Mechanical System Tests

STALL TEST
The object of this test is to check the overall performance of the transmission and engine by measuring the stall speeds in the D and R positions.

NOTICE:
- Do the test at normal operating fluid temperature.

Normal fluid operating temp: 50° - 80°C (122° - 176°F)

- Do not continuously run this test longer than 5 seconds.
- To ensure safety, conduct this test in a wide, clear, level area which provides good traction.
- The stall test should always be carried out in pairs. One technician should observe the conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test.

MEASURE STALL SPEED.



- Chock the 4 wheels.
- Fully apply the parking brake.
- Connect a tachometer to the engine.
- Start the engine and check idle.
- Keep you foot pressed firmly on the brake pedal.
- Shift into the D position.
- Fully depress the accelerator pedal.
- Quickly read and record the stall speed.

Stall speed in D: 2,600 ± 150 rpm

- Do the same test in R position.
- Quickly read and record the stall speed.

Stall speed in R: 2,600 ± 150 rpm

EVALUATION
- Evaluate the results of the stall test according to the table below.





TIME LAG TEST
When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag before the shock can be felt. This is used for checking the condition of the O/D direct clutch, forward clutch, direct clutch, and first and reverse brake.

NOTICE:
- Do the test at normal operating fluid temperature.
- Be sure to allow 1 minute interval between tests.
- Take 3 measurements and take the average value.

MEASURE TIME LAG.



- Fully apply the parking brake
- Start the engine and check idle speed.

Idle speed: 650 ± 50 rpm
(In N position and air conditioner OFF)

- Shift the shift lever from N to D position.
- Using a stop watch, measure the time it takes from shifting the lever until the shock is felt.
- In same manner, measure the time lag for N R.

Time lag:
- N -> D Less than 1.2 seconds
- N -> R Less than 1.5 seconds

EVALUATION
- Evaluate the results of the time lag test according to the table below.