MTS Model 512-14 Hydraulic Power Unit User Manual
Page 38
512.14 Hydraulic Power Unit
38
Replacing the Hydraulic Fluid
Maintenance
Synasol is toxic and flammable.
Use the Synasol solvent in a ventilated area and keep it away from an open
flame.
Follow the cautions and warnings on its container.
3. Clean the reservoir.
A. Disconnect the heat exchanger’s two hydraulic fluid lines.
B. Unscrew the cover screws attaching the cover plate to the reservoir.
C. Attach straps to the cover plate’s two lifting eyes. Lift the cover plate
clear of the reservoir.
D. Clean the inside of the reservoir using clean cloths dampened with
Synasol. Clean the pump and bottom of the cover plate as well.
E.
Inspect the pump’s suction strainer. Replace this strainer if it is plugged
or damaged.
F.
Lower the cover plate back down onto the reservoir.
G.
Wipe off the magnetic drain plug and install it.
H. Tighten the four screws that attach the cover plate to the reservoir.
4. Add new hydraulic fluid to the reservoir.
A. Close the fluid drain.
A. Install the transfer pump’s 10–micron filter.
B. Pump clean hydraulic fluid into the reservoir. Stop when the fluid level
gets close to the top of the sight glass.
C. Install the filler cap’s strainer assembly.
5. Replace the HPU filter (see
6. Run the HPU.
Turn the HPU to LOW PRESS. Run the HPU in a no-flow condition (no
fluid is flowing to other hydraulic equipment) for about one hour to filter the
new hydraulic fluid.
7. Check the filter change gage’s needle. Replace the filter if the needle
remains in the yellow or red zone.
CAUTION