The tools listed will be needed to do the following procedure:
MEL10003 – Hydraulic Tester
MEL10006 – Hydraulic Test Kit
Turn the key switch to the OFF position. To release the hydraulic pressure at the front auxiliary quick couplers push the couplers into the coupler block and hold for three seconds.
Lift and block the loader. (See Procedure on Page 10-10-1.)
Connect the IN port (Item 1) [Figure 20-30-1] of the hydraulic tester to the bottom (female) quick coupler on the loader.
Connect the OUT port (Item 2) [Figure 20-30-1] of the hydraulic tester to the top (male) quick coupler on the loader.
• Press the AUXILIARY HYDRAULICS Button (Item 1) [Figure 20-30-2] Maximum Flow.
• Push the front switch (Item 1) [Figure 20-30-3] or [Figure 20-30-4] to give the front quick couplers a constant flow of fluid.
• Push the front switch (Item 1) [Figure 20-30-3] to give the front quick couplers a constant flow of fluid.
• To release from continuous operation, press the front switch (Item 1) [Figure 20-30-3] a second time.
Watch the flow meter on the hydraulic tester to make sure the flow is correct. Increase the engine speed to full RPM.
Refer to Specifications, (See Hydraulic System on Page SPEC-10-3.) for both flow and pressure specifications of the hydraulic system.
Check the free flow specification.
Turn the restrictor control, on the tester, until the main relief valve opens. Check the relief pressure.
If the relief pressure is not correct, stop the engine and adjust the main relief valve.