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Recent content by digger_hunter

  1. digger_hunter

    312D cat swing brake solenoid location

    might be on the swing motor itself. not sure but have a look on the swing motor and could be on there.
  2. digger_hunter

    315C bogging down under load

    did you calibrate the PRV solenoid?
  3. digger_hunter

    CAT 311D excavator - low engine power/hydraulic overload

    actually to check the wiring you could swap the plugs first if the harness is long enough to do that before you swap the sensors
  4. digger_hunter

    CAT 311D excavator - low engine power/hydraulic overload

    could me the pump pressure sensor is malfunctioning. Did you check the pressure in computer compares to actual using a gauge? the issue could also be the PRV is malfunctioning but better check the main pump sensors are working correctly before that. we have had several where the sensor reports a...
  5. digger_hunter

    Radiator Foam Seals

    yeah definitely get some fire retardant ones rates for that sort of temperature
  6. digger_hunter

    93 cat 312 not cooling down fast and looses power

    just to double check the engine bogs down from the go or just after the oil warms up? if you want you can give me a call, pm me and I can share my number
  7. digger_hunter

    93 cat 312 not cooling down fast and looses power

    Can you run on manual mode and see if the problem reoccurs. Just wondering if the PRV solenoid is getting hot and not working properly when it’s running hot and causing your engine to bog down. If you run in manual mode the PRV holds at a constant level. It will bog down when you load the...
  8. digger_hunter

    93 cat 312 not cooling down fast and looses power

    so cooler is working. have you checked the pipe that goes to teh tank from the main control valve? and temp of the tank?
  9. digger_hunter

    93 cat 312 not cooling down fast and looses power

    I would do that as it would take you far longer each time to wait for hydraulics to cool to diagnose the problem "the correct way". you could just jam the valve first thing and see if that works first otherwise you won't be able to touch anything there with the hydraulic oil hot
  10. digger_hunter

    93 cat 312 not cooling down fast and looses power

    not sure, could be the normal return noise. it could be related but can't be sure. one way to quickly check is that the return line to the tank should not get super hot because the valve should be shut, but quickest way to eliminate is to take the think out, jam it with a few appropriately sized...
  11. digger_hunter

    93 cat 312 not cooling down fast and looses power

    Well since the pump is not producing pressure and flow as per target the negative control system would cause the pump swash angle to increase and put more load on the engine. So it could cause the engine to bog down. so the return flow out of the control valve goes into a T and one side goes...
  12. digger_hunter

    93 cat 312 not cooling down fast and looses power

    I think the battery lights a bit of a red herring, the problem is in your hydraulics. Do you notice that you have to run the machine at higher revs when you first start it to get it to work at a decent pace? that could point to a relief valve issue. otherwise I think this could be yet another...
  13. digger_hunter

    93 cat 312 not cooling down fast and looses power

    yeah thats too hot man and the machine would slow down for sure at those temps
  14. digger_hunter

    93 cat 312 not cooling down fast and looses power

    to calibrate the PRV accurately you need a 0-50bar pressure gauge and tweak the PRV pressure range using the display. theres. a whole procedure to that and maybe Nige can share the part of the manual thats how's how to do it. you could do it without a gauge and ballpark it after a few attempts...
  15. digger_hunter

    93 cat 312 not cooling down fast and looses power

    so if you put a PRV in you need to calibrate it. Have you tried running it in manual mode (flick manual switches on right hand side and left hand side of arm rests) and see if the problem improves. I think the problem is the hydraulic oil is overheating (should be around 60-65C max). So the...
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