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Should I take on this project? 50s Cat D4

Don Shilling

Well-Known Member
Joined
Aug 10, 2019
Messages
147
Location
Texarkana, Texas
Occupation
Retired, multi occupation
At least you are in a positive frame of mind. Not counting my D21, most of my used equipment have been "learning experiences" to get running again! My current project is an 8N Ford that I should have spent my money on a good running one. But, I'll know just what condition its in when I get it finished.
 

Sam1734

Well-Known Member
Joined
Mar 1, 2020
Messages
108
Location
Alabama
At least you are in a positive frame of mind. Not counting my D21, most of my used equipment have been "learning experiences" to get running again! My current project is an 8N Ford that I should have spent my money on a good running one. But, I'll know just what condition its in when I get it finished.
Not trying to rob a post here, but I have a 801 power master with the 177 ci engine that is basicly similar to the 8N and I have issues with that thing too. It is my nemesis. It has literally turned me against gas burners for farm/heavy equipment.
 

Lumberjack Matt

Well-Known Member
Joined
May 14, 2021
Messages
96
Location
Oregon
Drained and removed the hydraulic pump (thing is way heavier than it looks), no water in the fluid, and the valves appear to be good. Some grit came out, but doesn't look as bad as I thought it would be. Here are the leftovers from the bottom of the tank.
PXL_20210630_035119906.jpg

Drained the clutch and flywheel compartments. Most concerning stuff was in there. Not much water, a lot of sludge, and some metal pieces. They look like gear teeth, but too small to be flywheel teeth. Since I'm pulling the engine, I'll get a better look at this later.

Transmission fluid looked good. Clearly had a little water mixed in, but I've seen way worse. No grit or gear teeth in the bottom. Big relief.

Steering clutch compartment full of water and oil. At this point it's clear I'll have to replace the steering clutches... was already kind of planning on this though because of how the levers feel when I pull them.

Final drive oil was pristine.

I filmed all the drainings here. Skip to 13:06 to see the deluge of water from the steering clutch compartment.

Next up is pulling the radiator and injection pump. I've only snapped one bolt so far...I know it sounds silly, but this is my #1 gauge of how bad a project is. There's nothing that slows down progress more than a snapped bolt.

Not sure if I should keep posting in here, don't want to keep bumping this thread and spamming the forum and annoying everyone. Let me know if I should stop, otherwise I'll keep posting updates.
 

Lumberjack Matt

Well-Known Member
Joined
May 14, 2021
Messages
96
Location
Oregon
Got the radiator and injection pump removed. Also opened up another inspection cover on the crankcase. It just seems that there is this grit/gravel all throughout the engine. It has the consistency of something you would see at the bottom of a creek bed.

Here is the output of the filter tower to the fuel rack (I believe this should be filtered fuel). The o-ring here was completely cracked in half, so that's probably the source of all the diesel in the crank case:
PXL_20210707_003132714.MP.jpg

The fuel rack itself looks like it's in good condition:
PXL_20210707_003025006.jpg

Here is the inside of the inspection cove. Rods completely covered in very loose scale. Scale also sprinkled all over everything:
PXL_20210707_002808278.jpgPXL_20210707_002820391.jpg

It's very odd. Nothing is seized or corroded through, but everything has this rust/grit completely coating it. I feel pretty confident that I can get this engine running. It will just require a complete disassembly and cleaning.
 

Puffie40

Well-Known Member
Joined
Apr 5, 2010
Messages
208
Location
Southeastern B.C.
Got the radiator and injection pump removed. Also opened up another inspection cover on the crankcase. It just seems that there is this grit/gravel all throughout the engine. It has the consistency of something you would see at the bottom of a creek bed.

Here is the output of the filter tower to the fuel rack (I believe this should be filtered fuel). The o-ring here was completely cracked in half, so that's probably the source of all the diesel in the crank case:
View attachment 241848

The fuel rack itself looks like it's in good condition:
View attachment 241847

Here is the inside of the inspection cove. Rods completely covered in very loose scale. Scale also sprinkled all over everything:
View attachment 241845View attachment 241846

It's very odd. Nothing is seized or corroded through, but everything has this rust/grit completely coating it. I feel pretty confident that I can get this engine running. It will just require a complete disassembly and cleaning.
That grit is 'rust blooms' - Those tend to appear on iron in very humid environments. Given the oil pan was full of water, that is perfect conditions for creating a sauna. A wire brush will knock them down, and once you get the motor running, the oil will prevent the rust from continuing.

It's a good call to tear down the motor. Those rust blooms would accelerate the wear inside the engine.

Not sure what the teeth you found in clutch housing might be from. The steering clutches have small teeth on the plates, but I don't know if the main clutch had any teeth aside from the splines on the input shaft.
 

Lumberjack Matt

Well-Known Member
Joined
May 14, 2021
Messages
96
Location
Oregon
Got the engine out and oil pan off. Actually looks better than I was expecting.
PXL_20210717_034850124.jpg

Lot of surface rust on the rods and crank, but bottom end of the cylinders are pristine (ignore my finger print smudges).
PXL_20210717_034958679.PORTRAIT.jpg

If I had to guess, the hangup with it fully rotating is the camshaft. That thing is rough.

PXL_20210717_035012937.PORTRAIT.jpg
PXL_20210717_035022396.PORTRAIT.jpg
 
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