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: 5401
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

I just got a 2005 cat 305 my self and a mechanic looked over

Customer Question

Hi I just got a 2005 cat 305 my self and a mechanic looked over and put is through some of its paces when I got it home and put it to work I started to notes a problem when I operate thumb / dipper arm / and tracks this will drag the engine down and stall where do I start
Submitted: 1 year ago.
Category: Construction and Road Equipment
Customer: replied 1 year ago.
VIN cat00305cdgt01289
Expert:  Dan replied 1 year ago.

Hi Dennis. My name is***** will be glad to help. First check the fuel system and turbo. Check for restrictions or leaks sucking in air between the tank and pump, Replace the fuel filters and check for contamination or water in the old filters. If the fuel supply checks out good and the turbo then check the hydraulic filter for signs of fine metal/debris indicating a pump or component problem occurring. Also check the relief valve cartridges in the main control valve for sticking and return line restrictions.

Customer: replied 1 year ago.
I have done basics need more still dragging down engine
Expert:  Dan replied 1 year ago.

Thanks for the update Dennis, So you have good fuel pressure and it only does this when running those particular functions. If so what did the return hydraulic filter look like when you cut it open and inspected it? Was there any fine metal or metallic glitter in the oil from the filter?

Expert:  Dan replied 1 year ago.

The relief valves were free of metal, damage, and damaged o rings?

Expert:  Dan replied 1 year ago.

I have some schematics I can share if you do not have the manual

Customer: replied 1 year ago.
not tonight I need to get some rest I have been losing sleep to much I will talk to you tomarow
Expert:  Dan replied 1 year ago.

I was signing off myself. Sounds good.