MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-11 - Manual (Page 55)

Checking the Hydraulic Fluid
Model 505G2.07/.11 SilentFlo™ HPU 55
Checking the Hydraulic Fluid
Hydraulic fluid contamination and deterioration normally occur in most
hydraulic systems. Failure to keep your fluid sufficiently free of contaminants or
to change the fluid before severe fluid breakdown occurs will cause poor system
performance and may lead to expensive system cleanups. Servovalves are
especially susceptible to damage from dirty hydraulic fluid.
Replace all filters MTS MTS
Verify operation and settings
of psi control and relief valves MTS MTS
Check pump/motor coupling
for wear and debris MTS
Check pump voltage and
current MTS
Check case drain flow MTS
Recommend MTS Hydraulix oil
sample MTS MTS MTS MTS
Recommend replacement or
rebuild of heat exchanger MTS MTS
Recommend replacement of
hoses MTS
Inspect motor bearings ‡ MTS
Determine if replacement or
rebuild of pump required
‡
MTS
Determine if replacement or
rewind of motor is required
‡
MTS
Recommend hydraulic fluid
change & clean pump inlet
strainer MTS
* Symbol denotes services performed by equipment operators. Most of these procedures involve visual
checks that should not interfere with test system operation. These checks are also completed by trained
field service engineers on each Routine Maintenance visit.
† Symbol denotes service performed by trained field service engineers as part of an MTS Routine
Maintenance plan. Some of these procedures require special service tools and/or specific service training
to complete.
‡ Generally, an inspection would be done every 10,000 hours. Replacement/repair is typically done at
30,000 hours.
Recommended service to be performed at each running time interval noted
Calendar Time using 8 hour
Running Time rate per day Daily Weekly Monthly Annually
Running Time-Hours 8 40 160 500 1000 1,500 2,000 5,000 10,000