753 boggs down need some advice

[TJ]

I was wondering if any one new or has had this problem?I have a bobcat 753 g 2001 and when I start to dig most of the time the machine will bogg down pretty good just about to stall then I back down and the rpms come back up.I do not think that I am digging to deep.The machine seemes to bog down pretty good not sure what to do.Is there a adjustment or something I can do or a valve that needs to switch ..Seems like my buddies will push and dig much better with out bogging down any help would be great..Thanks

 

[Tazza]

That machine should dig pretty hard before it bogs down. I would start by changing the fuel and air filters. Do you get any smoke when it bogs down? does it start and run well? how many hours?
I have one of these machines, it takes a LOT of load to get the engine to even look like stalling.

 

[TJ]

That machine should dig pretty hard before it bogs down. I would start by changing the fuel and air filters. Do you get any smoke when it bogs down? does it start and run well? how many hours?
I have one of these machines, it takes a LOT of load to get the engine to even look like stalling.

It has 1200 hrs.. I changed the fuel filter all fluids all filters 2 months ago.No smoke at bog down..Starts great seems to run good.Just seems to bogg down with teeth on and just trying to strip like 4in of sod off pushes pushes and seems to bogg down I have stalled it out..

 

[skidsteer.ca]

It has 1200 hrs.. I changed the fuel filter all fluids all filters 2 months ago.No smoke at bog down..Starts great seems to run good.Just seems to bogg down with teeth on and just trying to strip like 4in of sod off pushes pushes and seems to bogg down I have stalled it out..

On a diesel it is almost always a fuel supply thing. Have you drained the water separator on the bottom of the fuel filter? Water may have got in the tank somehow.
Try a new filter.
Then failing that put a can of fuel up on the rear of the loader and start a siphon with a hose attatched to the inlet on the fuel filter and see if that helps. Could be a problem with the fuel inlet screen, a crack in the fuel line allowing small amounts of air in the line, a fuel pump with low pressure.
Ken

 

[mrfixitpaul]

On a diesel it is almost always a fuel supply thing. Have you drained the water separator on the bottom of the fuel filter? Water may have got in the tank somehow.
Try a new filter.
Then failing that put a can of fuel up on the rear of the loader and start a siphon with a hose attatched to the inlet on the fuel filter and see if that helps. Could be a problem with the fuel inlet screen, a crack in the fuel line allowing small amounts of air in the line, a fuel pump with low pressure.
Ken

Is the drive belt loose? maybe losing drive not engine power.

 

[Tazza]

Is the drive belt loose? maybe losing drive not engine power.

The only other thing i can think of, when it bogs down, give the primr bulb a squeeze while the machine is running. Does it stay flat? if so, you have a blocked pickup screen in the fuel tank. Ensure the screw on the injector pump is tight that you loosen to prime the fuel system. It needs to be closed or it won't run correctly.
Good idea on the drive belt.... If the engine actually bogs down, its not the belt, but if you loose power and the machine stalls but the engine does not, it will be a slipping belt.