Recent content by Ray70

Well Houston, we have a problem! I have cam/ gear assemblies for both an 802A and an 803A but neither have that slot in the cam face. They are both solid on the end. I assume this must be something related to LPW4 Vs DN4M ?? I don't recall which this cam was from, but assume both are...

Humm, I just thought of something. The slot for the governor is cut into the camshaft, the gear appears pressed on and the alignment dot is stamped into the gear. If I take a picture of my camshaft from the end, you should be able to judge the location of the timing dot relative to the slot...

Jack, you can also look for continuity between all 4 positions on S1. 2,4,6 and 8 should all have continuity to each other. if they don't then your missing some of the jumpers. If that's the case you can just make up some short wires to connect the disconnected terminals together.

Mark, FYI your rational isn't going to tell you what you want to know. The pistons will always be at TDC based on the timing marks because it isn't the crank or the gears that may have slipped. The only thing that would be off would be the position of the valves when the piston is at TDC if the...

8 1/2 " is correct for the 803 and 5.5" is for an 802. Anyone that said to use 5.5" on an 803 to avoid clearance issues neglected to say that the gage will also read completely inaccurately! If you can't find rubber battery flaps in your stash, shoot me over a PM.

Rather than using that terrible plastic battery cover they also came with individual rubber "flaps" that fit over the battery posts. On the fuel gage 90% of the time the issue is a dead spot in the sending unit, typically fixed by replacing the sending unit with a better 8 1/2" WEMA marine...

Not sure if everything comes up when searching the US Ebay site, but in the past I found a lot of OEM engine parts on the UK Ebay site. You can also get some parts direct from Cummins' on-line site. Also if you suspect a problem with the Cam shaft, I have a couple used ones with the gear...

That's the crank key, I'm curious about a possible issue with the camshaft and / or the attachment of the cam gear on the camshaft.

Don't rely just on the alignment dots. I'm talking about making sure the cam gear is attached to the camshaft correctly. I think the end of the cam has a slot cut in it and the gear has a horizontal bar sticking out that locks into the slot in the cam. Make sure the end of the cam didn't split...

Did you check the camshaft to see if the cam and gear are intact and aligned?

That's a sure sign that the valve timing is incorrect. It sounds like you should just go ahead and pull the timing cover off and take a look.. See if there are signs of someone else being in there previously. Perhaps someone assembled things incorrectly ( timing gears improperly aligned ) or...

Feel free to go ahead and ignore everything I said! I think I replied before drinking my first coffee and didn't look close enough at the gage. I thought I remembered straight up being Zero and simply saw the gage left of 12:00 and assumed it was on the discharge side..... Not at all, your gage...

At some point you should check the battery charging alternator. In one of the pictures the ammeter seems to be sitting in the negative. That is fairly odd, typically it will be up in the positive range immediately after starting and slowly settle back to zero to ~+2 while running. It's also...

How are you measuring the backpressure? Are you using a manometer, of judging it simply by feel? The 803 and by far worse, the 802 can be deceiving if you just go by feel with the oil fill cap off because of the crank and pistons pulsing up and down. To test compression I made a steel tube the...

Anything is possible. I believe the LPW4 gear is held to the gear with a slot in the cam and tang on the gear. Perhaps the ears of the slot in the cam have broken off. Only way to know if to pull it off. You could try pulling the #1 injector and valve cover and stick a screwdriver of rod down...