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There is a good "how to locate" article on this... it involves raising the cab and laying on the pump as you reach around the...

just remember to grease those zerks on the driveshaft,they are often overlooked.

My 743 would run fine for some period of time, then start dieing down and eventually die. It would start again, but just barely, and...

Older Bobcats are still around, and parts can be found. The 743 with the Kubota engine is a good unit... those old diesels want to...

Lift pump is the likely cause, the injector pumps can leak, but it is no where near as common.

I have installed electric pumps in place of the mechanical pumps to get the unit going the, key point is to bypass the mechanical pump...

From the rear (after you open the rear "hatch"), the lift pump is on the left side of the engine.... easy access. Look for fuel hose...