JCB 801.4 engine stalls

[Malvern Michael]

My 801.4 when warm stalls when any load is put on whether tracking or bucket etc, immediately restarts but won’t tick over and dies again.
I replaced the fuel filter and fuel pump recently and also fitted a primer bladder all jcb parts, if I let it cool down it is fine for about 5 minutes work then stalling again.
There is no sign of overheating, I don’t know what to explore now as a fix, any suggestions welcome
Michael

[Muz]

Most likely be a fuel restriction somewhere, commonly something in the tank, or paint flakes in a banjo connector ... something like that

[v8druid]

Most likely be a fuel restriction somewhere, commonly something in the tank, or paint flakes in a banjo connector ... something like that

Think I'd have the priming bladder out for starters too ..... way I read that it, didn't have one originally??
valves in those things can be finnicky

jury rig a gallon can above the motor straight in and see what it does ... then work back

[Malvern Michael]

Thanks guys

Think I'd have the priming bladder out for starters too ..... way I read that it, didn't have one originally??
valves in those things can be finnicky

jury rig a gallon can above the motor straight in and see what it does ... then work back

I only put the bladder on because JCB don’t supply the original type pump with the primer leaver and they said this was the current option so if I remove it I have no way to prime the fuel line unless someone has a method they can share?

i think you are both on the right track as it didn’t do it before I changed the pump etc

[v8druid]

I only put the bladder on because JCB don’t supply the original type pump with the primer leaver and they said this was the current option so if I remove it I have no way to prime the fuel line unless someone has a method they can share?

i think you are both on the right track as it didn’t do it before I changed the pump etc

perhaps the arm is too short or the wrong shape and barely pumping, if it's a block mounted, cam driven jobbie

[Malvern Michael]

Hi, I bought it from a JCB agent with the serial number of my machine so I would hope it is the correct one 🤞🏻
Michael

perhaps the arm is too short or the wrong shape and barely pumping, if it's a block mounted, cam driven jobbie

[v8druid]

Hi, I bought it from a JCB agent with the serial number of my machine so I would hope it is the correct one ����
Michael

well you can but hope , but we are talking Jake 'stealer'/agent here ...... do you have the original to compare it with ??
as your issues all stem from the pump change, I'd be pinning a few quid on it being the issue