MTS Model 512-14 Hydraulic Power Unit - Manual (Page 35)

Adding Hydraulic Fluid
512.14 Hydraulic Power Unit Maintenance 35
Adding Hydraulic Fluid
1. The hydraulic power unit (HPU) will shut down when fluid drops below the
sight glass. Normally, it should be close to the top of the sight glass.
Check the Fluid Level
Do not mix different brands of hydraulic fluid.
Mixing different brands of hydraulic fluid can contaminate your system.
Call MTS if you’re not sure what brand of hydraulic fluid your system uses.
Note New fluid should be prefiltered with a 10 micron filter since it may not be
clean.
2. Open the filler cap. Add 1 liter (1 quart) of fluid at a time until the fluid level
is normal.
3. Replace the cover cap.
4. Start the HPU.
Normal Level
No Fluid Visible
CAUTION