1. Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!
  2. ALL NEW MEMBERS READ THIS FIRST!! Thank you for joining Heavy Equipment Forums! If you are new to forums we communicate with "Threads", please search our threads to see if your topic may have already been answered and if not then click "Post New Thread" in the appropriate forum. This will allow all of our members to see your question and give you the best chance to be answered. After you've made a number of posts you will graduate to Full Member status where you'll see a few more privileges. Following these guidelines will help make this the best resource for heavy equipment on the net. Thanks for joining us and I hope you enjoy your stay!!

volvo 120d problems again

Discussion in 'Wheel Loaders' started by truecountry, Feb 10, 2010.

  1. truecountry

    truecountry Senior Member

    Joined:
    Sep 25, 2007
    Messages:
    390
    Occupation:
    Shop Manager and Tech
    Location:
    clarksville va
    ok ive posted about this loader couple times and dealer sent out a head tech fixed some of the park brake locking up problems but it had issues that gosh i cant list them all but ill list what happened this week ... its cold as u know what here in va ... the operator has been cranking loader and letting it warm up 30 mins or so before moving .... well he complained that it would start forward and stop in neutral,, same in reverse.. ... error codes on dash display , error in speed control, error in revolutions, nothing made any sense.. until this morning it wouldnt move..we had a guy to train on this loader and tore the left battery box cover off so its been exposed to the mud and rain .he got fired the next day...... i notice the positive battery cable end was warm to touch so we replaced end it was corruded up trimmed wire back a inch...still would not move a noticed rpm dropping from 720 to 700. called dealer and was tolded call back later ... i pulled parts book looked up all sensors on trans ,,, the first i pulled was closest to engine over the flywheel it was ding up a lil on face but i ohmed it out and showed 1021 ohms . im thinking i wish i knew what it was on paper i didnt have a clue ... i went back to parts book and wow the front sensor below cab and front of trans had same parts number .... hehehehe i ohmed it out 1021...then hehehe went sour.they both ohmed the same damn ....again i had it in my mind batteries and charging system .... basic stuff cranks off batteries runs off alternator... i fished around wiring harness and wow i found a huge ass electric tape mess hidden behind hoses and pipes above alternator .. now this is a 2 wire alternator , the wire that was altered was back to starter im guessing bigger then a pencil .. i cut black tape away and oh wow what hack did this
     

    Attached Files:

  2. truecountry

    truecountry Senior Member

    Joined:
    Sep 25, 2007
    Messages:
    390
    Occupation:
    Shop Manager and Tech
    Location:
    clarksville va
    look at the red wire it is factory why do this ... i soldered ends on and cut red wire 8 more inches back cause it was melted and used a 3m maxi pad 6x6 to keep moisture out and ordered a new wire from starter to alt .. my thing is with this much corrodtion in wire and moisture could it be my main problem.. computers on board need the exact voltage and its noway it has it like this .........ill see tomorrow morning but it ran like a champ for 4 hours this evening no er codes
     
  3. icewater75074

    icewater75074 Member

    Joined:
    Jan 28, 2010
    Messages:
    17
    Occupation:
    Field Tech.VOLVO Equip.
    Location:
    Texas
    Was the dealers tech responsible for this repair?
    We don't even stock those types of connectors at our shop (VOLVO dealer), they are used for temp. genset connections and ground circuits in temp. power set ups.
    Do you have service records for this vehicle? If so, is it possible to search the electrical issues and narrow down the time frame for this repair?
     
  4. truecountry

    truecountry Senior Member

    Joined:
    Sep 25, 2007
    Messages:
    390
    Occupation:
    Shop Manager and Tech
    Location:
    clarksville va
    this was not a dealer splice , just jackleg mech trying to jump start it about 4 years ago burnt up alternator and wires this was his fix before they fired him.....