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trucktech
Member
Member # 23632
Reged: 08/11/02
Posts: 665
Loc: Mulhurst Bay Alberta
Cat 3304 torque specs
#1045690 - 02/01/03 12:27 PM

Does anyone have torque specs for the main, rod and head bolts on a 3304 cat diesel? Without buying a manual, its hard to find any info on rebuilding this engine. I tried the Cat SIS site , but that is totally useless. I could also use the valve adjustment specs as well. Thanks.

trucktech
Member
Member # 23632
Reged: 08/11/02
Posts: 665
Loc: Mulhurst Bay Alberta
Re: Cat 3304 torque specs new
#1047751 - 02/02/03 06:02 PM

What?? Nobody has ever rebuilt one of these before?? Someone must have information on a 930 loader or 3304 Cat diesel.

BigYellowIron
Member
Member # 12093
Reged: 03/18/01
Posts: 69
Loc: Kearney, MO
Re: Cat 3304 torque specs new
#1048538 - 02/03/03 12:47 AM

I can get the specs for you, It will be a torque and turn.

I think it is like 50 ftlbs and then 90 degrees, but i will have to find out forsure.

You have access to sis web? Why can't you find it on there, thats where I would find it.

Adam

Kenworth
Member
Member # 1796
Reged: 01/07/01
Posts: 5372
Loc: British Columbia Southern Corner of the Westcoast
Re: Cat 3304 torque specs new
#1048545 - 02/03/03 12:53 AM

I guess Finnings would be kinda upset if you asked them as they are not getting the job and charge double what you are charging maybe find a Finnings mechanic and buy him a beer he may show you his repair manuals

KW

trucktech
Member
Member # 23632
Reged: 08/11/02
Posts: 665
Loc: Mulhurst Bay Alberta
Re: Cat 3304 torque specs new
#1048784 - 02/03/03 08:58 AM

Adam, I have access to sis but can only get info on truck engines. I was using a buddy's access through truck.cat.com with his log-on. The engine s/n is 78P28565 and it doesn't show up. I usually don't do these, but my neighbour seized the engine in his 930 loader and he is my butcher, so I couldn't say no.
Any help would be greatly appreciated. Thanks Dan.

Edited by trucktech (02/03/03 10:37 AM)

trucktech
Member
Member # 23632
Reged: 08/11/02
Posts: 665
Loc: Mulhurst Bay Alberta
Re: Cat 3304 torque specs new
#1048791 - 02/03/03 09:11 AM

Kenworth, I asked a couple of guys who work for Finning, but they work in the forklift div. and they don't use that engine. I tried to buy a manual but they wanted $600. and it was three weeks away. And yes, they would be about double the end cost at around $10,000. for the complete job. Don't know anyone at the construction equipment div though, its a completely different field and I never run into those guys. I don't even know where the shop is since they moved off the Langley bypass.

BigYellowIron
Member
Member # 12093
Reged: 03/18/01
Posts: 69
Loc: Kearney, MO
Re: Cat 3304 torque specs new
#1048985 - 02/03/03 11:38 AM

GIve me until this evening, I work nights at the cat dealer I will look it up.


Adam

BigYellowIron
Member
Member # 12093
Reged: 03/18/01
Posts: 69
Loc: Kearney, MO
Re: Cat 3304 torque specs new
#1049795 - 02/03/03 08:46 PM

The Mains torque to 30 +- 3 ft lbs Then turn them an additional 90 degrees.

The rods are the same as the mains

The head is a three stage process first torque them to 115 ft lbs then 190 ft lbs then do them again to 190ft lbs
Make sure you start in the center and work your way out.

Hope that helps

Adam

trucktech
Member
Member # 23632
Reged: 08/11/02
Posts: 665
Loc: Mulhurst Bay Alberta
Re: Cat 3304 torque specs new
#1049930 - 02/03/03 09:37 PM

Thanks Adam that helps a lot. You would think that they would have a more accurate torque than 30 then a 90 degree turn though. Can't figure out why I couldn't get that on the sis site though. I even had to sit here and download that applet, maybe I need a faster internet connection. Thanks again Dan

BigYellowIron
Member
Member # 12093
Reged: 03/18/01
Posts: 69
Loc: Kearney, MO
Re: Cat 3304 torque specs new
#1050169 - 02/03/03 11:04 PM

That is the way that cat does alot of their torque specs.

The do that because you can usually get an accurate torque at 30ft lbs because there is not much friction yet.

If you would just go for a straight 400 ft lbs then friction may make it inaccurate. You can also torque 30 then use your
3/4 inpack and do the turn. Alot easer in my opinon

Make sure you use some grease or engine oil on the bearings and on the bolts

Adam

trucktech
Member
Member # 23632
Reged: 08/11/02
Posts: 665
Loc: Mulhurst Bay Alberta
Re: Cat 3304 torque specs new
#1050420 - 02/04/03 01:15 AM

Harley does some of theirs the same way, except a lot less torque. Of course thats only on the heads and barrels. You would think that Cat would do the same on the heads then. The only Cats I have done before this have been the little 3404s which are actually Herc motors and quite a few of the Continentals in the older forklifts. The newer Cat forklifts are made by Mitsubishi with the Mits motors.
When I assemble motors, I use lithium grease as an assembly lube and 10w to lube the threads after I use a thread chaser to clean the threads.
Thanks again for the help Dan

Kenworth
Member
Member # 1796
Reged: 01/07/01
Posts: 5372
Loc: British Columbia Southern Corner of the Westcoast
Re: Cat 3304 torque specs new
#1051011 - 02/04/03 01:13 PM

Oh I hate working on the Cats with the Mitsubushi engine I did the maintanance on one at the building supply here the black carbon these engine blow out gets on everything. The once clean coveralls are black in no time and you don't touch anything else the black stuff doesn't come off.

The fun trick was to get some unsuspecting person to walk behind the forklift and give them a smokescreen if the machine idled for 5/10 mins for warm up and you hammer on the throttle it would blow clouds of black. I don't know how many times I got the rental shop manager or some of the inside staff of the store coming out for their smoke break. The same company has a 110 Hyster with Perkins power it smokes blue pretty good did the service on that machine as well atleast the Perkins smoke was a sweet smell the Cat was eye burning acrid.

KW



Pat Dolan
Member
Member # 16018
Reged: 08/28/01
Posts: 3284
Loc: Saskatoon, SK
Re: Cat 3304 torque specs new
#1052767 - 02/05/03 10:25 AM

I have some 6D14 Mitsus and they too are bad for puking out the soot. Not only that, but they are very smelly and smokey when warming up.

VW/Audi has used the pre-torque and then turn so many degrees for cyl. head bolts for quite a while. All of the comments from Big Yellow apply.

Pat

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