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D6 5R timing/valve setting procedure

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10 months 1 week ago #251218 by unstyled
Pecking away at the multiple issues with my first dozer, a D65R. In the process of setting the valves, injector pumps, etc. Attached is a pic of what I think is one of two marks on the flywheel for timing. The pic shown has TC 2&5  looks like. I originally turned the flywheel/engine (counter clockwise setting on the seat) to the TC 1&6 (got it perfectly aligned) and checked #1 cylinder tappet clearance. One was ever so slightly loose but not even the recommended .010 hot with the other tight and no measurable clearance. I turned it around one more complete revolution (again, the pointer was perfectly timed to the flywheel mark of TC 1&6 (pic of TC 2&5 is off somewhat for reference only). This time one tappet was about a quarter inch lower than the other so I assume this was not the compression stroke or TDC of #1 cylinder. My thoughts are it takes two complete revolutions of the flywheel to complete the intake/compression/power/exhaust cycle. 

I either don't have #1 cylinder on the TDC compression stroke for whatever reason or the valve setting is way off. Can someone explain exactly how to set the valves (also setting injector pumps when doing each valve). This is time consuming but in my opinion not difficult to do - if you know the correct procedure! Am I totally incorrect or what? Thanks!


 
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10 months 1 week ago #251224 by PhilC
Hello unstyled
You are on the right track. Starting from TDC the piston moves down for the Intake then up for compression then down for power then up for exhaust. If there is no valve clearance when you have it on TDC after the compression stroke then you may have found why the engine was running rough. The second time you had number one on TDC it was either on exhaust or intake stroke depending on which way you turned the engine. I assume you have identified which is the intake valve and which is exhaust.
There should be a third mark on the flywheel for cylinders 3 and 4

944A - Machine SN 43A2589 Engine SN 90A284
955K- Machine SN 71J3772 Engine SN 83Z0704
D6 SN's 4R732sp, 5R2724, 5R4832
D8 SN's 15A1254, 15A2287, 15A2723

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10 months 1 week ago #251237 by unstyled
Ah ha! The only thing in question was the third timing mark (TC 3&4) didn't know it was there on the flywheel, thanks PhilC. So....... after turning the flywheel to the TC 1&6 mark on #1 compression, I'll set the valves, turn till TC 2&5 show, set the valves and turn to TC 3&4, setting the valves. I planned on setting the fuel injection pumps at the same time I set the valves. I assume setting them in the same order as the valve numbers is correct? Thanks for the reply PhilC, I appreciate it.

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10 months 1 week ago #251238 by ChuckC
Make sure the decompression lever is in the run position.

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10 months 1 week ago #251239 by unstyled
Good to know ChuckC, thanks.

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10 months 1 week ago - 10 months 1 week ago #251246 by PhilC
Its not quite that simple but close.Firing order is 1-5-3-6-2-4 so you turn the crank until number one is on TDC compression stroke set both valves on number one. Turn the crank until #5 is on TDC set both valves on #5 and then turn it until #3 is on TDC etc until all six are set. You cannon adjust two cylinders at once as even though two cylinders will be at TDC only one will be on compression stroke.

ChuckC makes a very good point but it should move the valve more than what you described and it should only affect the inlet valve.

944A - Machine SN 43A2589 Engine SN 90A284
955K- Machine SN 71J3772 Engine SN 83Z0704
D6 SN's 4R732sp, 5R2724, 5R4832
D8 SN's 15A1254, 15A2287, 15A2723
Last edit: 10 months 1 week ago by PhilC.

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10 months 1 week ago #251248 by unstyled
I thought you would need to turn the flywheel around to the specific firing order on each mark. Thanks.

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10 months 1 week ago #251250 by D8Dude
Hi all,
I could be corrected, but I thought that the compression release acted only on the intake valves and not the exhaust valves.

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10 months 1 week ago #251270 by PhilC

Hi all,
I could be corrected, but I thought that the compression release acted only on the intake valves and not the exhaust valves.
 

You are correct and I have edited my post to avoid confusion.

944A - Machine SN 43A2589 Engine SN 90A284
955K- Machine SN 71J3772 Engine SN 83Z0704
D6 SN's 4R732sp, 5R2724, 5R4832
D8 SN's 15A1254, 15A2287, 15A2723

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