Mini Digger Fermec 114 - power issue - remote diagnosis

[MF35]

Hi, always found this forum very good for solving problems.

Mini digger is losing power when under load such as moving and using hydraulics.

Anyone know of an experienced engineer who might be willing to diagnose problem remotely by use of Zoom or FaceTime or similar? Happy to make reasonable payment or donate to UK based charity of choice if time given to rectify.

 

[Vizslaman]

I am guessing you have checked the usual, Blocked air filter or fuel filter not got a crushed fuel pipe ?.

 

[MF35]

Thanks . Yes have checked those and replaced some of the filters.

 

[njneer]

Check if it has mechanical
Lift pump , check banjo bolts at lift pump .
If it has one of those ball squeeze primers check it’s not bunged with dirt .

 

[MF35]

Lift pump is mechanical. What am I looking for in terms of the banjo bolts ? No primer bulb/ball.

 

[Kevm]

So just to be clear the engine starts, runs and sounds fine but when you try to move the arm or tracks it starts to labour the engine???
Have I got that right? if so then it is some sort of major restriction in the hydraulics.

 

[MF35]

Thank you. In part yes. If I try max revs even at standstill it is unhappy and it is necessary to throttle back.

 

[Kevm]

If it wont go to full revs at standstill then it probably is an engine problem.

 

[Sparkplug]

Is there a suction filter in the bottom of the diesel tank? Try blowing down pipe to tank with airline in case there is a suction filter partially blocked that is starving the engine under load

 

[njneer]

Lift pump is mechanical. What am I looking for in terms of the banjo bolts ? No primer bulb/ball.

Depends on the set up but some times if the fuel pipes have a round bulbous ( banjo ) shaped fitting with a hollow bolt through them .
Check if the lift pump has a small bolt in the centre , if so slacken and remove the cap and there may be a filter in there .

 

[MF35]

Thanks to everyone who helpfully replied. Diagnosed problem - on/off tap not fully opening to allow correct volume of fuel. All up and running again.