION 3 - CHASSIS & TURNTABLE
Table 3-10. Coupling Port Information Table - 2WS
Port Out Port
Description
No. let Size
1 1 -8 Brake
2 2 -6 2 Speed
3 1 -6 Steer
4 1 -6 Steer
5 2 1-6, 1-16 Drive Reverse
6 1 -16 Drive Forward
7 3 2-8, 1-6 Drain
Table 3-11. Coupling Port Information Table - 4WS
Port Outl Port
Description
No. et Size
1 1 -8 Brake
2 2 -6 2 Speed
3 1 -6 Steer
4 1 -6 Steer
5 2 1-6, 1- Drive Reverse
16
6 1 -16 Drive Forward
7 3 2-8, 1-6 Drain
8 1 -6 Steer
9 1 -6 Steer
Operating Proof
Pressure Pressure
PSI (Bar) PSI (Bar)
450 (31) 675 (47)
4500 (310) 6750 (465)
2500 (172) 3750 (259)
2500 (172) 3750 (259)
4500 (310) 6750 (465)
4500 (310) 6750 (465)
250 (17) 375 (26)
Operating Proof
Pressure Pressure
PSI (Bar) PSI (Bar)
450 (31) 675 (47)
4500 (310) 6750 (465)
2500 (172) 3750 (259)
2500 (172) 3750 (259)
4500 (310) 6750 (465)
4500 (310) 6750 (465)
250 (17) 375 (26)
2500 (172) 3750 (259)
2500 (172) 3750 (259)
3-105