Chapter 4: Maintenance
84 M47-17027-EN
13. Install the air breather filter onto the reservoir fill hole.
14. Start the HPS and cycle the hydraulic cylinder through its full stroke a few times. Fully retract the
hydraulic cylinder. Press the DISABLE FRAME button in the controlling software to shut down the
HPS. Check the oil level. If the oil is not to the top of the sight gauge, repeat step 7 and then
steps 12 through 14. If the oil is to the top of the sight gauge, continue with next step.
15. Install the cover that was removed in step 1.
Change the air breather filter
The air breather filter should be changed at the frequency stated in the “Preventative maintenance
schedule” on page 61.
Equipment and supplies required
• New air breather filter - for Instron part number see Table 18 on page 90
Recommended procedure
Refer to Figure 20 on page 82 for identification of components.
1. Remove the right side cover from the frame base. Refer to “Remove and install base covers” on
page 64.
2. Clean the area around the fill hole and air breather filter (3 and 2) to remove all dust, dirt and grime.
3. Remove the air breather filter from the reservoir fill hole - push down and turn counterclockwise.
Properly dispose of the air breather filter.
4. Install the new air breather filter onto the reservoir fill hole.
5. Install the cover that was removed in step 1.
Inspect the hydraulic hoses
Hydraulic hoses should be inspected at the frequency stated in the “Preventative maintenance
schedule” on page 61. Check the following:
• Inspect all hose fittings for loose connections. This includes connections at the frame and at the
HPS. Also be sure to check all hose fittings for any hydraulic accessories that are part of the testing
system. Tighten any loose fittings that you may find.
• Inspect all hydraulic hoses for deterioration. Check for abrasions, cuts, etc. Replace hoses as
necessary.
Replace the hydraulic hoses
Hydraulic hoses should be replaced at the frequency stated in the “Preventative maintenance
schedule” on page 61. The service life of any hydraulic hose depends on the pressure that it is
subjected to during its normal use.
When ordered from Instron, the air breather filter includes a new air breather fitting and plastic screen.
The only part needed is the air breather filter. However, you can replace the existing air breather fitting
and plastic screen with the new parts if desired or necessary (due to damage, etc.).
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