3-17.4 Hydraulic Pump Replacement, Model 1730-EG-100 (AVUM) - Continued.
Only hydraulic pump assembly with part number 61780 can be used to replace the defective
pump removed above. A mounting plate and hydraulic fitting guard are already installed on
an assembled pump.
Refer to figure 3-21 and Install the hydraulic pump on cradle assembly as follows:
Position hydraulic pump (4) on cradle assembly (12) and align mounting holes.
Insert two bolts (25) through holes in pump mounting plate and hydraulic fitting guard; attach with
washers (17) and nuts (26).
Install U-bolt (18) over pump (4) body and insert through holes in cradle; attach with washers (17) and
Install tee fitting (27), wrapped with Teflon Tape (item 8, Appendix D), in reducer/metering valve in
Connect hose assemblies to both sides of tee fitting (27), but do not tighten completely at this time.
Perform service fill and bleed procedure in C below.
Refer to figure 3-21 and perform fill and bleed procedure of hydraulic system as follows:
Loosen flared fitting nuts on both hoses at tee fitting (27).
Rotate axle until hydraulic rams are fully retracted.
Tighten flared fitting nuts on both hoses at tee fitting (27) and check fluid level in pump.
Refill pump with hydraulic fluid (Item 1, Appendix D) if necessary, and install cap.
Activate pump until axles are fully extended.
Release hydraulic pressure from system by rapidly rotating the pressure release valve knob
Rotate axles until the hydraulic rams are fully retracted and recheck fluid level in pump.
If fluid level is incorrect, repeat steps 1 through 7; if correct, install cap and procedure is completed.
END OF TASK