Checking the stalling speed
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Checking the stalling speed
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This test indicates the general condition of the engine and transmission by checking the maximum engine speed in positions D and R. To check the stalling speed:
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1.
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Make sure that the transmission has reached normal operating temperature (50°C - 80°C). Switch off the A/C and headlamps.
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2.
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Put chocks under all 4 wheels.
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3.
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Apply the handbrake fully.
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4.
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Press the brake pedal hard.
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5.
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Start the engine and move the selector lever to position D.
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6.
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Give full gas and quickly read off the highest engine speed. "Stall" speed will be 2,250 - 2,450 rpm for B205E, B235E/R, B308E and 2,600 - 2,800 rpm for D223L.
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Important
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Do not run for longer than 5 seconds when testing as the oil temperature can rise above the permitted level. Wait at least 1 minute between tests.
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7.
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Repeat the test with the selector lever in position R. Stalling speed should be the same as above.
Results of stall test
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Fault reason
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Lower engine speed than stated above with both "D" and "R"
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- Diminished engine output
- Fault in torque converter (freewheel)
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Higher engine speed than stated above only with "D"
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- Insufficient system pressure
- Faulty SLT
- Fault with C1 (slipping)
- Fault with freewheel F2
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Higher engine speed than stated above only with "R"
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- Insufficient system pressure
- Faulty SLT
- Fault with C2 (slipping)
- Fault with brake B3 (slipping)
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Higher engine speed than stated above with both "D" and "R"
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- Insufficient system pressure
- Faulty SLT
- Fault with brake B5 (slipping)
- Fault with oil pump
- Oil leakage in one of circuits for D or R
- Blocked oil strainer
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