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  1. 74M35A2

    M939 "Off-Road" Exhaust Pipe

    Went tooling off road with WildChild467, snagged some overhead branches, and ripped the exhaust pipe off the muffler, since it is the tallest thing with the cargo cover off. Wild knocked the inlet mushroom of his M35 and ran that over also (now hanging on garage wall of carnage). He suggested...
  2. 74M35A2

    upstate ny /pa area 8.3 pump help ?

    http://lmgtfy.com/?q=Cummins+8.3+injection+timing
  3. 74M35A2

    upstate ny /pa area 8.3 pump help ?

    To set injection timing, you need the dial indicator kit and extension to do so. Set cyl #1 to TDC on compression, push the pin in on the back of the timing gear cover, remove the delivery valve for #1 on the IP, install the dial indicator, and compare plunger height vs timing chart. Adjust as...
  4. 74M35A2

    Fuel pressure sensor install

    One could monitor spin on fuel filter blockage that way, and maybe the volume of the filter could act to dampen some pulsation, but it is hard metal piping from the filter to the injection pump, so more difficult of an install. But, aftermarket does make a banjo fitting for the injection pump...
  5. 74M35A2

    Fuel pressure sensor install

    The Bosch injection pump has a pressure relief valve on the return outlet side of the pump, built within the banjo fitting that the return line is connected to (front of pump). I believe that is rated to open around 25psi, therefore keeping about 25psi on the system delivery pressure between...
  6. 74M35A2

    What have you done to your 5 ton this week?

    Mostly as received. Only thing I did was rubbed the lenses with 3M lens polish, but a few are still hazy. Night shot, cold start, idle:
  7. 74M35A2

    M925A2 Delco Style Alternator

    A genuine Delco unit has "Delco Remy" cast into the rear housing, but they are not available new for $100 like the clones are. Have them exchange it for another, and put emphasis that is overcharging at 35V so they don't just test that it makes power and deny your claim. Your next one should...
  8. 74M35A2

    M925A2 Delco Style Alternator

    Yep. That is a Chinese Delco clone (does not say Delco Remy anywhere on it). The regulator is bad on the unit you got. The China production plant probably just tests if the unit makes power or not, and it goes out the door. Spider doesn't test them prior to shipment. You could have a local...
  9. 74M35A2

    M925A2 Mechanical Engine Oil Pressure Gauge, Swapped In

    Update to report that the "window" type lighting seems to be about the same intensity as the full clear case type, I was surprised. It illuminates same as the rest of the gauges, I'm excited. The resolution is so good that the needle dips 5psi at each and every trans shift point when...
  10. 74M35A2

    M925A2 Mechanical Engine Oil Pressure Gauge, Swapped In

    Well put on WYSIWYG. Are you using a mil spec mechanical temp gauge? If so, what was it's original application, and how is the night lighting setup on it? Pic would be fabulous, thanks. I'd like to swap those next.
  11. 74M35A2

    M925A2 Delco Style Alternator

    The bracket should look original, as it is a Cummins OE part. Did you have to change bolts or belt or did they both carry directly over? I have mine, but have not installed it yet, hence the questions. Flunky grounds will not create an electrical load. They mostly just contribute to...
  12. 74M35A2

    What have you done to your 5 ton this week?

    Swapped out the electric engine oil pressure gauge for a mil spec mechanical one. VAST improvement in resolution and accuracy. Bought gauge on eBay, but was $70. Thread in 5T Mod section:
  13. 74M35A2

    M925A2 Mechanical Engine Oil Pressure Gauge, Swapped In

    Having had enough of the low resolution and inaccurate electric engine oil pressure gauge, I purchased and swapped in a mechanical engine oil pressure gauge. This is a military part, spec'd for Willy's Jeeps and such, but this one has the windows in the case for lighting (M35A2 style?). Bought...
  14. 74M35A2

    M925A2 Delco Style Alternator

    The voltage regulator inside the alternator is "stuck" on full effort. Either the voltage regulator is bad, or if the alternator has a remote voltage sensing lead, this lead is not reporting battery voltage correctly and the alternator is trying to boost system voltage until target charging...
  15. 74M35A2

    M923A2 jump started, engine ran. Engine would not re-start, without another jump

    Not a lot of info provided. Upon restart, does the cranking speed seem sufficient enough to start, yet it is not? If so, then the fuel stop solenoid is likely de-energizing due to low voltage which is a known issues with these. Have a buddy hold it in or zip-tie it into the fully retracted...
  16. 74M35A2

    M925A2 Fuel Sender Calibration, Adjustable Bracket

    You're zeroing in on my exact concern. Sender and gauge both "work". With the combination of the angle fill neck not allowing a full fill (forced expansion room), and the sender not yet being calibrated (height via sliding sender bracket), my full fuel is at 3/4 tank, and the truck has run out...
  17. 74M35A2

    Cummins 6CTA8.3 Injection Timing

    How do you know your replacement engine is at 14 degrees? Did you measure this, the engine data plate says so, or somebody just says that is what it is at for the engine you acquired?
  18. 74M35A2

    M925A2 Fuel Sender Calibration, Adjustable Bracket

    Replaced fuel level sender. New sender has plastic float, and is height adjustable via sliding bracketry and screws. It is working but not exactly accurate (ran out of fuel before reaching "E"). I once saw the adjustment procedure for this, and have not seen it since. If I remember...
  19. 74M35A2

    Radio Equipment in M925

    I'd put a label that said "EJECTION SEAT" over the red switch cover.
  20. 74M35A2

    Why are military generators so big?

    No. I have a 4 pole gen head on a diesel construction site light tower that I use as my home standby genset, it is an 1800rpm Kubota D1105. It is no larger than the gen head as found on your typical 10hp gasoline portable 5000W 3600rpm genset. I have seen the generator (alternator) head of a...
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