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wiring

  1. J

    CAT 420F HAND THROTTLE SWITCH NOT WORKING - Need Wiring Schematic

    I recently bought a used '13 420F and among other issues I've found, the hand throttle dial doesn't work. I tested a few 420's at ritchie bros the month before I drove it and those didn't work either - is there some kind of safety switch or procedure to allow it to engage? It looks like the...
  2. C

    CAT 287B Alternator is good, but isn't charging

    CAT 287b, unknown year (I think around 2010?) Serial number ZSA02652 Battery won't charge.. New battery, alternator tests at 14v output on the bench, but once it's in the machine it doesn't charge the battery. If I disconnect the alternator from everything while the machine is running, I only...
  3. B

    BobCat 743B fuel shut-off problem, no start

    OK my 743B will not start, just cranks fast (new battery). I just replaced the oil pressure switch. The old one had a lug broken off but it still ran with out it. I replaced the switch while my son rebuilt the drive motor. After reassembling it wouldn't start, just cranks. I can hear the...
    • bkeese
    • Thread
    • solenoid start problems wiring
    • Replies: 11
    • Forum: Skid Steers
  4. D

    Cat 305 CR engine shut down troubleshooting

    2005 CAT00305CD5A00392 with K4N engine. Engine shutdown solenoid energized constantly. if I disconnect either wire at engine shut off solenoid engine starts and runs as expected. with key on or off i reconnect wire at solenoid, the engine shuts down. I have probed around and the 20 amp fuse...
    • DTIM
    • Thread
    • cat 305 engine shut down schematics throttle contol wiring
    • Replies: 9
    • Forum: Compact Excavators
  5. R

    Komatsu D-155AX-3

    Looking for someone to help me find where I can get a HMT controller tested. Went through trouble shooting guide and concluded that the HMT controller is bad but will cost $4300 and would like to get it tested before expending this money.
    • Russell Ludwig
    • Thread
    • d155ax dozer electrical help komatsu wiring
    • Replies: 2
    • Forum: Dozers
  6. S

    D6k Ac compressor has no power.

    Does anyone have a schematic on this? Someone chopped up the harness behind the compressor presumably to bypass something but I have no clue what they did or which of these 4 plugs go to the low pressure switch, refrigerant switch or the compressor.
  7. J

    JCB 505-22 Wiring Harness Fire

    I'm in the process of repairing the wiring harness on a 505. It appears that everything not related to steering had been bypassed. It looks like the only electrical flow through the harness was to the 4 solenoids and the 2 proximity sensors. Also had 2 lines to the fuel tank. I'm not certain...
  8. KCS snow pusher

    Head light issues

    2000 763g No head lights no working lights no tail lights. Power at fuses new relay i can here it click when the head light switch is switched on, lights on panel light up with switch. I checked grounds on cab power going in at plug no power at plug at head light.
  9. N

    2010 Cat 252B Intermittent Wiring Issue

    I have a 2010 Caterpillar 252BII with about 350 hours on it. It's been having some intermittent wiring problems. I would say about 5% of the time, the machine will not start. No power making it to the solenoid. When this is happening, there is power leaving the ignition switch, but it doesn't...
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