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 figure.
- No-load test
With switch on, adjust the variable resistance to obtain 11 V, take the ammeter reading, and then measure the starter speed. Compare these values with the specifications.
No-load test (Standard):
Voltage/Current:
MT model
MAX. 11 V/95 A
AT model
MAX. 11 V/90 A
Rotating speed:
MT model
2,500 RPM or more
AT model
2,000 RPM or more
- Load test
Apply the specified braking torque to starter. The condition is satisfactory if the current draw and starter speed are within the specifications.
Load test (Standard):
Voltage/Load:
MT model
8.0 V/8.5 N.m (0.87 kgf-m, 6.27 ft-lb)
AT model
8.0 V/9.8 N.m (1.0 kgf-m, 7.23 ft-lb)
Current/Speed:
MT model
280 A/970 RPM or more
AT model
280 A/1,000 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
4 V/680 A or less
AT model
3.5 V/960 A or less
Torque:
MT model
17.0 N.m (1.73 kgf-m, 12.5 ft-lb) or more
AT model
31.0 N.m (3.16 kgf-m, 22.9 ft-lb) or more