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Case Tractors Discussion Forum
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Re: Case air cond. guru,s???

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B-maniac

05-17-2013 21:55:18
96.35.87.221



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Is it possible that the 4 position speed control switch or the temp control that it feeds or the both of them are responsible for "eating up " that one volt of needed power? I know there is full (12,5 or so) comming up to those controls ans have suspected them but just can't bring myself to believe that clutch magnet is THAT fussy. Thanks for your post and I'm sure there are more that had this problem but it's late , will probably hear from them tommorrow.

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DKase

05-18-2013 04:55:41
75.102.180.184



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 Re: Case air cond. guru,s??? in reply to B-maniac, 05-17-2013 21:55:18  
Every connection, and every foot of wire results in voltage drop. My guess is that heavier wire would do you more good than a different switch. My experience with switches is that when they go bad they go really bad, and voltage drops more than what you have. The guy that services my AC told me that it is a common problem on older machines, and he installs relays on all of them after seeing how the relay worked on mine.

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RGMartin

05-18-2013 06:49:39
98.16.75.165



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 Re: Case air cond. guru,s??? in reply to DKase, 05-18-2013 04:55:41  
Quoting Removed, click Modern View to see

This. 970s light switch caused me similar issues last fall. Phantom voltage drops, constantly blowing the circuit breaker, lights only getting 8V, even though the meter said 13 with them unplugged...
Face it, these girls aren't supposed to still be in service.



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B-maniac

05-18-2013 09:46:28
24.231.209.139



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 Re: Case air cond. guru,s??? in reply to RGMartin, 05-18-2013 06:49:39  
Thanks for all your input guys. I believe I will mount a relay up by the hi/lo shut-offs in front of radiator/condenser and use the wire from cab control (11.5 V) after it goes through the hi/lo safety switches to control the relay which I will wire to the bat term on back of alternator and output to compressor clutch. Cab still controls everything and will still have hi/lo protection. Thanks again. I knew someone had allready had this problem somewhere. RB

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