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Checking the stalling speed

Checking the stalling speed


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:


1. Make sure that the transmission has reached normal operating temperature (50°C - 80°C). Switch off the A/C and headlamps.

2. Put chocks under all 4 wheels.

3. Apply the handbrake fully.

4. Press the brake pedal hard.

5. Start the engine and move the selector lever to position D.

6. 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 - 2,700 rpm for D223L.


Important

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.


7. Repeat the test with the selector lever in position R. Stalling speed should be the same as above.

Results of stall test

Fault reason

Lower engine speed than stated above with both "D" and "R"

- Diminished engine output

- Fault in torque converter (freewheel)

Higher engine speed than stated above only with "D"

- Insufficient system pressure

- Faulty SLT

- Fault with C1 (slipping)

- Fault with freewheel F2

Higher engine speed than stated above only with "R"

- Insufficient system pressure

- Faulty SLT

- Fault with C2 (slipping)

- Fault with brake B3 (slipping)

Higher engine speed than stated above with both "D" and "R"

- 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