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MTS 318 Load Unit User Manual

Page 99

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Routine Maintenance Overview Checklist

318 Load Unit

Maintenance

99

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.

The filter element should be replaced whenever:

The indicator on the top of the filter housing is in the bypass position, which
indicates a dirty filter condition.

The hydraulic fluid in the hydraulic power unit is changed.

Replace the filter element with one of the same rating or better.

Perform the following procedure to change the filter element.

1. Ensure that system hydraulic pressure has been reduced to zero before

proceeding. To do this, turn off the hydraulic power unit and exercise the
actuator until it stops moving.

2. Turn off electrical power at the controller.

3. Place a waste fluid pan beneath the filter housing, which will accumulate

any small amount of drainage from the filter housing.

4. Remove the inlet filter bowl.

5. Remove the disposable filter element from the filter bowl.

6. Empty the oil in the filter bowl into the pan. Wipe out any remaining

sediment with a clean lint-free cloth.

7. Inspect the O-ring in the filter housing for any sign of deterioration. If

necessary, replace the defective O-ring (part number 010-010-726).

8. Lubricate the filter element and filter housing O-rings with clean hydraulic

fluid. Insert the replacement filter element into the filter bowl. Tighten the
filter bowl to 34–41 N·m (25–30 lbf·ft).

9. Apply low, then high, hydraulic pressure to the actuator manifold and

inspect the seal between the filter bowl and housing for any signs of
leakage. If leakage exists, turn off system hydraulic and electrical power and
repeat Steps 4 through 9.

F

ILTER

P

ART

N

UMBER

K

IT

N

UMBER

3 micron (Beta

3

= 75)

011-395-937

044-205-301

10 micron (Beta

7.4

= 75)

011-395-936

044-205-201

CAUTION