Engine/Transmission (1994 - 1998) How do these trucks slip time?

[ebrooker]

My truck is a 1995 and some of you have replied to some of my questions saying that it sounds like it has slipped time. I have taken it to two diesel mechanics and they don't think its possible for these trucks to change timing. They also seem reluctant to check the timing. Could someone enlighten me so I can talk intelligently about how this is possible.



Thanks

Eric

 

[DSiemens]

The injection pump drive gear is a friction fit on the injection pump shaft. There is a nut on the end of the pump shaft, but the pump shaft can rotate (slip) while the gear doesn,t.

 

[Joe G.]

The pump shaft is tapered. If it is not really clean and torqued correctly when assembled it can slip.

 

[Deezul1]

If they dont how it can slip timing they prolly arnt the guys to set it.

 

[shendren]

Joe G. is spot on. the guys at cummins said when the pump is taken out of the plastic bag, it has grease on the shaft and when they put the gear on it is "slipped" then. cummins would not add a manufacturing step to remove the grease. too much mulah. most of the 12v trucks come off the line with the timing incorrect.

 

[illflem]

Some have said that even a chalk mark on the pump gear shaft is enough to allow it to slip. Your timing can also change due to a KDP that has come out without causing damage. The pin assures the proper alignment for the case.

 

[ddutil]

Guys, what's your advice on adjusting timing, asap then every 100k miles, or ? Thanks! Dan

 

[Joe G.]

Get it torqued correctly on a dry clean shaft and forget about it. If it's put on right it won't slip.

 

[Rammin On]

Joe is right ... set the timing correctly and make sure everything is clean ... . and you won't have to worry about it again . .

 

[ddutil]

Thanks for the info! Dan

 

[Reb.B]

i locktight the SOBs on. They can be a pain, any oil, grit of dirt, grease, improper torquing procedure and they will move. On my fullboogy race trucks i'm going to drill a hole inbetween the shaft and gear, then tap it and put a set screw. I may do it in two spots, not sure though, ... it ain't moving then, lol. When increasing the pump pressures it gets harder to keeps them from moving.

 

[Bseg]

How do you set or check the timing? Is it real difficult?



Thank you.

 

[illflem]

Setting the timing isn't too bad but the tools will set you back more than it costs to have it done, not worth it for a one shot deal. Here's instuctions http://dodgeram.info/tsb/1994/18-10-94a.htm

 

[Bseg]

Thanks Bill, after looking that over you are right about the cost of the tools that I don't have. Plus I don't know if I want to mess with that myself. I think I'll wait and get someone to check it and modify if necessary.

 

[illflem]

Bseg, the problem with setting timing is finding someone to set it to 15. 5-16°, the best range for our trucks in normal use. Cummins and the dealer will only set them to factory specs.

 

[ddutil]

Bill, go on, what's the factory specs and why is 15. 5/16 a better timing? I'm eager to learn! Dan

 

[gitchesum]

Trying to find a Cummins shop to set the timing at anything other than stock settings is as close to impossible as you can get.

Piers explains the pros and cons of timing on his website.

http://www.piersdiesel.com/Faq.htm



Depending on what part of the country you live. You might have better luck getting together with another member and having him give you a hand on the timing. A few guys have purchased the tools to do and are more than willing to help a guy out. The best part is it might only cost you a case beer as opposed to 200-300 dollars

 

[ebrooker]

member near frankfort ky.

Is there a member near frankfort ky who might help me get my timing set. Some said that some members have bought the tools. Or even a diesel mechanic in this area that would advance my timing.



Help Please

Eric

 

[KFaulk]

I recommend you call Tom at Black Mountain Diesel. They are in Cythiana. I don't have his number handy right now. If you can't find it, send me a pmail.

ken

 

[illflem]

Black Mountain Diesel 859-234-3111