Section 6
Hydraulic System
20425603
5-2005/Rev 0
6-8
Figure 6-6: Coupling Components
8. Remove the failed flexible coupling.
9. Wipe any residue, dirt or oil from the coupling halves on both the motor shaft, and the
pump shaft. Avoid damaging the shaft seal on the pump.
10. Inspect the metal splines on the coupling halves for damage.
11. Inspect the shaft cavity of the hydraulic pump for the presence of hydraulic oil or evidence
of hydraulic leaks. If a hydraulic leak is detected, the shaft seal must be replaced.
12. Install the new flexible coupling over the coupling half on the motor shaft, aligning the
splines. Push the flexible coupling on as far as it will go. The internal band keeps the
coupling centered between the motor and pump shafts.
13. Move the motor and pump assembly together to engage the flexible coupling with the
coupling half on the pump shaft. You may need to turn the motor shaft to align the splines
with the pump shaft. When the motor and pump are rejoined, the coupling will have a
small amount of end clearance to allow the coupling to float.
14. Replace the pump mounting bolts and torque to 55 ft-lbs (75 Nm). Remove the wooden
blocks.
15. Position the motor and pump assembly in the frame, aligning the vibration isolation
mounts with the mounting holes in the frame base plate.
16. Install the vibration mounts to the frame base plate.
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