Bobcat 773 hydraulic problems

skidsteer.ca said:

Here is a link to a service manual to answer your questions.
http://www.mediafire.com/?xbfjawjpm81jc
Whats not 100%, the lifting ability? the speed of the drives?
Skidsteer.ca

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AU landscaper said:

The lifting ability. It still lifts but it sounds like its in a strain.

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skidsteer.ca said:

Is it making a squealing/whistling sound?
Likely the relief valve is getting weak. You need to hook a pressure guage to you front hydraulic couplers and see if the pressure is 3000 to 3150 (?) psi
If it makes the same squeal when pushing hard and/or lifting I'd say the main drive belt may be getting loose resulting in the engine no longer turning the pumps under high loads.
How many hours are on the machine?
Skidsteer.ca

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AU landscaper said:

The main drive belt is loose. I used it today and it squealed a lot. I let up the cab and could not find any adjustment on the belt. Do you know where the adjustment is to tighten it. Thanks.

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skidsteer.ca said:

Yes remove the plastic cover over the belt, loosen the bolt on the idle pulley on the idler with 9/16" wrench, use a prybar to push the idle down to tighten the belt.
There should be a pointer on the idler that points at 1 oclock when there is no tension on it and points to 3 when the spring is wound up. This point often falls off after 1500 to 2000 hrs though and may just be spinning around where ever it wants.
You really should download the book if you can. You should also remove the idler if you have time, remove the cover in the center on the front side and make sure it still has grease inside. My got dry in there and wore the brass bushing out of the center.
Here http://www.skidsteerforum.com/DesktopDefault.aspx?tabid=54&frmView=ShowPost&PostID=4139
is the thread on what happened when mine lost its grease inside.
Skidsteer.ca

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