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  1. anuradha

    Komatsu pc 120 - 6E Stick couldn't retract fully & slow movement.

    Hi, Komatsu pc 120 - 6E Stick doesn't retract fully & slow movement. At the moment don't have the serial number. In this machine bucket also slow in operation. Stick doesn't retract fully and slow in operation even without a load. when control levers bring to neutral position stick extend...
  2. anuradha

    Cat 312B Swing Motor Leaking...

    Hi every one , Our cat 312b excavator's swing motor is leaking from this alen key bolt. i think may be an oring is bad if not what will be the cause for this ?. may i know that how can i repair it. from where should i disassemble it ? Thank You.
  3. anuradha

    Komatsu pc 30-3 hydraulic pump problem

    Hi every one, One of my friend has done some works on the pump of komatsu pc 30-3 . i still did not get the serial number yet. They have replaced all the orings(seal kit) of the pump and have polished both sides of these two parts using a ameri paper. (Picture shows only one part ) After...
  4. anuradha

    Cat 312BL Warning lights comes on.

    Hi, As this image shows this CAT 312BL machine with serial number 9FS00946 shows these alert lights even after engine is started. After starting the engine, bottom 03 alert indications & charge alert indicator should be turned off if these fluid levels ok and relevant sensors, ecu ,monitor...
  5. anuradha

    "Youtube channels for learning" ???

    Hi, I would like to know about good youtube channels that covers about heavy equipment troubleshooting and that explain certain things like "how machine's systems work" etc. So as experienced people do you have any good suggestions regarding good youtube channels that conduct videos in english...
  6. anuradha

    Cat 312BL hydraulic heating problem.

    Hello everyone, Cat 312BL excavator serial number 8JR... We had a hydraulic heating problem since some time. Replaced two hydraulic fitters but nothing changed. Looked at fan belt, cleaned the radiator,sealed the gap between radiator and oil cooler, didn't inspect the return filter(big one)...
  7. anuradha

    Hitachi Landy 120-2 engine loading problem.

    hi, i am dealing with a problem of engine gets loading of a hitachi landy 120-2 excavator of my friend, even stops when operating conrol levers. this has happened suddenly. so can any one help me to find possible causes for this kind of fault and what are the things should i check ? (rpm sensor...
  8. anuradha

    Caterpillar (Service Training Meeting Guide Documents).

    Hello every one, I need to know whether i can obtain Service Training Meeting Guide documents from cat sis (service information system) programm. If it can be done please tell me the method of obtaining it from caterpillar sis. Thank you.
  9. anuradha

    Cat 312 boom pressure switch replacement.

    Hi everyone, We need to replace the boom pressure switch of cat 312 7dk model.its original part no was "102-8042" but in the past one technitian replaced it with the part no "126-2938X00" 20ps 767-8 T8z and it worked fine untill now. We have to replace it again.so i need to know that can...
  10. anuradha

    How often should we replace pilot pump hydraulic filter...

    Hi every one, we did some repairs on our cat 312 7dk and now i need to know after howmany hours should we replace this pilot pump hydraulic filter. Already we have completed over 4000 hrs after purchasing this machine as a secondhand one.we didnt replace it yet.we didnt had any issue with it...
  11. anuradha

    How to assemble cat 312 hydraulic pump mount to fly wheel...

    pump. Hi.we had some issue with our cat 312 hydraulic pump mount and we had to replace some parts.but now we want to know the correct procedure of reassembling pump to fly wheel end.please help us. Thank you.
  12. anuradha

    Cat 312 excavator ecm problem.

    Hi everyone, We had some problems with our cat 312 excavator's ecm earlier. About 06 months a go we repaired it due to some defects by giving it to a technician by spending a lot of money.however after repairing the ecm it was working fine until now. But yet again it is giving us a lots of...
  13. anuradha

    Requesting testing & adjusting section for cat 312bl ser.no 8jr.

    if some one can help me, please provide the testing and adjusting section for cat 312bl 8jr. then it will be a great help for me in handling some issues with this machine.thank you.
  14. anuradha

    Looking for Cat 312 7dk service manual.

    If u have cat 312 excavator 7dk service manual please inform me.it will be a great help for me .thank you.
  15. anuradha

    Cat 312 controller's yellow and green lights illuminating....

    Cat 312 excavator controller's yellow light and green light illuminates after key turned off.this green light suppose to off when key turned off now insted of that yellow light aloso illuminating together with green light after key turned off.need some help.... Thanx.
  16. anuradha

    Excavator shut down relay clicking several times.

    My cat 312 excavator shut down relay clicking happens several times when i turn key sw to off position from on position. If u all know the reason please help me.
  17. anuradha

    What is the function of excavator safety relay ????

    Safety relay which connects to alternator,starter relay, key switch,ground and controller.via wires. What is the function of this kind of a safety relay.
  18. anuradha

    Need help with cat 312 excavator

    Machine doesnt shut down after key switch is offed.
  19. anuradha

    Excavator doesn't shut down after key turned off ???

    My ca 312 Excavator doesn't shut down after key turned off.shut down solonoid and its relay and its connection good.but engine doesn't shut down.
  20. anuradha

    Cat 312 excavator doesnt stop after key switch is off

    My cat 312 excavator doesnt stop after i turned off the key.i cheked the stop solonoid and its relay and its wiring its ok.i noticed when i turn on and off the key switch i noticed a click sound comes from stop relay two three times after some time a go.and controller green light doesnt stop...
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