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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

torque specs d4 7u serial # 12000

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kelley

12-17-2006 09:28:57

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can anyone tell me the torque on rod and main bearing bolts. also is there any adjustments to increace the engine oil presure thanks

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kelley

12-21-2006 17:44:28

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Re: torque specs d4 7u serial # 12000 in reply to Old Magnet, 12-20-2006 18:37:05

someone else just told me about injectors also,but the guy i bought it from said the oil pressure was getting low so im thinking bearings, let you know when i get time to check bearing. later kelley

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kelley

12-19-2006 15:59:04

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Re: torque specs d4 7u serial # 12000 in reply to kelley, 12-17-2006 09:28:57

thankyou for the information, i finally got the oil pan off last night. the engine has aknock in it at higher rpms, i havent had time to take the caps off yet to check the bearings. if i need bearings where is a good place to get them? i live in minnesota. thanks again

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TomA

12-21-2006 00:38:21

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Re: torque specs d4 7u serial # 12000 in reply to kelley, 12-19-2006 15:59:04

Hi Kelley,

How did you end up getting your hard bar out?
Nice to know you can get the pan off on one of those beasts in case I have to get into mine.
Are you pulling the head too? Does yours have holes
burnt through on the loader crossbeam to get a
socket on head bolts?

HT4 7U 96xx

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kelley

12-21-2006 17:19:30

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Re: torque specs d4 7u serial # 12000 in reply to TomA, 12-21-2006 00:38:21

i hope you never have to take pan off,not an easy job.i raised the front as high as it would go,but still ended up cutting the bar in two to get it out. i cut it between the loader frame and engine so ican get at it to weld it back together again,and there is room there to weld plates along the sides and underneath. i also had to cut the loader loose from the front bar so i could get enough clearance to tip oil pan down over front bar. alot of work but easier than taking loader off.i just bought this about 3 weeks ago so everything is new to me.im used to working on my 2 cylinder jds,later kelley

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Old Magnet

12-19-2006 07:36:22

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Re: torque specs d4 7u serial # 12000 in reply to kelley, 12-17-2006 09:28:57

Hi Alcat,
The torquing of bolts is in fact stretching the bolts to a controlled limit. No reason not to follow this procedure as described by the manufacturer. You are correct on the oil pressure, low oil pressure is usually due to bearing wear. Shimming the relief valve may help on a borderline case but it does not assure delivery if you have excessive clearances.

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Bob Plumadore

12-17-2006 18:31:48

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Re: torque specs d4 7u serial # 12000 in reply to kelley, 12-17-2006 09:28:57

Forget about the cotter pin holes. tighten both rod and mains to 30 FLBs the add a quarter of a turn. you can help the OP by adding shims to the relief valve. I usually install a new spring and put back the original shim plus 1 thin one.

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AlCat

12-19-2006 00:39:05

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Re: torque specs d4 7u serial # 12000 in reply to Bob Plumadore, 12-17-2006 18:31:48

I do not think that the 7U was fitted with stretch bolts on either the mains or the rods,if your bolts has holes for cotter pins and the nuts have slots they are not stretch bolts and require torquing as OM stated,I doubt very much if messing with the relief valve will increase the oil pressure,usually low oil pressure will be caused by worn crank bearings or worn oil pump.
AC

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Old Magnet

12-17-2006 13:39:35

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Re: torque specs d4 7u serial # 12000 in reply to kelley, 12-17-2006 09:28:57

Rod torque 58 ft.lbs.
Mains 120 ft.lbs.
Always advance to the cotter pin hole alignment.
The oil pump pressure does not have an adjustment feature.

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