4R100 coast drum with PTO

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dhritsko
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4R100 coast drum with PTO

Post by dhritsko » Thu Jul 31, 2014 4:54 pm

I put this on the Ford forum vs. hard parts hoping more people will see . The attached picture is a new OE coast drum and now comes with a steel washer for the pump . I thought the PTO version did not use a washer . Has anyone seen this in a production unit ? Had a customer with a melt down using it , his original did not have this steel washer . Any thoughts ?
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Re: 4R100 coast drum with PTO

Post by tranibob » Thu Jul 31, 2014 5:20 pm

I don't see why it would need a washer between the drum and the pump since the drum has a roller bearing in it. Maybe the washer goes somewhere else?
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Re: 4R100 coast drum with PTO

Post by dhritsko » Thu Jul 31, 2014 7:27 pm

no instructions or anything in the box
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Re: 4R100 coast drum with PTO

Post by barrycole » Thu Jul 31, 2014 10:52 pm

The washer looks like it should be on the stator side of the pump. Can not see how the drum can ride on the backside of the stator, without a washer? The bearings look like they have replaced the bushing. What year is this intended for, or is this a retro for all years? Thanks Barry
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Re: 4R100 coast drum with PTO

Post by barrycole » Thu Jul 31, 2014 10:57 pm

Looking at the PDF the washer would be riding against the bearing. Who made this kit?
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Re: 4R100 coast drum with PTO

Post by zzyzxpat » Thu Jul 31, 2014 11:00 pm

dhritsko wrote:
> I put this on the Ford forum vs. hard parts hoping more people will see .
> The attached picture is a new OE coast drum and now comes with a steel
> washer for the pump . I thought the PTO version did not use a washer . Has
> anyone seen this in a production unit ? Had a customer with a melt down
> using it , his original did not have this steel washer . Any thoughts ?

Hope your customer with the meltdown Dave fixed his lube problem in the stator half of the pump, or he will be buying more of those.

I don't remember any washer there with the PTO setup, but can't remember for sure. The coast drum thrust off the bearing on the end of the stator support as the sungear controls the thrust. When the E4OD was designed, the OD sungear floated in the cast iron coast drum and was not a tight, press fit like the stamped steel drums, so the washer on the back of the pump controlled the drum, the bearing on the end of the stator support controlled the sungear.

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Re: 4R100 coast drum with PTO

Post by tranibob » Thu Jul 31, 2014 11:08 pm

Since day one the 4R100 with PTO use a roller bearing there and as far as i can remember never used that two tab washer. The regular non PTO would use a black plastic washer like that but I have no idea why they would use that metal washer now. It would ride against the inner race of the roller bearing but I can't see why they would do that. But it does look identical in dimension to the black plastic washer that goes between the stator and the non PTO drum.
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Re: 4R100 coast drum with PTO

Post by barrycole » Thu Jul 31, 2014 11:26 pm

That's how I see this washer would ride. I personally have not done many PTO 4R100 units too know if this right. I would do a dry assemble without, and with the washer on the pump, and see if the clearance is right.
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Re: 4R100 coast drum with PTO

Post by dhritsko » Fri Aug 01, 2014 8:44 am

I was wondering if the washer could have in a sense sealed the bearing from lube ? The steel washer fits on the stator just like the black plastic one on the non PTO . Normally when Ford does some update they put in a instruction sheet , not on this . I will let you all know if I find something out .
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Re: 4R100 coast drum with PTO

Post by jb.stp » Fri Aug 01, 2014 9:19 am

Does it still take the bearing on the end of the stator ? If so, stack the set up on the pump and see if the drum is touching the bottom of the stator.
Last edited by jb.stp on Fri Aug 01, 2014 11:26 am, edited 2 times in total.

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