Allis Chalmers 620: Tractor Engine Repair Rebuild  -- Tractor Maintenance Discussion Forum and Review Allis Chalmers 620: Tractor Engine Repair Rebuild -- Tractor Maintenance Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Tractor Engine Repair Rebuild Forum

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 03-30-2004, 19:13 Post: 81616
David Scott
2004-03-30 19:13:55
Post: 81616
 Allis Chalmers 620

Just put all new belts on, adjusted clutch to factory setting..seems underpowered now...push the clutch in and the idle gets higher...Ran fine until I did this...now it is sluggish, doesn't want to run..also just rebuilt the carb...had the motor out to replace the starter...Can anyone help ???






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 05-21-2004, 10:43 Post: 86516
rbkuconn



Join Date: Oct 2003
Location: Suffield, CT.
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 15
 Allis Chalmers 620

I'm confused-my AC 620 (which I sold for a JD 4200) was a hydrostatic drive. The "clutch" you mention-if you mean the dual belt idler setting of the spring, it should be 10-7/8" (refer to the manual for location).
Check the carb settings and VERY important-check the point box. It was my experience that due to it's aluminum construction, it would distort when hot, allowing it to move and throw the timing off. Good Luck!






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