JD 317G, At full throttle and full speed traveling forward when trying raising the loader arms or using the bucket, the machine slows to a creep, until not using those functions. Already checked fuel suction line and replaced air filters & both fuel filters, Any help would be great.
Lets start with a serial number please. So, the engine is bogging down? Are there any codes? Press and hold the menu button until in service mode. Then scroll to codes and post codes if any (active and stored). Then clear the codes (can only be done in service mode). Run it and lets see what comes back.
1T0317GJEGJ301950, No codes
I would recommend checking the low pressure fuel system pressure. You will have to tee into the HP pump supply line (and it's not easy). It is very low pressure if I recall correctly. Like 1.5 - 2 psi. Or check low pressure fuel pump flow (spec - 15 oz per minute).
Is the low pressure pump the electric pump above the fuel filter ?
Yes, just above the water separator filter. Make sure it maintains positive pressure when the engine issue is happening.