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645 loader crankshaft

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=157066
Printed Date: 28 Mar 2024 at 3:29pm
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Topic: 645 loader crankshaft
Posted By: CAL(KS)
Subject: 645 loader crankshaft
Date Posted: 09 Jan 2019 at 11:11am
Friend of mines 645 needs a crank.  tractor serial 2332  1968 according to what we found.  eng is a 3500 3D-07388.  he says there is a whole bunch of different casting numbers and large and small counterweights.  his crank has 2 dowels but everything he can find doesnt use the dowels.  he was told they had leakage issues and did away with the dowels.  supposedly everything crosses back to a 74028608.  this has cam drive oil pump.



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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20

Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15



Replies:
Posted By: Alvin M
Date Posted: 09 Jan 2019 at 11:50am
in PA Countryside tractor has some 717-923-0421 number on crank would be helpful


Posted By: ACjack
Date Posted: 10 Jan 2019 at 9:50am
Originally posted by CAL(KS) CAL(KS) wrote:

Friend of mines 645 needs a crank.  tractor serial 2332  1968 according to what we found.  eng is a 3500 3D-07388.  he says there is a whole bunch of different casting numbers and large and small counterweights.  his crank has 2 dowels but everything he can find doesnt use the dowels.  he was told they had leakage issues and did away with the dowels.  supposedly everything crosses back to a 74028608.  this has cam drive oil pump.


   Different casting numbers on the crankshaft? There should only be one casting number and that number is cast onto the crankshaft. If he looks closely he should find a part number stamped on the crankshaft and a serial number also stamped on it. The serial number will have the fewest digits in it. "Large and small counterweights". Is he referring to the counter weights that offset the connecting rod journals? If so those are part of the crankshaft forgings and are pretty uniform in size from one rod journal to another.
   I worked in engine assembly (dept 75) from mid 1969 to mid 1974 and every engine that was made used two dowel pins in the rear flange. I never heard of a rear end leakage problem caused by leaks due to the dowel pins.  


Posted By: CAL(KS)
Date Posted: 10 Jan 2019 at 9:56am
he can not find anything with the same casting #.  yes i was referring to the counterweights being different sizes for 426 engines.  is there a reason any other 3500 crank wouldnt work?

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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20

Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15


Posted By: ACjack
Date Posted: 10 Jan 2019 at 6:37pm
I can't say for certain if later cranks would fit. 


Posted By: SteveM C/IL
Date Posted: 11 Jan 2019 at 12:39pm
Pretty sure any cam drive you find will fit/work regardless



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