3-17.4 Hydraulic Pump Replacement, Model 1730-EG-100 (AVUM) - Continued.
Refer to figure 3-21 and remove hydraulic pump from cradle assembly as follows:
Place drip pan under wheels assembly.
Remove hydraulic pressure from system by rapidly rotating the pump release valve knob
Disconnect both hose assemblies from tee fitting (27) installed in pump reducer/metering valve, and
drain fluid into drip pan.
Remove tee fitting (27) from reducer/metering valve in pump, and retain for Installation In replacement
Remove pump (4) as follows.
Remove two nuts (16) and washers (17) from U-bolt (18).
Remove U-bolt (18).
Remove two nuts (26), washers (17), and bolts (25).
Grasp pump (4) and lift from cradle assembly (12).
If pump was removed as part of a disassembly procedure, retain pump and attaching hardware
If pump was removed because it is defective, send to AVIM for repair
Figure 3-21. Hydraulic Pump, Part No. 61780
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