Mts Series 505G2 SilentFlo Hydraulic Power Unit Model Manuel d'utilisateur télécharger pdf (Page 61)

Replacing the Hydraulic Fluid

Model 505G2.07/.11 SilentFlo™ HPU

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)

• ethanol or a similar cleaning solvent

• Lint-free cloths or manufactured rags

• A container for the used hydraulic oil and a small 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 Return Line Filter”

Prerequisite Perform the procedure “Sampling the Hydraulic Fluid” 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 ExxonMobil DTE-25 or Shell Tellus 46 AW hydraulic fluid.

Opaque fluid

Indicates chemical breakdown Replace the fluid

Milky appearance

Indicates water is present in the

fluid

Check the heat exchanger for damage.

Look for other water sources if the

water does not appear to be coming

from the heat exchanger.

Identify and correct the source of the

water leakage and replace the fluid if

necessary.

Sediment at the bottom of

the sample container (after

sample has stood

overnight)

Indicates collapsed, ruptured, or

clogged filter(s)

Analyze the fluid and replace all filter

elements.

Clean the fluid or replace it as required

by the analysis.

Fluid Properties Problem What to Do

CAUTION

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Mts Series 505G2 SilentFlo Hydraulic Power Unit Model Manuel d'utilisateur Page 61

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