First, have you a clean diesel filter? Dont forget to clean out the water trap filter bowl inside the left chassis leg, below where the loader lift ram is connected. If all is good and problem remains, try a good dose of " diesel fuel injector cleaner". If this cures the problem, even for a few hours, then you need to take the injector pump off and have it overhauled. Its a pig of a job as you have to remove the geardriven water pump, and thats quite tight to the radiator cowl, so you will have to slacken off the 4 bolts holding the rad in place to move it forward. prop up the loader arms SECURELY. If they creep down before the pump gets back to you, it dosent make the job any easier!
Nigel in Cavan, August 2009