TM 5-2420-231-23-1
0064
Table 1. All Hydraulic Functions Move Slowly or Have No Power - Continued.
064
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Perform pump output test (WP
Efficiency of Pump Less Than 70
All Hydraulic Functions
Percent - Turn ignition switch to the off
Move Slowly or Have No
position (TM 5-2420-231-10).
Power - Continued
Perform Flowmeter Disconnect
Procedure (WP 0086).
Replace hydraulic oil pump (WP 0230).
Proceed to Test Step 8.
Efficiency of Pump Is 70 Percent or
Greater - Turn ignition switch to the off
position (TM 5-2420-231-10).
Disconnect pressure gauge and hose.
Replace pilot control valve (WP 0264).
Proceed to Test Step 8.
Test Step 4. Test Flow Regulator
Pressure.
Perform flow regulator pressure test
Flow Regulator Pressure 225 psi
(WP 0086). Pressure reading should be (1,551 kPa) or Higher - Proceed to Test
at least 225 psi (1,551 kPa).
Step 5.
Flow Regulator Less Than 225 psi
(1,551 kPa) - Perform Flowmeter
Disconnect Procedure (WP 0086).
Replace hydraulic oil pump (WP 0230).
Proceed to Test Step 8.
Test Step 5. Test and Adjust Loader
Relief Valve.
1. Perform loader relief test (WP
Loader Relief Valve Pressure 3,000
to 3,200 psi (20,684 to 22,063 kPa) -
Proceed to Test Step 6.
Loader Relief Valve Pressure Not
Within Specification of 3,000 to 3,200
psi (20,684 to 22,063 kPa) - Proceed
to step 2.
2. Adjust loader relief valve to specifi- Loader Relief Valve Adjusts
Correctly - Perform Flowmeter
cation of 3,000 to 3,200 psi
(20,684 to 22,063 kPa) (WP 0086). Disconnect Procedure (WP 0086).
Proceed to Test Step 8.
Loader Relief Valve Does Not Adjust
Correctly to Specification or Loader
Relief Valve Opening Pressure Is
Less Than 2,600 psi (17,926 kPa) -
Perform Flowmeter Disconnect
Procedure (WP 0086).
Replace loader control valve assembly
(WP 0261).
Proceed to Test Step 8.
0064-4
