snoopy72
Ramona CA.
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Does anybody know how to find top dead center of no.1 piston on a actepillar 3126 ?
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loedman1
Napa, Ca.
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Joined: 06/12/2006
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snoopy72 wrote:Does anybody know how to find top dead center of no.1 piston on a actepillar 3126 ?
Forgive me for being blunt but if you need to ask you probably should take your RV to a qualified mechanic rather than trying to do it yourself. A mistake could be very costly
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ScottG
Bothell Wa.
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Joined: 02/25/2005
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loedman1 wrote:snoopy72 wrote:Does anybody know how to find top dead center of no.1 piston on a actepillar 3126 ?
Forgive me for being blunt but if you need to ask you probably should take your RV to a qualified mechanic rather than trying to do it yourself. A mistake could be very costly
Thats not really fair. I've adjusted the valves in lots of different engines and I know that many diesels have an engine specific method for finding TDC. I would have to look up these engine specifics as well but I could easily do the job. Theres nothing inheritantly ignorant about his question and adjusting valves is easy to those who know how.
BTW, I've R&R'd a 3126 but havent adjusted its valves either so I cant answere your question.
Scott, Grace and Wesly
2003 Dodge 3500 4x4 Cummins (lightly bombed),
2004 Forest River 25RKS many, many mods.
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loedman1
Napa, Ca.
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ScottG wrote:loedman1 wrote:snoopy72 wrote:Does anybody know how to find top dead center of no.1 piston on a actepillar 3126 ?
Forgive me for being blunt but if you need to ask you probably should take your RV to a qualified mechanic rather than trying to do it yourself. A mistake could be very costly
Thats not really fair. I've adjusted the valves in lots of different engines and I know that many diesels have an engine specific method for finding TDC. I would have to look up these engine specifics as well but I could easily do the job. Theres nothing inheritantly ignorant about his question and adjusting valves is easy to those who know how.
BTW, I've R&R'd a 3126 but havent adjusted its valves either so I cant answere your question.
I was certainly not trying to insinuate ignorance only that this is a job best done with some knowledge. Service manuals are available that will spell out the proper way to do the job but the question suggests that the op does not have a manual and therefor should not attempt to adjust the valves. This is not a lawnmower engine, it is a very expensive and rather complex engine that requires precise settings and adjustments in order to operate properly and live a long happy life.
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gunny357
North Carolina
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loedman1 wrote:ScottG wrote:loedman1 wrote:snoopy72 wrote:Does anybody know how to find top dead center of no.1 piston on a actepillar 3126 ?
Forgive me for being blunt but if you need to ask you probably should take your RV to a qualified mechanic rather than trying to do it yourself. A mistake could be very costly
Thats not really fair. I've adjusted the valves in lots of different engines and I know that many diesels have an engine specific method for finding TDC. I would have to look up these engine specifics as well but I could easily do the job. Theres nothing inheritantly ignorant about his question and adjusting valves is easy to those who know how.
BTW, I've R&R'd a 3126 but havent adjusted its valves either so I cant answere your question.
I was certainly not trying to insinuate ignorance only that this is a job best done with some knowledge. Service manuals are available that will spell out the proper way to do the job but the question suggests that the op does not have a manual and therefor should not attempt to adjust the valves. This is not a lawnmower engine, it is a very expensive and rather complex engine that requires precise settings and adjustments in order to operate properly and live a long happy life.
Rich:
I agree.
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keithby
AZ
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Joined: 05/16/2008
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The major problem I'm having is locating a timing bolt the valve adjustment is a piece of cake there is a plug in a threaded hole between the pan in the flywheel cover just below a plastic pipe plug that hole lines up with a hole in the flywheel. There is a bolt made by cat, we made one but I don't trust it the cat one is treaded for the flywheel cover but just plain on the flywheel side just fitting in the hole in the flywheel thus making sure your at top dead center on three of cylinders
snoopy if your still around after those fine commits you received you can e-mail keith@byearly.com
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wolfe10
Texas
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Let me ask a theoretical question.
Assuming the valves loosen with wear (or you loosen them before adjusting), as long as you check and adjust them, say a minimum of 3 times (rotating the engine each time), ALWAYS tightening ONLY (to insure they are not "on the cam", do you really need to find TDC?
What you are doing is tightening them to "off the lobe" tolerance of the correct clearance.
* This post was
edited 05/16/08 08:21pm by wolfe10 *
Brett Wolfe
1993 Foretravel 36' U-240
Cat 3116, Allison 3060
Caterpillar RV Engine Owner's Club: www.catrvclub.org
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ryoung
Indiana
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loedman1 wrote:Forgive me for being blunt but if you need to ask you probably should take your RV to a qualified mechanic rather than trying to do it yourself. A mistake could be very costly
You say you're not implying ignorance? WOW!
Nowhere did he say he wants to adjust the valves, just check the clearance. Totally two different things.
The OP asked a simple one line question. Why can't people who don't know the answer or cannot supply a source to an answer, just keep their fingers off the keyboard.
ryoung
2004 Dodge 3500 Dually HO 6 sp 4.10, Jordan Controller
2005 SunnyBrook 31BWKS
2004 Lance Lite 915
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gunny357
North Carolina
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deleted
* This post was
edited 05/16/08 08:35pm by gunny357 *
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gunny357
North Carolina
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wolfe10 wrote:Let me ask a theoretical question.
Assuming the valves loosen with wear (or you loosen them before adjusting), as long as you check and adjust them, say a minimum of 3 times (rotating the engine each time), ALWAYS tightening ONLY (to insure they are not "on the cam", do you really need to find TDC?
What you are doing is tightening them to "off the lobe" tolerance of the correct clearance.
Brent:
Valve adjustment or checking of clearance can easily be done without finding TDC on #1.
Valves may loosen from useage, wear of the components being the factor here. They can also tighten if the valve seat recedes in the head, a much more serious condition resulting in a burnt valve.
Good idea to check periodically.
There are also some timing marks on the harmonic balancer that can be used for the purpose of checking/adjusting valve clearance.
The CAT service manual devotes 3 pages with pictures to this procedure (valve adjustment) and is a little too technical to fully explain here.
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