MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-30 - Manual (Page 66)

Model 505G2.20 - 505G2.30 SilentFlo™ HPU 66
Inspecting the Heat Exchanger
Maintenance
6. Replace the HPU filter element. Refer to the related procedure.
7. Add new hydraulic fluid to the reservoir.
A. Close the fluid drain.
B. Replace the filter in the transfer pump and transfer fresh hydraulic fluid
(filtered to 10 microns) into the reservoir. Stop when the fluid level gets
close to the top of the sight glass.
C. Reinstall the filter cap’s strainer assembly.
8. Run the HPU.
A. Press the Start switch.
B. Run the HPU in low pressure for three hours to filter the new hydraulic
fluid.
C. Run the HPU in high pressure to check for fluid leaks.
D. Press the Stop button.
E. Check the dirty filter indicator. 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 and Water Quality Guide (MTS 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.