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How can I remove Sludge from a Ford 800 Differential?


 
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Brett24
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PostPosted: Sat May 15, 2021 2:46 pm    Post subject: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

When I pulled the plug on my Ford 800's differential, to drain the fluid, nothing came out. I had to poke through a layer of sludge in order to get fluid to start coming out.

I used a flexible brush to reach up into the housing, through the plug-hole, and got some additional sludge out that way. But I'm pretty sure that there is a lot left in there.

Is there a good method to clean out the sludge?
 
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michford
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PostPosted: Sat May 15, 2021 3:45 pm    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

Put the drain plug back in and pour in some diesel fuel and let it sit for a while. Drain and repeat until no more sludge comes out with the diesel fuel when draining. If you want to dig in deeper, remove the axle and trumpet from the left side of the tractor and then remove the differential. Clean out sludge and reassemble.
 
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Brett24
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PostPosted: Sat May 15, 2021 5:24 pm    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

Thanks.
I chose the easier (and quicker) option.
After the last diesel rinse, I left the drain-plug out and am letting it drip all night to try to get as much of the diesel fuel out as possible.
Do I need to do anything else after that to try to get rid of diesel residue, or will it be ready to fill and run?
 
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Dean
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PostPosted: Sat May 15, 2021 5:50 pm    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

The best way is the hard way.

Disassembly followed by manual cleaning with hands, solvent and rags.

Not easy but the results are great.

Dean
 
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shaun wallace
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PostPosted: Sat May 15, 2021 6:37 pm    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

There is noocks and crannys that will never drain out. Just pouring diesel in will not loosen much of that sludge up.
 
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History Buff (MN)
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PostPosted: Sat May 15, 2021 6:56 pm    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

I too had a lot of sludge in the rear axle housing on a 650 I worked on last year.

I pulled out the PTO shaft & a couple of cans of carburetor cleaner did a pretty good job of getting most of the gunk out.
 
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Tim PloughNman Daley
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PostPosted: Sun May 16, 2021 3:34 am    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

Mineral Sprits is an excellent solvent for grease, grime, dirt, caked on crud, thick hardened oil, etc. and it won't harm any internal parts. 99.98% of all your commercially available Snake-Oil products ( MMO, Stabil, Star-Tron, et el) sold as cleaners is the same stuff mainly. Check your MSDS labels. Mineral Sprits is also the same stuff as Paint Thinner and backyard charcoal lighter fluid. Anotehr superior cleaner is a 50/50 mixture of UTF and acetone.


Tim Daley(MI)
 
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MarkB_MI
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PostPosted: Sun May 16, 2021 8:07 am    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

I would plan on changing the fluid in the transmission and hydraulic reservoir as well. They are for all intents and purposes the same reservoir. Or at least they are in my tractor, as fluid travels freely from one reservoir to the next.
 
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Sean in PA
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PostPosted: Sun May 16, 2021 8:54 am    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

CVPost-MarkB_MI wrote:
(quoted from post at 12:07:20 05/16/21) I would plan on changing the fluid in the transmission and hydraulic reservoir as well. They are for all intents and purposes the same reservoir. Or at least they are in my tractor, as fluid travels freely from one reservoir to the next.


What model tractor do you have? The 1953-1964 Ford 4 cylinder tractors all had a hydraulic sump that was separate from the transmission and separate from the rear axle. There were originally seals between the separate reservoirs and the fluids did not travel between them. When the seals wear the fluids do migrate somewhat, butt I wouldn't call that "travelling freely". If the fluids are traveling freely between them then the seals are way beyond simply leaking, they must be completely shot.
 
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MarkB_MI
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PostPosted: Mon May 17, 2021 2:02 am    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

> What model tractor do you have? The 1953-1964 Ford 4 cylinder tractors all had a hydraulic sump that was separate from the transmission and separate from the rear axle. There were originally seals between the separate reservoirs and the fluids did not travel between them. When the seals wear the fluids do migrate somewhat, butt I wouldn't call that travelling freely. If the fluids are traveling freely between them then the seals are way beyond simply leaking, they must be completely shot.

I have a '64 4000. Yes, I agree that my seals are shot, and my assumption is that they'll be in similar condition in any other tractor that still has its original seals.

How do I know the fluid can easily travel between reservoirs on my tractor? When I changed the fluid in all three reservoirs last year, I left the hydraulic drain plug out as I was refilling the differential. Fluid started coming out of the hydraulic reservoir before I'd filled the diff. I'll also note that the fluid I drained from all three reservoirs looked the same, which is to say not very good.
 
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Hiddenvalley627
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PostPosted: Sat May 22, 2021 8:13 am    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

what does utf stand for?
 
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Sean in PA
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PostPosted: Sat May 22, 2021 9:59 am    Post subject: Re: How can I remove Sludge from a Ford 800 Differential? Reply to specific post Reply with quote

Universal Tractor Fluid,sometimes called Universal Tractor/Transmission/Hydraulic Fluid. It's a modern "one-size-fits-all" fluid that can be used in transmissions, hydraulic systems, rear axles, power steering, etc. It can basically be used for everything on the tractor except the engine oil. It is low viscosity so it can be used in hydraulics and power steering, but it has extreme pressure (EP) additives so it can cling to the mating surfaces of gears in a transmission or differential, plus it has friction modifying additives to prevent slipping of wet brakes and clutches.
 
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