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  1. R

    Lmtv cab lift safety question

    You don't really need a tach. As general stated, the trans will protect and automatically upshift if RPM gets too high. You select a lower max gear with the down arrow but the trans will not shift unless RPM has dropped enough to allow the downshift. You use brakes to get the RPM back down to...
  2. R

    Lmtv cab lift safety question

    well since operating the original cab hydraulic controls and hand pump deposits fluid on top of the fuel tank i would say they simply disconnected it and plumbed the electric into the cab lift latch and cylinder directly(hydraulic pressure releases the cab latch)? With the right type of...
  3. R

    Lmtv cab lift safety question

    OK so are you still using the cab control valve manifold seen in your pics to control raise and lower function of the cab lift, and the electric pump simply provides the hydraulic pressure like the AOP used to? I might put a cargo box on the roof, I am certain I would not double stack them...
  4. R

    Lmtv cab lift safety question

    Well how much weight do you have on the roof? There is also a concern of that weight deforming the cab and popping out the windshield. For the gun mount installation they added A 1X2” steel support brace from the front of the dash up to the ceiling right in the middle of the windshield. If...
  5. R

    P6 thrust bearing dodged a bullet…

    Ronmar brand:)
  6. R

    Lmtv cab lift safety question

    Ok that has hack job written all over it… I have questions: 1. Does it still have the military hydraulic cylinder and rod end in it? The rod end is important(i explain it in one of my videos). 2. Does it have the folding bars attached between the frame and cab where the top of the...
  7. R

    LMTV M1078 Tachometer

    Is your flywheel sensor outputting properly? Scroll up to post #91 and I describe how to check it with a voltmenter… they do fail, mine was dead. A new one is not very expensive. Part number in the parts list pinned at the top of this lmtv forum. I think a replacement was ~$20 from Napa…
  8. R

    Lmtv cab lift safety question

    The only safety in this system are the flow sensitive check valves at the outlet of the cylinder. If a hose or valve should fail, the increased flow out of the cylinder would cause it to block flow and lock the cylinder. in operation when parked on level ground, the cab should raise past the...
  9. R

    P6 thrust bearing dodged a bullet…

    Ok, new bushing is into the assembly. One of the short case bolts ripped out its threads as I removed it, so I am going to tap and install a 12mm bolt then I can re-assemble the P6… While I was looking thru as much of the assembly as I could access trying to fully understand it, I came to...
  10. R

    CRANK-NO START ‘00 M1079a1

    Well no ICP, no squirt… does the engine have engine oil pressure when cranked? Is the oil feed to the HEUI pump clear and feeding oil when the engine is cranked? The PCV coil may ohm Ok, but is the valve actually sealing to allow pressure to build? have you removed that and inspected its...
  11. R

    Has anyone done the hydraulic heavy duty cab lift upgrade?

    Yep. It us not horribly difficult to replicate but you have to be sure of how you are doing it as there is not much room for error. A proven method would be safer for most all concerned…
  12. R

    Has anyone done the hydraulic heavy duty cab lift upgrade?

    The thing about the cab cylinder relationship with the cab fully raised is that the cab is basically hanging on the fully extended cylinder as the cab should be forward past the balance point. to do this safety without any unpleasant surprises you need to raise the cab right to, or even...
  13. R

    Has anyone done the hydraulic heavy duty cab lift upgrade?

    So looks like they tried to tie the longitudinal frame to lateral frames and get it to distribute forces a little better... Sadly no way to really reach the inside of those frames to put in proper hardware on the back side... Probably could weld them in:)
  14. R

    What is the single most concerning dash gauge reading?

    Well 14 and 28 is a good sign out of the alt... what do you see at the power panel test points on the left side when you open the dash power panel?) check with on and running... a bad high resistance connection resists current flow(like a kink in a garden hose) so with no current flow you...
  15. R

    Fuel Line Fitting Size

    the fuel system hose fittings are JIC-6...
  16. R

    P6 thrust bearing dodged a bullet…

    in this case i think so, as long as the "plastic" is up to the chemical and thermal tasks, like I suspect the Allison component is...
  17. R

    P6 thrust bearing dodged a bullet…

    If it were a constantly loaded application I would not do it this way, but with the abundance of lubrication flow and only casual contact that i can see, I think it will work well... the way the oil flows it may actually work to hydraulically push the carrier away from the bushing whenever they...
  18. R

    P6 thrust bearing dodged a bullet…

    Yep, Aluminum… Whats it going to do, void the warranty:) the Allison part looks like a fiber re-enforced thermoplastic, probably popped out of a injection mold machine run by Chinese slave labor for .50 each… There is nothing I can find in this design that forces the clutch carrier back...
  19. R

    P6 thrust bearing dodged a bullet…

    Yes it costs that much… it took me a half hour to cut a blank out of aluminum plate with a pair of hole saws and about a half hour to turn it into a bushing on the lathe…
  20. R

    P6 thrust bearing dodged a bullet…

    Yep, I also think roller bearings probably don’t like being repeatedly accelerated by random contact and then released… this doesn’t bother plain bearings either:)
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