Starter Motor Inspection

Starter

INSPECTION

1. SWITCH ASSEMBLY
Using a circuit tester (set to "ohm"), check that there is continuity between terminals S and M, and between terminal S and ground.
Also check to be sure there is no continuity between terminal M and B.






2. SWITCH ASSEMBLY OPERATION

NOTE: Test period of each test must be within short time (3 - 5 seconds).

1. Vacuum test
Disconnect the harness from terminal M and connect it as shown in the figure. Make sure the pinion gear sticks out.






2. Hold test
Make sure the pinion gear remains stick out even after disconnecting terminal M in the above condition.






3. Return test
Connect the positive terminal to terminal S and the negative terminal to terminal M and starter body to pull the pinion gear at the main contact point. Make sure the pinion gear returns to its original position when the terminal S is disconnected.






3. 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.






1. No-load test
With switch on, adjust the variable resistance until the voltage is 11 V, read the value of ammeter to measure rotating speed. Compare these values with the standard.

No-load test (standard):

Voltage/Current Max. 11 V/90 A or less

Rotating speed 1,900 rpm or more

2. 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 8 V/11.1 N.m (1.1 kgf.m, 8.2 ft.lb)

Current/Speed 370 A/910 rpm or more

3. Lock test
With the starter stalled, or not rotating, measure the torque developed and current draw when the voltage is adjusted to standard voltage.

Lock test (standard):

Voltage/Current 3 V/750 A or less

Torque 15.5 N.m (1.6 kgf.m, 11.4 ft.lb)