The hydraulic pump is mounted on a drive pad of the
The hydraulic pump is a positive displacement, gear-
torque converter. The purpose of the pump is to
type pump and consists of three separate sections.
convert the mechanical energy of the torque
The first section of the pump, the one on the
converter into fluid energy for the operation of the
mounting flange end, has an output of 39 gpm (148
crane's hydraulic components.
lpm). The second (middle) section has an output of
39 gpm (148 lpm). The third section has an output of
16 gpm (61 lpm).
For more detailed information, refer to the applicable SM package.
Cover the pump mount opening to prevent dirt
from entering the drive unit.
Remove the pump cover plate.
Remove and discard the gasket between the
Tag and disconnect the supply lines from the
drive pad and the pump.
Tag and disconnect the pump distribution lines
from the pump. Cap all the lines and openings.
During assembly, assure that a new
gasket is used between the drive pad
Keep the pump as level as possible to
avoid damaging the splines.
Install pump to torque converter, refer to Figure
2-8-6. Assure that the distribution and supply lines
are properly connected as tagged during removal.
The hydraulic pump and the disconnect
Operate the pump for at least two minutes at
are attached to the torque converter with
zero pressure and moderate speed (not over 1,500
the same hardware.
If the pump appears to be operating
satisfactorily, increase the rpm intermittently, until the
Remove the four nuts and washers attaching
governed rpm has been attained. Continue this
the pump to the torque converter drive pad. Remove
procedure for approximately five minutes while
checking for proper operation and leakage.