Farm Equipment - 200 Cab fan

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200 Cab fan

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=164119
Printed Date: 14 Oct 2025 at 8:14pm
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Topic: 200 Cab fan

Posted By: Rhoadesy_65
Subject: 200 Cab fan
Date Posted: 05 Sep 2019 at 8:25am

My 200 has the factory cab without A/C. The blower fan only works in high, makes a terrible noise, and turns on and off intermittently. I would like to get it working again. Any suggestions? I had the shield off the other day and couldnt find any loose wires.

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Farmin' with 1981 7010 PD, 1983 6080, 1983 8010, Gleaner R42 in Darke County OH

Replies:

Posted By: Joe(TX)
Date Posted: 05 Sep 2019 at 9:47am

Working only on high could be the switch. The switch has a resistor for low speed. Off and on would point to the motor drawing too much current and tripping the circuit breaker. Noise could mean a bad motor or a fan problem.

At SN 4001, there were a lot of changes.

Blower motor PN 70257336 prior to 4001, PN 70256769 4001 up. These are 2 wire motors.

Controls were also different.

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1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A

Posted By: plummerscarin
Date Posted: 05 Sep 2019 at 11:43am

On ours, the intermittent problem is a loose connector at the base of the cab.

Posted By: DanWi
Date Posted: 05 Sep 2019 at 2:26pm

For starters spray the ends where the shaft goes thru with your favorite oil should help. It does help a little if you can get the fan out to do it, then you can turn it on end and let oil run down the shaft.