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Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 27480
Experience:  Technican turned service manager with multiple lines of equipment and rental units.
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873 bob cat wont lift, don't know machine is on job, yes was

Customer Question

873 bob cat wont lift
JA: What is the complete model and serial number of your machine?
Customer: don't know machine is on job
JA: Are you fixing this yourself? What have you tried so far?
Customer: yes was working fine a little weak started getting slower now wont raise bucket
JA: Anything else you want the construction mechanic to know before I connect you?
Customer: no
Submitted: 8 months ago.
Category: Construction and Road Equipment
Expert:  Curtis B. replied 8 months ago.

Hello! Let's see if we can work together and come to a satisfactory conclusion!

Expert:  Curtis B. replied 8 months ago.

Started getting weak, then won't lift bucket is classic hydraulic pump failure. The hydraulic pump is the small pump on the unit, and does not affect the drive pumps. I would check hydraulic pressure, which needs to be 2300 psi, and I suspect it is down below 500 psi, which means the pump s bad. You will need new pump, filters and oil.

Customer: replied 8 months ago.
replaced pump last year how do I check pressure
Expert:  Curtis B. replied 8 months ago.

0-3000 lb gage installed in the control valve test port or in teed into one of the cylinders, then bottom out cyinder and read gage.

Customer: replied 8 months ago.
checked this morn raised up and down then got weak held buck poisiton button came up shut dn then 13.0 id #514150856
Expert:  Curtis B. replied 8 months ago.

?? So pressure feel off when warm? Classic pump failure.

Customer: replied 8 months ago.
how hard to change pump
Expert:  Curtis B. replied 8 months ago.

Two hoses, the intake and the pressure hose has to be removed, then the pump mount bolts removed, and the pump will slip out.

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