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  1. R

    LMTV FMTV Exhaust Brake Questions?

    Here is the Pacbrake diagram for the WTEC3, basically the same as the WTEC2… https://support.pacbrake.com/wp-content/uploads/L5206.pdf
  2. R

    LMTV FMTV Exhaust Brake Questions?

    Basically accessing the vehicle interconnect wiring similar to what is seen in this WTEC2 diagram. Pacbrake would have the exact wiring config. I saw it not long ago, let me see if i can find a link. This diagram shows using a VIM relay, and you don't have a VIM, so you will need to add a relay…
  3. R

    Webasto Heater?

    Oh yea, that's a lot of heat. So where do the hoses attach to the engine plumbing? If I were hooking it up, I would want it to inject heat at the transmission cooler-radiator junction, and return coolant from the thermostat housing. this way heated coolant would flow thru the trans cooler...
  4. R

    Webasto Heater?

    In order to get cab heat it would need to flow thru the cab heater, and I suspect the plumbing does not encourage this as the goal is to get the engine warm. Where exactly are its two hoses connected to the cooling system? A 1500W block heater delivers ~5100 BTU/HR into the coolant, so a...
  5. R

    Webasto Heater?

    Yep, thats a DC powered, diesel fired water heater/arctic kit…
  6. R

    M1078A1 cab and chassis electrical upgrades including AC

    Yea the pics I have seen and the few I have had my hands on have JIC6 fittings on the primary filter and on the outlet port on the pressure reg at the back of the cylinder head. Don’t recall if I have ever had my hands on the lift pump inlet port and don’t recall seeing a pic of it, but I...
  7. R

    M1078A1 cab and chassis electrical upgrades including AC

    The 3116 lift pump is in the governor like the HEUI. from what I have observed I think they use the same basic lift fuel lines. One ~6' from tank to primer/primary water separator and filter. A second ~2' line from primary filter to governor/HEUI lift pump inlet port, all JIC6 female fittings...
  8. R

    M1078A1 cab and chassis electrical upgrades including AC

    What does the primer feel like? Try it before you start next time. It should be firm in a press or two…
  9. R

    M1078 Allison transmission parts manual?

    There are transmission exploded views like this in the 24P manual found with the other M1078/LMTV manuals in the manuals section on the first page of this forum.
  10. R

    Transmission control panel is blank...can't crank anymore

    Thats weird, the VIM is perhaps the most waterproof box on the A0... I have one, as i deleted mine, all you will need are some relays for it... message me.
  11. R

    Learn from Chucky..., FMTV cab support tool

    The top cannot move. The back wall of the cab comes down past the floor of the engine tunnel forming an inverted V when the cab is raised, to push any brace up into… onced pushed up into the V It locks quite well, had this one a little tight, was a little work to get it back out…
  12. R

    Learn from Chucky..., FMTV cab support tool

    Bracing the cab is not really rocket surgury. If it will still raise pump it over the balance point and put a stick in there. On level ground with the cylinder fully extended you can disconnect any hydraulic line you wish as the cab is hanging mechanically on the fully extended cab lift...
  13. R

    M1078 Transmission issue/question

    Well they started incorporating the wtec3 mid 98. Is the display on the control pad wide/rectangular with blue-green color display, or is it narrow/square with red characters? Wide green display = 2, narrow/square display = 3… This is a C3 pressure sw fault. i see the note about possible...
  14. R

    Transmission control panel is blank...can't crank anymore

    1. You must have 12 and 24 at the test points when everything is turned on. 2. You must have a transmission display To provide the neutral start contacts. CB 79 and CB22 provide 24 and12v power to the transmission. There are also two additional red 10A fuses in the VIM mounted under the...
  15. R

    Learn from Chucky..., FMTV cab support tool

    The few times I have had that strap fully extended, there was no action required to lower the cab, it simply folded as i started pumping the cab back over the balance point(no restraint whatsoever)… there is nothing in the op manual about any form of locking mechanism on these trucks, just the...
  16. R

    Learn from Chucky..., FMTV cab support tool

    Thats not an up lock, the only “lock“on this cabs motion is hydraulic, that and the raised position is typically past the balance point… That is a folding “keep the cab from toppling off the front of the truck if the cylinder or mount fail, strap” they do not normally fully extend as seen in...
  17. R

    Learn from Chucky..., FMTV cab support tool

    Unless of course it is the cylinder and rod end where you must be working. Raise the cab just short of the balance point, take a measurement from the top rear engine lift bracket to the top rear of the engine tunnel on the cab. Since the rear of the cab comes down past the top of the tunnel...
  18. R

    Wiring Schematics for M1078 (1997 with new C7)?

    Yea thats a pretty common DC circuit breaker config.
  19. R

    ECO Hubs Who needs 3:07 gears?

    Wait. what! Not a cruise control?
  20. R

    ECO Hubs Who needs 3:07 gears?

    Did you leave him a comment?
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