Performance Test
The starter should be submitted to performance tests whenever it has been overhauled, to assure its satisfactory performance when installed on the engine.
Three performance tests, no-load test, load test, and lock test, are presented here; however, if the load test and lock test cannot be performed, carry out at least the no-load test.
For these performance tests, use the circuit shown in Fig 1 .
- No-load test
With switch on, adjust the variable resistance for the voltage to obtain 11 V, read the ammeter and measure the rotating speed. Compare these values with the specifications.
No-load test (Standard):
Voltage / Current
MT model
11 V / 90 A or less
AT model
11 V / 90 A or less
Rotating speed
MT model
1,820 RPM or more
AT model
1,720 RPM or more
- Load test
Apply the specified braking torque to starter. The condition is satisfactory if the current draw and rotating speed are within specifications.
Load test (Standard):
Voltage / Load
MT model
8 V / 7.76 N.m (0.79 kgf-m, 5.7ft-lb)
AT model
8 V / 12.78 N.m (1.30 kgf-m, 9.4 ft-lb)
Current / Speed
MT model
280 A / 900 RPM or more
AT model
370 A / 850 RPM or more
- Lock test
With the starter stalled, or not rotating, measure the torque developed and current draw when the voltage is adjusted to the specified voltage.
Lock test (Standard):
Voltage / Current
MT model
3 V / 900 A or less
AT model
3 V / 900 A or less
Torque
MT model
13.62 N.m (1.38 kgf-m, 10.0 ft-lb)
AT model
15.42 N.m (1.57 kgf-m, 11.3 ft-lb)