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

[pwknapp]

Anyone around between Jackson Hole and Missoula who can do it over the Holidays??

 

[illflem]

pw, give these two a call



Brian Ward Evanston, WY (307) 789-3583



Bruce's General Repair, Inc. (does mobile repair)

Jackson, WY

(307) 739-9490 Cell (307) 730-8562

 

[M Barnett]

I have the tools for setting the timing, but I have hesitated cause I'm wondering if there is enough room to clean the shaft and gear without removing the gear from the case. anybody know? Another thing I will do is put a small amount of rottenstone between the shaft and gear.

Michael

 

[Deezul1]

When I had mine done by Piers + Co they used a spray cleaner like brake clean to clean it and used it very liberally. It seems to me That Joe D mentioned that some of those cleaners were not as good as others due to residue left behind that could cause trouble. I think he recomended the cleaner that DC uses but its been awhile. Does anybody remember the recomended cleaner?

 

[Joe G.]

I cleaned mine while the gear was loose with plenty of brake cleaner and air. I moved the gear as much as I possibly could while I was doing that. Not much movement but there is a little.



Machinist experts on here STRONGLY advise against putting ANYTHING on the shaft. The best defense against slippage is clean dry parts and proper torque. I torqued mine about five lbs more than the specs. You have to be careful, because too much more than the specs might twist something very expensive off. My service manual is not handy so I don't want to guess what the correct torque is according to the book.

 

[pwknapp]

'preciate it Illflem.

 

[JJW_ND]

Slipping experience!

Just a little feedback on what a good timing slip does.



Recently had my headgasket replace to fix a longterm seep by the Tstat. Ended up replaceing the side cover gasket while everything was off. Had to pull Injection pump to do side cover. Went for fist test drive after everything is done. Truck runs great like before. Just leave shop, taking it really easy to watch everything after all the work. Was in 4th hardly over 2K rpms very low boost and truck dies along with a MASSIVE cloud of white smoke. OMG! Pull back into the shop. Check timing, Yup, slipped! Reset, also torqued to about 150 (first time 145). Went for a drive, this time we made it about 1 mile and Massive white cloud. "You have got to be kidding!" This time brake clean everything lots of air and increase torque to 160 lbs. Held on test drive, held on several hard dyno runs. Now that its holding lets rest the timing!!! Had to smack the gear a little to get it off ... this time it was going to hold!. Reset timing, and did the same brake clean, lots of air and 160 ft lbs. A few more dyno runs and and few thousand miles later and its holding fine.



Maybe timing can slip a degree or two but in my case it slipped enough that the truck did not run and the white smoke was impressive!



I think the revised torque spec is 160 is up from 140 ???



jjw

ND

 

[JGK]

For what it's worth, both times I had the pump bench tested at a certified Bosch injection shop, they put 3 or 4 tiny little marks of chalk on the shaft before re-installing the pump. Presumably to keep the gear (thus timing) from slipping.



So, some do, some don't.



-Jay

 

[Andy Redmond]

Use the High dollar QD Contact Cleaner and compressed air. It drys more fully and quickly than Brake Kleen Etc.



Don't get too crazy with the torque. The pump shaft can get damaged. The early DC manuals (P7100) called for around 125 lbft the Cummins manuals @ 144 lb ft.



Good luck

Andy