WRIGHT WSES36, Service Handbook

Page: 55 / 68

Hydro Pump
External Maintenance
¾ Check fluid level in reservoir
¾
Level should be 1”-1 ½” below the top of the oil fill
¾
Inspect drive belt, idler pulley, and idler spring
¾ Inspect all plumbing for possible leaks or loose fittings
¾
Insure reservoir is free of contaminants and properly vented
¾
Inspect control linkage
Fluid Change
¾
WMI does not recommend a fluid change unless oil contamination occurs
¾
Change filter every 200 hrs
Purging Procedure
¾ Due to the effects air has on efficiency in hydro-static drive applications, it is critical that air is purged
from the system
¾
These purge procedures should be implemented anytime the system is open (R&R hose, R&R pump)
1. Make sure oil reservoir is at proper level
2. Raise and secure the machine
3. With the engine running, open the bypass valves and slowly move the directional controls in
both forward and reverse directions 5 – 6 times
NOTE: As air is purged form the unit the oil level will drop
4. Close the bypass valves and slowly move the directional controls in both forward and reverse
directions 5 – 6 times
5. It may be necessary to repeat steps 3 and 4 until all air is purged from system
6. When pumps move forward and reverse at normal speed purging is complete
7. Check and fill fluid
Testing
¾
Need to have a BDP Flow Test Kit (Hydro Gear Part # 70511)
¾
The purpose of the Flow test kit is to allow the dealer to isolate the pump from the wheel motor and
determine if the pump is faulty
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