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
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 4373
Experience:  17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
65405794
Type Your Construction and Road Equipment Question Here...
Dan is online now
A new question is answered every 9 seconds

I have a cat 303.5 and it has no hydraulic power very weak

Customer Question

I have a cat 303.5 and it has no hydraulic power very weak the engine runs fine and the longer it runs the weaker at the hydraulic gets
Submitted: 1 year ago.
Category: Construction and Road Equipment
Customer: replied 1 year ago.
OK I just started it back up and it runs like new again maybe there's a solenoid not working and restricting flow
Expert:  Dan replied 1 year ago.
Hi my name is***** will be glad to help. First check for fine metal in the return hydraulic filter indicating a pump or component problem. If ok then check the relief valves in the main control valve for metal causing them to stick or damaged o rings causing a bypass of pressure. Finally testing your system pressures and confirming they are within specs is the next step id no metal or no relief valve problems are found. Here is a schematic and some troubleshooting info to help. Let me know. Schematic

Related Construction and Road Equipment Questions