763f

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nick-osborne

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Joined
Jul 17, 2007
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4
i notice when using the bobcat it well lose a lot of its power in the arms and bucket but it dont lose anypower in the drivetrain. if you get suck in the mud and it acting up it dont even have the power to use the buck to dig in and push your self out and i notices when you pick up somehting kinda heavy maybe like 2000lb the arms well slowly go down by them self is that normal?
 

Tazza

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Dec 7, 2004
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Cylinder creep is normal. I think the acceptable amount is a few inches per hour with no bucket attached.
As for the lack of power, it sounds like you have a problem with your relief valve or a pump problem. The hydraulic system is separate from the hydrostatic system (drive). You have 3 separate pumps. Thats why your drive is fine. The hydraulic pump does act as a charge pump for the hydrostatics but that doesn't need much pressure or flow.
I would start by hooking up a pressure gauge to the quick couplers and check what your pressure is. It should be between say 2,400 and 3,000 PSI. The newer machines run higher pressures than the older ones. If its way low it sounds like a relief valve problem.
 

skidboy

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Joined
Jan 3, 2007
Messages
94
Cylinder creep is normal. I think the acceptable amount is a few inches per hour with no bucket attached.
As for the lack of power, it sounds like you have a problem with your relief valve or a pump problem. The hydraulic system is separate from the hydrostatic system (drive). You have 3 separate pumps. Thats why your drive is fine. The hydraulic pump does act as a charge pump for the hydrostatics but that doesn't need much pressure or flow.
I would start by hooking up a pressure gauge to the quick couplers and check what your pressure is. It should be between say 2,400 and 3,000 PSI. The newer machines run higher pressures than the older ones. If its way low it sounds like a relief valve problem.
I would check your main drive belt.I think it may need adjusting.
 

nick-osborne

New member
Joined
Jul 17, 2007
Messages
4
I would check your main drive belt.I think it may need adjusting.
i thought it was the main drive belt but it is supper tight, and i forgot a say when it acts up the arms and bucket moves like at 1/2 speed just wondering to if you have wiring diagrams for the 763f i need them for the breaks system, back up light and the power wire for the fan switch is died :S and does anyone know why the fuel gauge dont work ? or could maybe tell me what you think is wrong with them i was told there is a chain oiler on this bobcat but i looked every where and couldnt find one
 

skidboy

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Joined
Jan 3, 2007
Messages
94
i thought it was the main drive belt but it is supper tight, and i forgot a say when it acts up the arms and bucket moves like at 1/2 speed just wondering to if you have wiring diagrams for the 763f i need them for the breaks system, back up light and the power wire for the fan switch is died :S and does anyone know why the fuel gauge dont work ? or could maybe tell me what you think is wrong with them i was told there is a chain oiler on this bobcat but i looked every where and couldnt find one
I think i would be getting a dealer to have a look at it,otherwise buy yourself a workshop manual,and sit down and have a good read.
 
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