PUMPS
SUB-SECTION 4B
Figure 4B-16. Pressure Feed to Vanes
Figure 4B-18 shows the proper relationship of the parts for
REMOVAL
disassembly and reassembly. During disassembly, pay par-
ticular attention to identification of the parts for correct
To remove a pump from the pump drive, proceed as fol-
reassembly.
lows:
1. Turn the suction line valve to the dosed position.
2. Disconnect the suction and outlet lines from the pump.
Cap the lines and plug the pump ports to prevent the entry
of foreign material into the pump or hydraulic system.
3. Block the pump in position against the pump drive so
that it will not drop when the capscrews are removed. Re-
move the two capscrews securing the pump to the pump
drive. Slide the pump back from the pump drive until the
driveshaft is clear of the pump drive, and remove the pump
to a suitable repair area.
CARTRIDGE REPLACEMENT
GENERAL. Preassembled replacement cartridges are avail-
able for rapid field overhaul of these pumps. If a replace-
ment cartridge is being used, proceed as described below for
disassembly and reassembly.
Figure 4B-17. Pressure Plate Operation
4B-10