Engine Died then came back to life

[sntrym95]

I just had a CS130 back bearing go bad it was a knocking sound. Since it was still under warranty from the local electric shop (it's a 220amp alt), I took it in and I watched them replace it.

You need to take the alternator apart as the bearing presses in from the inside so the whole coil assembly has to come out. Took the guy 5 minutes maybe to replace it. I diagnosed the noise with a screwdriver - flat end on the alternator and the plastic end to my ear. Tried a few different parts like the A/C compressor and idler pulley then the alternator to find it.

[76C10Stepside]

Originally Posted by sntrym95

I just had a CS130 back bearing go bad it was a knocking sound. Since it was still under warranty from the local electric shop (it's a 220amp alt), I took it in and I watched them replace it.

You need to take the alternator apart as the bearing presses in from the inside so the whole coil assembly has to come out. Took the guy 5 minutes maybe to replace it. I diagnosed the noise with a screwdriver - flat end on the alternator and the plastic end to my ear. Tried a few different parts like the A/C compressor and idler pulley then the alternator to find it.

Thanks, Mike! I'll try the screwdriver test. Did the coil assembly have any wires that had to be desoldered or cut to remove it? The service manual I found mentions that, but does not say if it's necessary just to replace the bearings.

I took a wiper motor apart the other day, and one of the field coil wires was broken, but I could not get to the field to resolder it (field coil permanently mounted inside). Ended up installing another motor.

[Mr_Rich]

Originally Posted by 76C10Stepside

Thanks, Mike! I'll try the screwdriver test. Did the coil assembly have any wires that had to be desoldered or cut to remove it? The service manual I found mentions that, but does not say if it's necessary just to replace the bearings.

I took a wiper motor apart the other day, and one of the field coil wires was broken, but I could not get to the field to resolder it (field coil permanently mounted inside). Ended up installing another motor.

The CS130 alts. can last a long time. That screwdriver trick (large screwdriver) was one my Dad taught me when I was young. The field coil wires are crimped to the diode trio, IIRC. I still have a disassembled CS130 in a box. I should take some pics for you. That 140 amp upgrade kit I mentioned earlier was called Quick Start, part no#D1-7140. I bought it at Summit Racing mail order at least fifteen or more years ago. A lot of these parts are obsolete and are going to be hard to find because there is more available for the newer 2K-up trucks.

[sntrym95]

Originally Posted by 76C10Stepside

Thanks, Mike! I'll try the screwdriver test. Did the coil assembly have any wires that had to be desoldered or cut to remove it? The service manual I found mentions that, but does not say if it's necessary just to replace the bearings.

I took a wiper motor apart the other day, and one of the field coil wires was broken, but I could not get to the field to resolder it (field coil permanently mounted inside). Ended up installing another motor.

Offhand I'm not sure if there were any wires he had to remove to get the assembly out, although I assume there's a couple, one for the charging post the other for the activation wire. Mind you this is a custom aftermarket 220a version, not the GM original so it might have plugs/connectors instead of something being soldered.