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  1. Z

    Oh crap! shorted wire...

    The original dash setup grounds the instrument panel via screws/contact to the frame/chassis. I added a panel ground wire so the panel is grounded - mounted or not.
  2. Z

    Oh crap! shorted wire...

    Correction - the voltage pulses from a pulsed regulator aren't super fast and can be viewed with an analog volt meter but not a digital one. Some folks say that a mechanical regulator needs a load on it for the pulses to occur. You measured the voltage on the output wire - right? (Just making...
  3. Z

    Oh crap! shorted wire...

    The regulator does its thing any time is gets power - engine running or not. The vintage car folks say a pulsed regulator is like an on/off switch and produces a square wave. The frequency is too fast to see by eye and volt meters show the time average value. The same folks claim when these...
  4. Z

    Oh crap! shorted wire...

    Had some fun digging around and found a 1976 Steward Warner catalog ( https://www.stewartwarner.com/wp-content/uploads/2022/06/David_Moffett_Stewart-Warner-Corp-Product-Catalog-1976_0001.pdf ). There are fuel, temperature and pressure gauges in the same style and ranges as in my 1967 Spryte...
  5. Z

    Oh crap! shorted wire...

    In Spryte manuals the thing your pen is pointing to is labeled "Voltage Regulator, Dash Unit". Per Redsqwrl, a lot of older gauges used lower voltage, e.g., 1969 Mustang has 5 volt gauges and older GM's used 6 volt, and some were pulsed and others not. Also gauges need the voltage to be constant...
  6. Z

    Oh crap! shorted wire...

    A while back had a starter go out and replaced it. Within a few weeks the new one went bad too. When getting a replacement under warranty, the NAPA guy told me to check the battery voltage with no load and while cranking. With load the voltage was down a couple volts which fired the starter for...
  7. Z

    Oh crap! shorted wire...

    Just a shot in the dark - The short could have dropped the voltage "everywhere", including at the coil, resulting in a weak spark-plug spark. Some engines always send the full voltage to the coil. In others, e.g. Fords of your vintage, a resistor is used to lower the voltage to the coil when...
  8. Z

    OC-4 transmission disabled and wonder why

    Just in case you weren't aware, a 1404 manual can be found at http://www.goldcordmine.com/manuals/ It contains a paragraph on track tension. Likely Nancy provided you more and better information on this topic. The manual part numbers are Thiokol numbers. It would be nice to find a Rosette stone...
  9. Z

    OC-4 transmission disabled and wonder why

    My first snowcat was an Imp. When I got it I was caught up on how to use the 13 forward and 7 backward gear combinations. Then someone provided some good advice. First, to keep the rear transmission healthy, only shift it when the cat is completely stopped. Second, think about what power or...
  10. Z

    OC-4 transmission disabled and wonder why

    Is it in 1st or R? If its "R", maybe the carrier got installed 180 degrees off like BoyToy's did (thread Tranny woes on 1404 Imp) and disabling the OC-4 shifting is how they addressed it. If it really is in 1st gear, I pity the previous owners.
  11. Z

    OC-4 transmission disabled and wonder why

    In an old thread ( https://www.forumsforums.com/threads/thiokol-c4-auto-transmission-to-a-oc-4-manuel-trans.36805/) Snowcat Pat posted pictures (post #31) showing how the gears align in an OC-4. If your looking inside, good to know how things are supposed to look.
  12. Z

    Imps and valve adjustments

    If you are operating at a non-trivial altitude you may need to advance the timing beyond what the factory says it should be at sea level.
  13. Z

    OC4 poor steering performance

    Might the same be said if they are internally too lose? When peeking inside see if the bands fully conform to the drum. Relined brake bands are hard to get tight enough initially. Once used for a while and the band conforms to the drum, they become easier to (internally) tighten. When the...
  14. Z

    C-4 shift linkage adjustment-help!

    I think you are correct about the orientation. Look at the Jan. 20, 2007 thread "Thiokol differentials" at comment #8 by mtncrawler (on Jan. 25, 2007). https://www.forumsforums.com/threads/thiokol-differentials.7760/post-76298 Also look at Snowcat Pat's comment #10. There is lots of good stuff...
  15. Z

    C-4 shift linkage adjustment-help!

    Picture IMG_2362 looks just like it does on my Spryte's C-4. A S70FS manual would help you out, and I sure someone has one.
  16. Z

    Spryte radiator hoses

    The Spryte part manuals show different radiator hoses depending upon the serial number. For serial # 1682 -1706 the figure depicts both radiator hoses as flexible (Thiokol part numbers 01701-17 & 01701-7) while for serial number 1477 and beyond it shows solid hoses (Thiokol part number lower...
  17. Z

    Parking brake cable needed 1202A Spryte

    While I reacheded out to catservice, we has a hard time connecting with the holidays and all. In the end I sent the cable to Speedometer Service and Instrument Company (https://www.speedometerserviceportland.com) and they put in a new core line with new swagged ends in short order and for a very...
  18. Z

    OC-4 Oil Specs

    PM me - I have the version that covers No. 95-462.
  19. Z

    OC-4 Oil Specs

    The 1200 Spryte manuals are broken down by serial number ranges: 95-462, 464-722, 744-968, ..., 1447 and on. Whats your serial number?
  20. Z

    Parking brake cable needed 1202A Spryte

    I know pictures help. Pic 1 - end that goes in the lever, Pic 2 - end that mates with the brake, Pic 3 - overall length. The cable assembly has a metal exterior. Looks a little like a CJ5 jeep cable.
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