AC 170 Governor

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   I have an Allis Chalmers 170 ( ESN: 7-3963-7, Yr: 1969 i believe) that ran away while running a grain auger. The governor self-destructed, both flyweights and pivot pins were free from the governor gear. I am needing to replace all the timing gears and am having trouble with the governor gear. The one i have is pressed onto the shaft and the distributor drive gear is keyed and held on with a nut.  This is what the agco parts book shows me but the shaft and gear are $856 from my dealer. I was hoping to find a cheaper aftermarket gear but all the gears I have found have a key slot machined into them, where as mine doesn't and was pressed on. My service manual says that the governor gear can be removed after removing a snap ring and the distributor drive gear can be removed after driving a pin out, which isn't the case with my 170. I am unsure if the aftermarket gears with the machined key slot will work for me or if they are for the governor my manual talks about. TIA 

Edited by MTGJG - 31 Jan 2019 at 12:58pm

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MTGJG Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 29 Jan 2019 Location: Volborg MT Points: 3	Post Options Post Reply Quote MTGJG Report Post Thanks(0) Quote Reply Topic: AC 170 Governor Posted: 31 Jan 2019 at 12:52pm
	I have an Allis Chalmers 170 ( ESN: 7-3963-7, Yr: 1969 i believe) that ran away while running a grain auger. The governor self-destructed, both flyweights and pivot pins were free from the governor gear. I am needing to replace all the timing gears and am having trouble with the governor gear. The one i have is pressed onto the shaft and the distributor drive gear is keyed and held on with a nut. This is what the agco parts book shows me but the shaft and gear are $856 from my dealer. I was hoping to find a cheaper aftermarket gear but all the gears I have found have a key slot machined into them, where as mine doesn't and was pressed on. My service manual says that the governor gear can be removed after removing a snap ring and the distributor drive gear can be removed after driving a pin out, which isn't the case with my 170. I am unsure if the aftermarket gears with the machined key slot will work for me or if they are for the governor my manual talks about. TIA Edited by MTGJG - 31 Jan 2019 at 12:58pm

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DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21437	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 31 Jan 2019 at 1:01pm
	Parts from a D-17 (without power steering) or a WD45 should be the same. There are thousands of them in salvage yards around the country.

SteveM C/IL Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 8509	Post Options Post Reply Quote SteveM C/IL Report Post Thanks(0) Quote Reply Posted: 31 Jan 2019 at 9:21pm
	D17 or Gleaner E should have same style without the oil fill like a 45 but like Doc says,call salvage. Drop the pan and get all the chunks located. Can likely get complete gear set from salvage as well.Heard tell of nicked gears causing problems long term...forget what that was about. I think MACK been through it.

Lonn Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 16 Sep 2009 Location: Назарово,Russia Points: 29792	Post Options Post Reply Quote Lonn Report Post Thanks(0) Quote Reply Posted: 01 Feb 2019 at 6:15am
	One nicked gear can break teeth on your new gears in a blink. I've been through that. The crank gear had a barely curled tooth (not broken) on the back side of the gear that was hard to spot and it took out teeth on a brand new cam gear. That was back when I first worked at an Allis dealer. Not a good day but a good lesson.
	-- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21437	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 01 Feb 2019 at 7:37am
	I forgot to mention the actual governor weights are unique to the 170/175 tractor. I got a new pair from AGCO 5 yrs ago and the replacement parts weren't exactly the same as originals. AGCO must have found a different vendor to make them and they can't read an engineering print correctly. If you go with WD or D17 weights, you'll need a D-17 governor spring as your high idle will be a couple hundred RPM slow using the 170 spring.

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21437	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 01 Feb 2019 at 7:01pm
	I've researched your needed parts situation. You need a governor gear/shaft assembly from a WD45 tractor. The gear and shaft are made as one part. The D-17 engine without power steering has a different (replaceable) gear and shaft. If you can find parts from a 170 or 175 that would be great, but WD45 parts are all the same except for the governor weights.

MTGJG Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 29 Jan 2019 Location: Volborg MT Points: 3	Post Options Post Reply Quote MTGJG Report Post Thanks(0) Quote Reply Posted: 03 Feb 2019 at 7:02am
	Thanks for all the help and info!