Posting for my brother he has late model 4020 with the small fuel injection pump. This tractor has set in a heated shop for abount ten yrs. The motor is free drained fuel ot of tank and changed fuel filters. He has fuel to the injection pump but nothing out of pump. The electic shut off clicks when you turn key on but no fuel out of injection lines when you crank engine over. We have tried to pull start also but no fuel out of injection lines when pulling tractor. This was my fathers tractor and would like to get it running again. Tractor ran good when placed in shed. Any help or ideas would be appreciated.