TM 5-3805-260-24
Test 36:
Flow rate of the pump and control
valve.
Test 45:
Flow rate of the pump, control valve,
and left cylinder and carry check valve.
The system components tested in Tests 6 and
45 are the same except for the right bowl cylinder. Then
the difference in flow rates must be the leakage in the
right bowl cylinder (take the test information for Test 4
away from the test information for Test 45).
The system components tested in Tests 36 and
45 are the same except for the left bowl cylinder and
carry check valves. Then the difference in flow rates
must be the leakage in the left bowl cylinder (take the
test information for Test 45 away from the test
information for Test 36).
Make a comparison of the test data with the data
given on Chart E for the specific machine under test.
The information on Chart E is for best component
performance.
Troubleshooting
PROBLEM: Leakage rates for Tests 43, 44, 45 and 46
are more than the rates shown on Chart
E.
PROBABLE REASON:
Pressure relief valve.
RECOMMENDATION FOR ACTION:
Inspect the relief valve.
PROBLEM: Leakage rate for Test 43 is more than the
rate shown on Chart E.
PROBABLE REASON:
A. Leakage in the piston seal of the ejector
cylinder.
B. Wear or damage in the ejector cylinder
assembly.
RECOMMENDATION FOR ACTION:
Disassemble and make repairs to the cylinder.
PROBLEM: Leakage rate in Test 44 is more than the
rate shown on Chart E.
PROBABLE REASON:
A. Leakage in the piston seal of the floor
cylinder.
B. Wear or damage in the floor cylinder
assembly.
RECOMMENDATION FOR ACTION:
Disassemble and make repairs to the floor
cylinders.
PROBLEM: Leakage rates in Tests 45 and 46 are
more than shown on Chart E.
PROBABLE REASON:
A. Leakage in the piston seals of the right or left
bowl cylinders.
B. Wear or damage in the right or left bowl
cylinder.
C. Loose nut on a piston.
RECOMMENDATION FOR ACTION:
Disassemble and make repairs to the right or left
bowl cylinder.
Elevator Motor Control Circuit Test (Chart F)
Test 53: System Oil Temperature
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.
1. Put the speed control lever in the HIGH SPEED
position.
2. Open the manual load valve fully.
3. Start the diesel engine.
4. Look at the oil temperature gauge.
5. Write down the oil temperature. Oil temperature must
be 150 5 F.
Test 54: System Flow Rate
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.
1. Put the speed control lever in the HIGH SPEED
position.
2. Open the manual valve fully.
3. Get the engine to test rpm.
4. Make an adjustment to the manual load valve to get
1000 psi.
4-55
