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Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 26287
Experience:  Technican turned service manager with multiple lines of equipment and rental units.
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I have a small bobcat with hydraulic pb the bob moves

Customer Question

Hello
JA: Hello. What seems to be the problem?
Customer: I have a small bobcat with hydraulic pb the bob moves forward and backward but would not lift. I checked the hydro fluid levels
JA: Sometimes things that you think will be really complicated end up being easy to fix. The heavy equipment mechanic I'm going to connect you with knows all the tricks and shortcuts.
Customer: thanks
JA: Are you fixing this yourself? What have you tried so far?
Customer: Yes and not much
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: battery was dead, but I do not see any correlation
Submitted: 2 months ago.
Category: Construction and Road Equipment
Expert:  Curtis B. replied 2 months ago.

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

Expert:  Curtis B. replied 2 months ago.

Model number? Usually the drive is separate from the hydraulics. Is the hydraulic pump turning?Or could pump drive /coupling be broken? Do you have hyd oil flowing if you loosen pump outlet hose?

Customer: replied 2 months ago.
Hello
I have this bobcat that I don't use much, battery was dead so I started with starter cable; the main arm would not lift. I checked the fluid level, and had repaired a leak. What could be the problem? thanks for your help
Fred
Expert:  Curtis B. replied 2 months ago.

Does it have the solenoids that lock the hydraulics ? If so, lack of voltage to the hyd lock solenoids will keep hydraulics from working. Does Bobcat start on it's own battery now?

Customer: replied 2 months ago.
No; it doesnot start on its own battery
Expert:  Curtis B. replied 2 months ago.

If it has the lockout solenoids, you need good battery.

Customer: replied 2 months ago.
how can I know if there are lockout solenoids?
Customer: replied 2 months ago.
it s S55 model
Expert:  Curtis B. replied 2 months ago.

Need a parts book that would show it. But does the engine seem to lug down if you select a hydraulic function? If it does, the solenoids are there, and not opening.

Customer: replied 2 months ago.
sorry I made a mistake it is not S55 it is 553
Customer: replied 2 months ago.
the engines slows down a bit; more noticeable at lower rpm
Customer: replied 2 months ago.
ok. could it be that the alternator doesnot provide enough juice for the solenoid.
Expert:  Curtis B. replied 2 months ago.

It has the hydraulic lock solenoid, one on the bucket hoses and one on the boom hoses. They require battery voltage to open, and let hydraulics work. They are controlled by seat belt and seat switches. Battery has to be good enough to start engine, and the charging system has to keep voltage up.

Customer: replied 2 months ago.
I am going to check this out and I'll come back to you.
F
Customer: replied 2 months ago.
I actually had lunch and checked it out and you were totally right.
I changed the battery and verified that 14.0V were coming from the alternator (so it's charging); the Bob started right away of course and the arms are lifting without problem.
Thank you so much for your help.
Fred
Expert:  Curtis B. replied 2 months ago.

Good job! Please use the 5 star rating system to close the question, and get me credit! Thanks

Customer: replied 2 months ago.
I just did. Did it show up?
fred
Expert:  Curtis B. replied 2 months ago.

Not yet!

Expert:  Curtis B. replied 2 months ago.

I see question is still open, and not rated.??

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