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Using a Grain Truck as a Dump Truck
I have a short term need for a dump truck to haul a mix of dirt and shale rock as well as crusher-run gravel. The shale rock is five miles away, the gravel is twenty minutes, not sure the mileage. Found a shed kept '68 C50, 350cu.in., four speed w/2spd axle in real nice condition inside and... -
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Cat wet clutch cold weather question
'67 D4D. It has been abnormally cold for two weeks, some nights zero or below. Most days in the mid 30's. Machine had been sitting for over a month since the last time it was started. One day last week it was 37° when a fellow interested in buying the dozer asked to look at it. After a (too... -
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D4D lift cylinder O-rings
Too lazy to search. '67 D4D 78A7177. Need an O-ring number. The lift cylinder hydraulic hoses bolt to hard lines that attach to the cylinders. One of mine leaks at the bolt flange even with the machine setting. This is just a guess, it looks like if the four bolts holding the hose flange to... -
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Hard bar vs. spring 2.0
The hard bar versus spring question posted by Nutwood got me to thinking. If the transverse spring a D4D has under the engine and setting on both track frames is the same setup as what he was asking about, how bad is it that the spring ends are worn to a thin edge? Shims have been inserted to... -
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D4D final leak
"67, D4D, 78A7177, direct drive. Guess it was bound to happen, It has been just sitting there since spring but for a couple hours of use two weeks ago. There is now a small but growing spot of oil on the inner track below the left hand rear drive sprocket. The shop manual I have does not... -
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About how much does a D4D weigh with...
Best guess, the weight of a direct drive '67 78A D4D with blade, draw bar and ROPS. From a search I find what I think might be a bare weight of 11,000. -
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need part numbers for an old timer
Once again.... '67 D4D Cat 78A7177. Boy, it seems like I've typed that a lot. Local Cat house is having trouble coming up with part numbers for the clutch oil pump-to-clutch-cover gasket and the clutch oil screen-(two needed)-to-clutch-cover gasket. The old machines are not in their... -
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Source for used parts
Looking for a recommendation for a source of used parts. Need some pieces for my D4D. Someone located east of the Mississippi would be nice. Thanks! -
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D4D wet clutch removal
This started as an oil change when oil level was found to be low. 1967 D4D 78A7177. Pulled clutch drain plug--maybe one quart of oil. Hmmm, that ain't good! Removed oil pump screen to find the screen plate and bolts all but falling out, guess that's where the oil went. Have run this thing... -
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repairing a hydraulic hard line
One of the lift cylinders hard lines on a D4D dozer is pinched. Is it a fools ploy to cut out the flat section and heliarc it back together? Could go a step further and weld a slip sleeve over the repair to help with support. The line in question is on the front of the RH cylinder attaching... -
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D4D question about the wet clutch
'67 78A7177. Clutch oil is low so I am going to change it. This came up once before and someone mentioned something about cleaning a screen for the clutch oil pump but my manual makes no mention of such. How is it accessed? In fact, where is the drain plug for the clutch? A related question... -
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What tracks should be on my D4?
'67 D4 78A7177. Looking for a used set of chains or tracks. I was told both D4 dozer and 941 loader tracks fit but on further investigation it seems there is more to the story than that. Among the possible variables; dry unsealed pins, dry sealed pins, 1.99" or 2.12" bushing diameters, thick... -
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Is TO-4 spec a current spec?
I have been looking for clutch and final drive oil for a '67 D4 but don't find any claiming to meet TO-4. Is TO-4 a current designation or is CAT calling it something else? TO-2, which I think is an even older spec is still listed on several oils. Maybe someone can give a short run-down of... -
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Flywheel Clutch oil--what current oil to use?
78A7177 "67 model D4, direct drive. Book calls for 30w/MIL-L-2104A, what currently available oil is correct for the clutch? Mine is low and not knowing what is in there I'd like to change it so need the rough fill amount too. Thanks EDIT--Just ran across this: MIL-L-2104-A was replaced by... -
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Looking for a used equipment parts dealer in the southeast
Will be looking for a set of used tracks and maybe idlers for a Cat D4 after the first of the year. According to the internet, there seems to be plenty of used parts in Portland but I'm not having much luck near NC. -
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Tired old question about suitable current lubricants
1967 D4 direct drive 78A7177. Have misplaced the info old magnet provided a while back about what current lubes to use in old machines as well as quantities. Believe this machine to be from the "one fluid goes in everything" generation. Mainly interested in the wet clutch but think I'll go... -
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Lift cylinders out of time on D4 Cat
The lift cylinders on my D4/D4D do not move together; the right lifts the blade 4+ inches before the left moves and it lowers it 4+ inches before the left moves. Once the blade has reached maybe a foot off the ground the blade levels but on the way down it lists to one side until it hits the... -
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Draining hydraulic tank on D4
Would like to drain the hydraulic tank to replace a piece of hose in the pump inlet line while saving the fluid. Have found only a small plug on the right side in a not to easy place to get a bucket under. Is opening a line into a bucket a possibility? '67 D4/D4D 78A7171. -
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D4 lift cylinder mount
Have the rod out of one cylinder so just the tube is mounted to the tractor. Noticed during disassembly there is a good bit of play where the cylinder mounts to the round crossmember/yoke (whatever it is called) that passes behind the radiator. How difficult a job is it to renew whatever is in... -
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D4 clutch brake shoe question
After having the brake shoe relined and getting the adjustment points to adjust again I turned to the service manual. In the adjustment section there is something about a small 3/16"-1/4" pin being in a hole low, almost to the tip of the shoe. The hole is there but no pin, can't see a reason...