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!!

Atlas Copco (dynapac) LH700 compactor, forward movement problem

Discussion in 'Other Compact Equipment' started by ROAMER_AUS, Jan 23, 2022.


    ROAMER_AUS Well-Known Member

    Sep 6, 2018
    Hi all,

    i have this compactor that has a problem going forward, reverse no problem, standstill no problem, but not moving forward. I have checked all the valves, they are all good. Checked weight moving cylinder pressure 50 BAR, as it should be. Now my hydraulic motor pressure should be 180 BAR, and it is fine when I'm reversing, but when I try to put it in forward motion, this pressure starts oscillating between 70 and 180 BAR. Anyone has good experience with these machine for some advice? My bet is that weigth moving cylinder is getting stuck at some point and can not move further to engage forward motion. But have no idea why motor pressure is ocillating. It is compacting properly, no problem in that matter.