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D5 (94J) Generator issues

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4 years 3 months ago #219155 by ccjersey
Replied by ccjersey on topic D5 (94J) Generator issues
The generator has a grounded brush on the armature AND the field on your unit is connected to the ARM/GEN/positive brush. So, it will always show continuity to ground. Resistance back through the field terminal should be higher than the ARM terminal tested to the frame, but it’s still going to be low. Lift the grounded brush off the commutator and slip a piece of paper under it before testing for shorts.

D2-5J's, D6-9U's, D318 and D333 power units, 12E-99E grader, 922B & 944A wheel loaders, D330C generator set, DW20 water tanker and a bunch of Jersey cows to take care of in my spare time:D

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4 years 3 months ago #219161 by kharville
Replied by kharville on topic D5 (94J) Generator issues

The generator has a grounded brush on the armature AND the field on your unit is connected to the ARM/GEN/positive brush. So, it will always show continuity to ground. Resistance back through the field terminal should be higher than the ARM terminal tested to the frame, but it’s still going to be low. Lift the grounded brush off the commutator and slip a piece of paper under it before testing for shorts.


Thanks. I went ahead and took off the covers and found condensation and a broke spring. I will continue to disassemble and see what else I find.
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4 years 3 months ago #219169 by kharville
Replied by kharville on topic D5 (94J) Generator issues
Got it disassembled easily. Looks crudy. What is the best way to clean?

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4 years 3 months ago #219472 by kharville
Replied by kharville on topic D5 (94J) Generator issues

The simple solution would be to put a gm 1 wire alternator on her. What I did with d5 98j 525. Working like a champ.


I took the generator to a shop and found that it is not feasible to repair. I have the 1-wire solution now.

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