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  1. grunex125

    Top Stop vs Non Top stop...

    yeah I didn't expect to have to tear mine apart either, but ......well anything man made is gonna break down I guess. recently at the local fire department auction I saw an 800 series truck that had been repowered with a Mack engine..... looked like it fit in there alright, but air cleaner and...
  2. grunex125

    Top Stop vs Non Top stop...

    The timing marks are on the accessory drive, you should see four marks there, many times the marks are covered over with heavy olive drab paint so you may need to take some steel wool or some chemical paint remover to remove the heavy paint, please don't use a electric grinder with a wire brush...
  3. grunex125

    Top Stop vs Non Top stop...

    it's all surprises sometimes isn't it? I think the thing that was hard for me to get used to was when I put the heads back on and timed the injectors. the local diesel guru told me to just remember "too young (1,5 timing mark A) too old (3,6 timing mark B) just right (2,4 timing mark c)" and...
  4. grunex125

    Top Stop vs Non Top stop...

    pressure checking can be done by any machine shop that does work on cylinder heads, I think for me it was about $75 to pressure check them and that was all, the reworking of the coppers had to be taken to a local shop that specializes in Cummins engines. The guy I went to had the special tooling...
  5. grunex125

    legal height of mudflaps in MN

    After a recent conversation in another thread I have been doing a little thinking on this subject and decided to do a little more investigating. I came up with this page from the MN DOT which discusses several issues and hopefully helps someone down the line who is a new owner. The question...
  6. grunex125

    Top Stop vs Non Top stop...

    While the injectors are out you might want to check the copper sealing cups around the injector body. when I put the new injectors in my 250 I had to pressure check the heads and found also that the coppers where bad. about $375 to have them redone per head. If you have any other questions feel...
  7. grunex125

    Top Stop vs Non Top stop...

    any pics? just curious as to how much difference or did you have to send in the old injectors for a core?
  8. grunex125

    Mud flaps on the M939 Tractor

    On the subject of mud flaps guys, anyone know the legal height that that the mudflaps can be off the ground? I've got one that is six inches longer than the other and would like to make them the same length but need to have enough height to make sure they don't rip off when I'm running my dump...
  9. grunex125

    Power steering or lack of

    This past summer I swapped engines in my 800 series truck to the 350 Big cam III Cummins, and topped off all the fluids and fired it up, the engine fired up great and of course died but with a little patience we managed to get it running like a top. after running a while I got in and turned...
  10. grunex125

    Any 915 and 916 pics or videos?

    Hey thanks guys!! your input is greatly appreciated! Any and all comments are welcome, I'm just listening to what you guys have to say about them for now and I'll have questions for you soon.
  11. grunex125

    Any 915 and 916 pics or videos?

    I haven't been up close to many of these trucks yet at all and I'm on a fact finding mission, I appreciate the info for sure. From what I gather these units used an Allison auto trans behind a Detroit 60 would this be something that could easily be swapped out for say a 13 speed fuller? what...
  12. grunex125

    Any 915 and 916 pics or videos?

    Outside of the usual dealer furnished videos online, does anyone have any pics of their 915's and 916's I'm interested in possibly buying one for a grain hauler, mostly looking for applications where they are used and how they've been put to work. I'm leaving this thread open for all...
  13. grunex125

    What have you done to your 5 ton this week?

    since I haul silage with my truck and overheating is a problem due to the silage getting into the radiator and on the top of the engine, I decided to install an Aux. air line to blow out the radiator on not only the truck but also the self propelled forage harvester. The tanks don't have enough...
  14. grunex125

    5Ton Dump Question

    Thinking any way ya look at it these tires on these trucks are $300+ no matter what size one finds. Thats kind of one of the deciding factors when I bought my truck. $3000 in tires alone maybe more.
  15. grunex125

    5Ton Dump Question

    I think there is a certain amt of "grandfathered in" that goes along with these trucks.
  16. grunex125

    5Ton Dump Question

    I know what you mean by paying tribute!
  17. grunex125

    5Ton Dump Question

    Looks like you had to drop the bumper height as well too to get it to pass inspection. Not a bad way to go, sure makes it easier to climb up on top to access the hood and engine compartment. purists may hate the idea, but if it means we don't go skipping up over the top of some little...
  18. grunex125

    Allison M916 + Mk48 Cab = 6x6 "FEMTT"

    Soni, your project looks great! some time I'd like to see this one up close. I can see some real innovaton here and the possibility of other applications in addition to the ones you mentioned. Logging industry comes to mind as a forwarder, Ag comes to mind in several applications simply by...
  19. grunex125

    Replacing the NHC250 with the 6CTA8.3

    over all size you will be ok with that engine, it will fit under the hood if that is what you are asking, things to keep in mind are trans input shaft size, bell housing number and engine mount locations. watch your alignment and fit with the trans. you may be swapping out trans too, which also...
  20. grunex125

    Replacing the NHC250 with the 6CTA8.3

    what model truck are you working with? 900 series or 800. I can help with info on an 800 series truck and a 400 BC series engine. anything newer than that I couldn't say for sure on measurement and etc. Pm me if you like. Doug
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