xcb
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New member looking for fuel pump replacement procedure for MF 231S with Perkins engine and Delphi fuel pump
MF 231S timing
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GManBart
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Welcome to TBN!
Generally speaking, it's pretty easy to replace the fuel pump on that engine. It's a smart idea to replace the fuel filter at the same time since you're already going to have to purge air from the system.
Close the valve on the line coming out of the fuel tank. Drain fuel from the fuel filter and remove element. Disconnect fuel lines from the fuel pump, and disconnect the pump from the block...make sure you get the old gasket off the block. Install the new pump with a new gasket, and connect the fuel lines. Put the new element in the fuel filter, and fill the bowl with as much fuel as you can without spilling it everywhere (I wind up spilling it anyway). Loosen the fuel line fitting that goes from the filter to the injector pump. Open the valve near the fuel tank to restore flow. Operate the lever on the fuel pump until you get fuel leaking from the fuel filter output line and there aren't any bubbles, then tighten that fitting. Wipe down spilled fuel, try starting the engine, and if it starts, check for leaks.
If it doesn't start pretty quickly, check for fuel flow getting to the pump, then leaving the pump, then getting to the filter, then leaving the filter, then getting to the injector pump, then leaving the injector pump, then getting to the injectors. When all else fails I've cracked all the fittings just a bit, so that they all leaked, then operated the pump until I don't see any bubbles anywhere, then start tightening at the injectors, and work backwards towards the tank, tightening as I go (not likely to be necessary). Having plenty of the fuel in the tank helps, and I've seen people actually put their mouth on the fuel tank filler to put a bit of pressure into the system (again, not likely to be necessary).
Generally speaking, it's pretty easy to replace the fuel pump on that engine. It's a smart idea to replace the fuel filter at the same time since you're already going to have to purge air from the system.
Close the valve on the line coming out of the fuel tank. Drain fuel from the fuel filter and remove element. Disconnect fuel lines from the fuel pump, and disconnect the pump from the block...make sure you get the old gasket off the block. Install the new pump with a new gasket, and connect the fuel lines. Put the new element in the fuel filter, and fill the bowl with as much fuel as you can without spilling it everywhere (I wind up spilling it anyway). Loosen the fuel line fitting that goes from the filter to the injector pump. Open the valve near the fuel tank to restore flow. Operate the lever on the fuel pump until you get fuel leaking from the fuel filter output line and there aren't any bubbles, then tighten that fitting. Wipe down spilled fuel, try starting the engine, and if it starts, check for leaks.
If it doesn't start pretty quickly, check for fuel flow getting to the pump, then leaving the pump, then getting to the filter, then leaving the filter, then getting to the injector pump, then leaving the injector pump, then getting to the injectors. When all else fails I've cracked all the fittings just a bit, so that they all leaked, then operated the pump until I don't see any bubbles anywhere, then start tightening at the injectors, and work backwards towards the tank, tightening as I go (not likely to be necessary). Having plenty of the fuel in the tank helps, and I've seen people actually put their mouth on the fuel tank filler to put a bit of pressure into the system (again, not likely to be necessary).
GManBart
Elite Member
- Joined
- Dec 10, 2012
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- 4,976
- Location
- Detroit, Michigan
- Tractor
- Massey Ferguson 241, Kubota SVL90-2
Did you get it back running?
I know this thread is 'older" but I need to know if the MF231s has to have the injector pump timed in order to remove it. I have a diesel leak that so far is leaking to the outside and not dumping diesel into the oil.
