MAIN cooling fan and relay problem exposed....
Thread Starter
Drifting
Joined: Oct 2003
Posts: 1,594
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From: CALGARY ab
MAIN cooling fan and relay problem exposed....
SYMPTOM:determine to find out why my fan relay was over heating and burning out.
PROBLEM:::main fan motor was dragging (lack of lube over the years), brushes contaminated with dirt. intermittent failure( when it is suppose to be running)
SOLUTION: dissassembled, checked the comutater to ground (check for circuit to ground, shorts). remachined/resurfaced, clean brush holders, installed new front bearing, cleaned and re lube rear bearing, reassembled. current draw is now less 8 amps, where before was in excess of 15 amps. total time for repair was about 1 1/2 hours...relay/fan are now cooler when operating.
PROBLEM:::main fan motor was dragging (lack of lube over the years), brushes contaminated with dirt. intermittent failure( when it is suppose to be running)
SOLUTION: dissassembled, checked the comutater to ground (check for circuit to ground, shorts). remachined/resurfaced, clean brush holders, installed new front bearing, cleaned and re lube rear bearing, reassembled. current draw is now less 8 amps, where before was in excess of 15 amps. total time for repair was about 1 1/2 hours...relay/fan are now cooler when operating.
Thread Starter
Drifting
Joined: Oct 2003
Posts: 1,594
Likes: 0
From: CALGARY ab
Originally Posted by 65Z01
Good trouble shooting job; thanks for the follow up solution. 
