starter motor on bench testing and on car testing

we got given a mitsubishi M3T 49381 to pull apart and test all the components to see if they are in working conditions.

First we did a no load test on the solenoid to make sure its operating,the result for this test is 11.5v and 35.2A. then marking sectons of the starter body so we can realigned when put back together. then we take it all apart and started testing the armuture,first we did a visual inspection to check if there are any sign of overheating,burnt and any phsical damage,and there are only a few small scratches on the plate so its still serviceable,moving on to the ground circuit test by placing the black leads on the armature core the red between each of the commutator segment,result should be infinity and should have no circuit so its a pass armature,then moving on we stay placing one lead on the armture and the other one on commutator and moving the other around the commutator and see how much resistance in the circuit and we have no ohms and thats the specifications and its still serviceable,after this we meassure the diameter commutator and the undercut depth,the speciffication of a commutator should be 26.8-31mm,and our one is 20.05mm so its not serviceable and the undercut should be 0.7mm-1mm but we can only do a visual check to estimate because we dont have the tool for this test so we are moving on to the next one.
Then we placed the armture on the V block to perform a dail test and do a 360 degree turn for an acurate reading and our result is 0.05mm,specification is 0-0.2mm so ours is still serviceable.
and now its the field coil and pole shoes,we first do a visual inspection for signs of damage and we have found tears on wires and wires are loose on the coil but its still useable and then tested its resistance and showed infinity but its a pass.
And last we checked on the pinion gear and the one way clutch,first is to do a visual test for its smoothness of the movements on the shaft and also check for wares on the bushes and ours is all in good working conditions,then we reassemblred back into one piece but one of the terminals snapped off but was told to continue, and it failed on the final no load test and it could not perform.

All tests were serviceable till the final load test because of the brush came off during reasmmbling causing an incomplete circuit so it did not opereat at the end,but to solve the problem all we need to do is to replace the brush holder and it will operating properly again.