MTS Model 512-14 Hydraulic Power Unit - Manual (Page 18)

512.14 Hydraulic Power Unit 18
Running the HPU
Operation
Running the HPU
The following procedure is a guideline, and it assumes you are starting the
hydraulic power unit (HPU) after the it has been turned off for some time (the
hydraulic fluid is considered cool). You may want to incorporate portions of this
procedure into your system startup sequence.
1. Check the fluid level in the sight gage.
The hydraulic fluid should be close to the top of the sight glass. If you need
to add fluid, add 1 liter (1 quart) at a time.
Check the Fluid Level
2. At your test controller, make sure hydraulic pressure is turned off.
Note Some controllers can remotely control the HPU.
3. Turn the start switch to LOW PRESS and wait for the motor to get up to
speed.
Turn this switch to HIGH PRESS.
4. Check to make sure the filter change gage’s needle stays in the green zone.
Turn the HPU off and change its filter if the needle stays in the yellow or red
zones.
Note Cold fluid may push it temporarily into the red zone.
Normal Fluid
Level
Low Fluid
Level
START
LOW
PRESS.
HIGH
PRESS.
START
LOW
PRESS.
HIGH
PRESS.