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Keith S

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Everything posted by Keith S

  1. Keith S
    OdometerParts.JPG

    From the album: eMack Photos

  2. Keith S
    Speedometer

    From the album: eMack Photos

  3. Keith S
    Indicator panel

    From the album: eMack Photos

  4. Keith S
    S-Cam Support and Spider misalignment
    If you're changing the support brackets I'd cross my fingers. If the chambers fit on the existing support the alignment shouldn't be worse.
  5. Keith S
    Fuse Circuit

    From the album: eMack Photos

    This circuit will be used to show when a fuse is blown or a battery pack contactor (relay) is open. Each of the four packs will have this circuit. There will be a indicator panel in the glove box (located where the circuit breakers used to be located). Because this is 200 volts DC, I'm using small neon lamps. Basically the circuit functions like this (ignore the resistors (R1, R2...) as they simply limit current): Pack voltage (200V) flows from the battery and hits the fuse, if the fuse is good the neon lamp circuit is ignored and voltage flows to the Pack Contactor. If the Pack Contactor is open (turn off), transistor KSP92BU (in the middle) acts as a switch and turns on the neon lamp If the Pack Contactor is closed (turned on), the circuit is ignored and neither neon lamp is on. If the fuse is blown, transistor KSP92BU (on the left) acts as a switch and turns on the neon lamp. The Pack Contactor neon lamp will be off - which is not really correct because that means the contactor is closed which may not be correct. So I may change the circuit and move the R5 connection to the Battery side of the fuse.
  6. Keith S
    Spider and S-Cam Alignment
    Removing the spider was super easy - just loosened the bolts. Checked the S-Cam bore for squareness with the base and it was fine. So, I'm not thrilled with this idea, but I'm seriously considering: Replace the 5/8" bolts with 9/16" gr8 - that gives enough rotational slop to allow the s-cam to nicely align. Drill and ream two 5/8" holes through the spider and backing - top and bottom in picture. Press in two 5/8" stainless steel dowel pins to keep spider from rotating. The dowel pins are to keep the spider from rotating because of the bolt slop. Then tighten the hell out of the gr8 9/16" bolts. What do you guys think?
  7. Keith S
    eMack Photo Album at: http://photos.advanced-ev.com/
    It does looks small. It's a Warp11 (11.75" diameter) DC series motor. With electric motors, torque is the big thing. Motor torque is based on how amps you can push through it. Motor HP is based on how much voltage you push through it. Cruising you need HP; accelerating you need torque. This little motor's torque (at 1,800 amps) is about 550lb-ft from 0-1500 rpm. Those are dyno numbers, but not reality. I'm limiting this motor to 200 volts, and 1000 amps. Unless I floor the accelerator while in 4th or 5th gear, it'll never hit 1000 amps. Max amps will probably spike at 750 amps for a fraction of a second. Range: With stop-and-go driving I should get around 130 miles. Highway cruising range (55-60 mph) will be much less - I'll be surprised and really happy to get 80 miles.
  8. Keith S
    Sign of some problems to come?

    From the album: S-Cam Repair

    Someone had a bad day with this s-cam
  9. Keith S
    S-Cam Support and Spider misalignment

    From the album: S-Cam Repair

    So this is why this S-cam was ground and beat on.
  10. Keith S
    Cast iron (steel?) Spider

    From the album: S-Cam Repair

  11. Keith S
    Spider and S-Cam Alignment

    From the album: S-Cam Repair

    OK. So my questions are: How much slop is there in the spider bolt holes? It looks like if there is enough slop, I could rotate the spider and align (I hope I hope) the s-cam. Everything is machined, so where is the S-Cam's "alignment adjustment"? If I replace the spider, how is the spider aligned with the s-cam support? Anyone have part number for a replacement spider?
  12. Keith S
    Hmm...

    From the album: S-Cam Repair

    Lots of things wrong in the picture
  13. Keith S
    eMack Photo Album at: http://photos.advanced-ev.com/

    From the album: eMack Conversion

    I started putting together an on-line eMack photo album. Nothing technical, just pictures for now. It's located at: http://photos.advanced-ev.com/
  14. Keith S
    How to convert a Model-B Mack truck to all electric power.
  15. Keith S
    That's an interesting part number - it brought up a whole bunch of "equivalents". Specifically the DO-Ray 410's, which led to a whole bunch of truck cab lights. Anybody know about the DO-Ray 410?
  16. Keith S
    My Model-B 46 came with five good KD517 bezels and amber lenses. What I don't have are the bases. Has anyone hacked-to-fit any of the new el-cheapo teardrop plastic cab lights to fit the KD517s? At $23 for five el-cheapos, it doesn't seem like too big a waste of money if it doesn't work. I've wasted more than $23 on a lot of stuff/ideas that didn't work!
  17. Keith S
    Proof of Concept for S-Cam repair
    I used to grind crankshafts and considered having it welded and then ground. If it was someone else's money, I might. But, there are two journals on each S-cam and a lot of heat is generated during welding journals. My biggest concern with welding and then grinding the journals is that I don't know anything about the hardening and heat treating used on the S-cams. There was several ways I could have "repaired" the s-cams. The epoxy approach was Plan A. It was the least destructive to the base material. The epoxy was $45 and claims to be suitable for repairing this type of bearing. If this stuff flakes off I can always get more aggressive/destructive with grinding then sleeve it - still no loss of base "hardening". The last and most aggressive/destructive of the original part is grinding, welding, then grinding again.
  18. Keith S
    Finished size - 1.498

    From the album: S-Cam Repair

    I think the finished size should be 1.500". The bushings are 1.505" bore w/o press-fit into spider. Should fit well - much better than it was. It's not as good as new, but...
  19. Keith S
    Thin wall bushing

    From the album: S-Cam Repair

  20. Keith S
    Both ends ground to size

    From the album: S-Cam Repair

  21. Keith S
    Final grinding

    From the album: S-Cam Repair

  22. Keith S
    Setup

    From the album: S-Cam Repair

  23. Keith S
    Final setup

    From the album: S-Cam Repair

  24. Keith S
    New setup

    From the album: S-Cam Repair

    Grinder is securely mounted to table in-feed
  25. Keith S
    Ready too

    From the album: S-Cam Repair

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