HPU400 Hydraulic Power Units
Kobelt Manufacturing Co. Ltd.
Rev A
MNL_HPU400
19 of 33
6
M
AINTENANCE
6.1
P
REVENTATIVE
M
AINTENANCE
During normal operation of the pump, the high-pressure filter should be checked periodically
and changed or washed out if contaminated.
If the speed of the steering system begins to gradually slow down. It
is an indication that the filter is plugging.
Check the pressure gauge on the pump, a higher pressure indicates a plugged filter. Isolate
the pump hydraulically, remove the filter cap and change or clean the filter. Return the pump
to normal operation. If the filter becomes plugged on a regular basis, the steering system
should be flushed out and the hydraulic oil replaced.
The brushes on the electric DC motor can be easily checked by removing the access plate and
visually inspecting the brushes. Replace the carbon brushes as required and check the
internal condition of the motor.
•
Monthly (12 times per year)
o
Inspect connections for leaks.
•
Quarterly (4 times per year)
o
Verify adequate oil level.
o
Visually inspect wire and cable insulation for splits or damage.
•
Every (2) two years
o
Sample and analyze the oil in the steering lines.
o
Drain reservoir and clean out.
