buckets no working

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daflash

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Jun 26, 2007
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Bobcat 643. Moves around fine but lost most bucket action. Problem was intermintent at first but now its all gone, almost. Sometimes the up and down works unless I push the left peddle all the way back or forth. Tilt is completely gone. Any ideas? Thanks!
 

Tazza

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Check that your right steering lever isn't stuck in detent (stuck to the right). Jiggle it left to right and it should sit centre. If its stuck the oil will be going over the relief valve preventing you getting any oil pressure to the other functions.
If thats not it, i'd check your relief valve that is in the back of the control block. If there is something stuck in it you will not be able to generate any pressure as it just runs over the valve back to the tank.
If you have no drive issues i doubt it is the pump, but it could be a problem. Check the easy stuff first, then work to the more difficult/expensive stuff.
 

daflash

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Jun 26, 2007
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Check that your right steering lever isn't stuck in detent (stuck to the right). Jiggle it left to right and it should sit centre. If its stuck the oil will be going over the relief valve preventing you getting any oil pressure to the other functions.
If thats not it, i'd check your relief valve that is in the back of the control block. If there is something stuck in it you will not be able to generate any pressure as it just runs over the valve back to the tank.
If you have no drive issues i doubt it is the pump, but it could be a problem. Check the easy stuff first, then work to the more difficult/expensive stuff.
jiggled the handle and worked great. What is detent anyway? Thanks for your help!
 

Tazza

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jiggled the handle and worked great. What is detent anyway? Thanks for your help!
The right lever controls your aux. hydraulic flow to the quick couplers at the front of the lift arms. When you push it to the right it will *click* and stay there giving you hydraulic flow to the quick couplers for attachments like a excavator, Detent just means it locks in place. It will also make starting harder as it will create an extra load in the engine that needs to be overcome by the starter.
Glad it was so simple.
 

sterlclan

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May 1, 2004
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The right lever controls your aux. hydraulic flow to the quick couplers at the front of the lift arms. When you push it to the right it will *click* and stay there giving you hydraulic flow to the quick couplers for attachments like a excavator, Detent just means it locks in place. It will also make starting harder as it will create an extra load in the engine that needs to be overcome by the starter.
Glad it was so simple.
if you don't plan on using any hydraulic attachments there is a place in the base of that handle where a bolt can be put to lock the handle in the center unbolt and remove the seat and you can see where it would go ....Jeff
 

Tazza

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if you don't plan on using any hydraulic attachments there is a place in the base of that handle where a bolt can be put to lock the handle in the center unbolt and remove the seat and you can see where it would go ....Jeff
I was thinking that too, but if you have experienced it before you exactly where to start if it does it again.
There are a lot of people that will never ever use their aux. hydraulics so the bolt indeed is an option.
 

Fishfiles

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Feb 8, 2007
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Sound to me like the gear pump is worn , to check the flow and pressure you will need a flow meter , the gear pump controlls the boom , tilt , aux hydraulics and charge pressure on machines that use charge pressure
 
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