How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dan Your Own Question
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 4291
Experience:  17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
Type Your Construction and Road Equipment Question Here...
Dan is online now
A new question is answered every 9 seconds

My 330Cl serial *CAT0330CEDKY01485*everything working

Customer Question

My 330Cl serial *CAT0330CEDKY01485*everything working perfectly but if release the boom and you go down its like something is broking the hydraulic system
Submitted: 25 days ago.
Category: Construction and Road Equipment
Expert:  Dan replied 25 days ago.

Hi Emmanuel, It is Dan. Can you provide more detail in what is happening? Is the boom going down on its own with the controls released? If so check for sticking pilot plungers under the joystick control handle and boot. They are known to stick and if so you can replace the plunger. If thats okay check the boom relief valves and the control valve spool for damage or not centering from broken springs etc. Also check the cylinder for bypass in the seals of the cylinder. Let me know.

Related Construction and Road Equipment Questions