MTS Model 512-14 Hydraulic Power Unit - Manual (Page 36)

512.14 Hydraulic Power Unit 36
Replacing the Hydraulic Fluid
Maintenance
Replacing the Hydraulic Fluid
Replace the hydraulic fluid in the HPU reservoir whenever you have determined
that the hydraulic fluid is no longer suitable for use.
Recommended
equipment:
• A transfer pump with a 10 micron filter (such as the Model 590.01 Fluid
Transfer Pump)
• A 125 kg (250 lb) capacity hoist
• Synasol® or a similar cleaning solvent
• Lint-free cloths or manufactured rags
• A container for the used hydraulic oil and a drain pan that will fit underneath
the drain plug
• A hydraulic fluid sampling kit (MTS part number 055-589-601).
• A new filter (see “Replacing the Filter” on page 31)
Prerequisite
Perform the procedure “Sampling the Hydraulic Fluid” on page 32 to determine
if the hydraulic fluid should be replaced.
Identify and correct any sources of contamination.
Mixing different brands of hydraulic fluid can contaminate your system.
Contaminated hydraulic fluid can cause premature wear of the hydraulic
components in your system.
Do not mix different brands of hydraulic fluid. MTS Systems Corporation
recommends using Mobil DTE-25 or Shell Tellus 46 AW hydraulic fluid.
Procedure
1. Prepare the HPU.
A. Press STOP to turn off the HPU.
B. Remove electrical power to the HPU via the circuit breaker at the
power source or by unplugging the HPU.
C. Remove the filler cap’s strainer assembly.
CAUTION