TM 5-3805-260-24
5. Check engine rpm and system pressure;
pressure should be 1000 psi; engine speed should
be 2200 rpm.
6. Write down the flow rate.
Test 55: Speed Control Valve Leakage
Tee location: The plug on the supply line near
the elevator control valve.
Blocking location: Between the elevator control
valve and the pump supply line.
WARNING: The speed control lever must be in
the HIGH SPEED position during this test.
1. Put the speed control lever in the high speed position.
2. Open the manual load valve fully.
3. Get the engine to test rpm.
4. Make an adjustment to the manual load valve to get
1000 psi.
5. Check engine rpm and system pressure; pressure
should be 1000 psi; engine speed should be 2200
rpm.
6. Write down the flow rate.
Test 56: Relief valve leakage
Tee location: The plug on the supply line near
the elevator control valve.
Blocking location:
1. Between the elevator control valve and the pump
supply
line.
2. At the outlet of the relief valve, which blocks leakage
return back to the hydraulic tank.
WARNING: The speed control lever must be in
the HIGH SPEED position during this test.
Blocking location: Same as Test 56.
1. Put the speed control lever in the HIGH SPEED
position.
2. Open the manual load valve fully.
3. Get the engine to test rpm.
4. Make an adjustment to the manual load valve to get
1000 psi.
5. Check engine rpm and system pressure; pressure
should be 1000 psi; engine speed should be 2200
rpm.
6. Write down the flow rate.
Test 57: System Oil Temperature
Tee location: The plug on the supply line near the
elevator control valve.
WARNING: The speed control valve must
be in the HIGH SPEED position during this
test.
1. Put the speed control lever in the high speed position.
2. Open the manual load valve to obtain 0 psi.
3. Get the engine to test rpm.
4. Observe the temperature gauge.
5. Write down the oil temperature.
4-56
