Mystery WD45 engine
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=118866
Printed Date: 28 Jun 2025 at 10:34pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Mystery WD45 engine
Posted By: 45 turboa-
Subject: Mystery WD45 engine
Date Posted: 11 Feb 2016 at 7:55pm
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I pulled the engine on my 45 ring gear is bad but I also pulled off the pan the engine had a raddle under a load at full throttle. What I found the crank had .042 thou.end play the thrust brg was wore on the front flange next to the timing gear the back side was fine the brg is original. Any ideas ? ------------- turbocharged |
Replies:
Posted By: kev/ont
Date Posted: 11 Feb 2016 at 8:16pm
| My guess would be at some point in the tractors life it has had an operater who drove with their foot on the clutch pedal. Thus keeping pressure against the front surface of the bearing consistantly. Which wears it out. |
Posted By: TramwayGuy
Date Posted: 11 Feb 2016 at 8:37pm
| Or a lot of belt work; with the clutch pedal locked forward for long periods of time. |
Posted By: Don(MO)
Date Posted: 11 Feb 2016 at 8:38pm
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If it has the right bearing up front and you don't find the crankshaft was reground
wrong, then I'm with Kevin the tractor spent a lot of time with the foot clutch pushed in, I have heard back in the days of tractors spending a lot of time on belt-work like on a silo blower and the clutch might be locked out weighting for the next wagon to come in to be unloaded and that setup the need to replace a lot of pressure-plates and bearing replacement too.
------------- 3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep. |
Posted By: Don(MO)
Date Posted: 11 Feb 2016 at 8:39pm
LOL you type faster than I can. Good job. ------------- 3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep. |
TramwayGuy wrote:Posted By: CrestonM
Date Posted: 11 Feb 2016 at 9:08pm
That doesn't make sense to me. Why wouldn't they just disengage the belt pulley, rather than locking the clutch out?
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Posted By: Don(MO)
Date Posted: 11 Feb 2016 at 9:12pm
Without the after market disengage rod then you have to put the belt pulley out a little bit and re-lock it to stop it and most WC/WD/WD45's didn't have the rod. ------------- 3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep. |
Posted By: 45 turboa-
Date Posted: 11 Feb 2016 at 9:21pm
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I don't think you guys get what I'm saying, the thrust brg is wore on the flange next to the timing gear in front of the engine . I sleeved this engine about 20 years ago I didn't change the mains they looked good and i shimmed to get the correct clearance .Its like there would been pressure pushing the crank rearward. I've overhauled alot of 201-226's but I have never seen the thrust wore on the front side.Any other thoughts ? ------------- turbocharged |
Posted By: Don(MO)
Date Posted: 11 Feb 2016 at 9:28pm
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OK, sorry I miss-read you post, the cam thrust bolt was set too tight maybe?
------------- 3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep. |
Posted By: 45 turboa-
Date Posted: 12 Feb 2016 at 1:03pm
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The engine thats in my WD45 came out of my super 100 combine the engine had never been overhauled the crankshaft still looks great but I'm going to mic. it anyway.It has great oil pressure but I still can't understand why it has only ware on the front side of the thrust brg. ------------- turbocharged |
Posted By: Bill_MN
Date Posted: 12 Feb 2016 at 4:56pm
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Only thing that could put rearward thrust on crankshaft is the hand crank or some front pulley driven contraption. I see four possibilities, in order of likelihood: -a bent crank nose slightly tilting the crank gear backward enough to dig into the bearing -the presence of a front mount hydraulic pump or power steering pump on the tractor at one time. If someone had a pump mounted on it and had the bracket mounted such that the pump was pushed tight against the front pulley, or there was barely enough space to squeeze it in there that would cause wear over time. -A HELL of a lot of hand cranking! -the much, MUCH less likely possibility that the block had core shift during casting and the bearing journal was out of position from the time it was new. ------------- 1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow |
Posted By: 45 turboa-
Date Posted: 13 Feb 2016 at 9:59am
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The pulley runs true. No hydraulic pump yet I have every thing made up to put it on with a vickers vane pump, a Simplicity flex coupling ,pulley is turned down and drilled for the coupling it's going to be nice to have a fully live system.Also I'm putting power steering witch will be nice the char lynn unit is going between the front end casting and the u joint.As far as cranking I haven't cranked it in the last 20 years its still a mystery why the thrust is worn like that. ------------- turbocharged |
Posted By: DaveKamp
Date Posted: 14 Feb 2016 at 12:10pm
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Is the thrust wear even all the way around? If not, it'd be a crank that isn't quite true. Just going over things in my head that would tend to push the crank in ANY direction (foreward or aft). Guys have already mentioned the clutch, but it'd push forward. Angle-cut gears will place lateral force on a shaft, and do same to whatever's driving it. Oil pump drive wouldn't... A connecting rod facing the wrong way would probably be catastrophic, but mebbie?? A wrist pin that's off center? I'd look closer at the rods and see if one of 'em suggests scuffing at the rear side... Also, look at the BACK of the flywheel- do you see any suggestion of something getting jammed in there at some point? Perhaps a mouse-nest full of walnutshells, or ice? How are the transmission splines? could it be worn enough to snag the trans shaft and pull rearward? How is the alignment between your water pump, generator, and crank pulley?  That's wierd, but there's an answer, just gotta find it... ------------- Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest. |