MTS Series 505 SilentFlo Hydraulic Power Unit Model 505-180 - Manual (Page 103)

Inspecting the Heat Exchanger
Model 505.60 - 505.180 SilentFlo™ HPU Maintenance 103
A. Turn on power to the HPU. Rotate the power disconnect switch to the
on (|) position.
B. Select Main Panel from the Startup screen.
C. Press Reset on the Main Panel to clear interlock conditions resulting
from applying power to the HPU.
D. Press Run/Low Pressure on the Main Panel.
E. Run the HPU at low pressure for about three hours to filter the new
hydraulic fluid.
F. Press the High Pressure button to select the high pressure mode.
Check the HPU for fluid leaks.
G. Press Stop.
H. Check for a Filter Dirty indication on the HPU Run Status indicator
on the Main Panel. Replace the filter element and continue to filter the
fluid as needed.
Inspecting the Heat Exchanger
Prerequisite
Perform an external inspection of the heat exchanger after every 500 hours of
operation (see Step 2 below).
Perform an internal inspection of the heat exchanger after every 2000 hours of
operation or when you notice a decrease in the heat exchanger performance.
Refer to the Heat Exchanger Care Guide (part number 015-164-000) for
additional information on heat exchangers and causes of heat exchanger failure.
Important This procedure requires special training and familiarity with heat
exchanger operation. You must unbolt and remove the heat
exchanger from the reservoir in order to inspect it. Consult MTS
before you perform an internal inspection or any maintenance on
the heat exchanger.
Procedure
To inspect the heat exchanger:
1. Shut off the HPU and the cooling water supply.
2. Externally inspect the exchanger for:
• Dents, bulges, corrosion and leaks
• Damaged gaskets
• Worn, frayed, and leaking hoses
3. Drain all hydraulic fluid from the heat exchanger.
4. Drain all water from the exchanger.
5. Clean all filters and screens.