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  7. D4 7u head removal

D4 7u head removal

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4 years 6 months ago #214433 by kingmike
D4 7u head removal was created by kingmike
Does anyone have a step by step for what to remove to get the head off? I dont have a manual that covers this but it looks like the rockers will have to be removed and all of that in order to get to the middle bolts to remove them. Does the timing have to be reset after the head is removed? I hope not! Thanks for any advice. I dont guess I've fooled with removing a head with center bolts before that I remember. Was hoping to leave most stuff in place when it got pulled out.

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4 years 6 months ago #214436 by Irwin
Replied by Irwin on topic Head removal
Unhook oil line to the rockers that have to come off.mark injecter lines and remove.exhaust /intake can stay but will ad weight.my pony was off before i removed head.i reused gasket per manual as it was good. Good luck. You should be able to goggle it on youtube.

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4 years 6 months ago #214437 by kingmike
Replied by kingmike on topic D4 7u head removal
Oh yea, meant to say that I have both manifolds off already. My pony doesnt work so I've mostly removed it already. I guess I dont have to remove all of the rockers then? What about the push rods? Does it need to be re-timed if I take all of this off? I couldn't find anything specific about this particular motor on you tube or anywhere.

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4 years 6 months ago #214468 by Old Cats
Replied by Old Cats on topic D4 7u head removal
It should not need re-timed but the valves will need adjusted of course after head removal. If I remember correctly the water pump will need to be unbolted but not have to be removed entirely. I seem to remember not removing mine but can't remember why other than some goober welded the belt adjustment pulley and getting the belt on and off is tough to do.

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4 years 6 months ago #214507 by Irwin
Replied by Irwin on topic Head removal
Yea ,rockers come off as one .then push rods.thats easy peasy.just lay them the valve cover.on my rd4 the water pump is not on the head.dont know about yours.dont slide the head around on block as combustion chambers hang down just a bit.good luck

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4 years 6 months ago #214509 by kingmike
Replied by kingmike on topic D4 7u head removal
Yea I see on mine that the water pump has an upper and lower chamber so dont have to fully remove it doesnt look like. I loosened all the rockers and top nuts today. It looks like it can all come out as one piece with the decompression bar attached if I take off all the bolts that hold the valve flange on. Re-setting all of those valves is probably going to be somewhat of a pain but in well. That decompression rail is directly over one row of bolts on mine, so it looks like it all has to go to get the head loose.

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4 years 6 months ago #214510 by kingmike
Replied by kingmike on topic D4 7u head removal
Can it be lifted off by using the exhaust manifold studs? I dont see any other way on that side. I've rigged up a 2x6 lift overhead so I can lift it straight up. Does anyone know the weight of this? My estimate is around 300 lbs but hopefully less?? How did you guys lift it up or what did you hook to when you did it?

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4 years 6 months ago #214520 by neil
Replied by neil on topic D4 7u head removal
Can't be that much because I can lift one. I'd guesstimate more like 100-150. You can use the manifold studs on one side - can't remember what's on the other side
Cheers,
Neil

Pittsford, NY

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4 years 6 months ago #214521 by kingmike
Replied by kingmike on topic D4 7u head removal

Can't be that much because I can lift one. I'd guesstimate more like 100-150. You can use the manifold studs on one side - can't remember what's on the other side


The exhaust side has studs. The other side or intake just had bolts. Figured I'd put one or two back in on the intake side and use the studs on the exhaust side but difnt want to break off anything if you think.thatll work??

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4 years 6 months ago #214537 by neil
Replied by neil on topic D4 7u head removal
That should work fine Mike but one thing you can do first before lifting is to "break the seal". Get a bar and free the adhesion of the head to the block, and then go ahead and lift. Four points (front rear each side) should be sufficient. If you first back out the studs so you know they unwind, if the worst should happen and a stud breaks, then you know you can easily back the broken part out. But I'd very much doubt you'll break one unless you whale on it and you seem like a sensible guy that wouldn't do that : ) :thumb:
Cheers,
Neil

Pittsford, NY

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  1. Forum
  3. Antique Caterpillar Machinery Owners Club
  5. DISCUSSION
  7. D4 7u head removal
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