HELP! Hatz 1b40 engine on my Cherry Picker

[Treeman123]

O right I see what you you mean now. Is there anyway of testing it before buying a new one?

[Treeman123]

3 minutes ago, openspaceman said:

Yes it would cut out whilst running if it is blocked fins but see what I wrote above. Once the engine has stopped the  airflow from the fan stops. So any residual heat from the engine continues to be conducted from the combustion area to the outside and fins but there is now no air flow, so the sensor (assuming it has one)  over heats and trips. It then has a hysteresis such that it has to become much cooler before it resets and you can star again. This was what happened on our lister 3cylinder powered Dosko.

O right I see what you you mean now. Is there anyway of testing it before buying a new one?

[openspaceman]

15 minutes ago, Treeman123 said:

O right I see what you you mean now. Is there anyway of testing it before buying a new one?

I don't know but you need to see if there is one first and that it is that tripping. Take some shrouds off and  search for a sensor screwed into the head. Chances are it shorts the supply to the fuel solenoid to earth when hot. You won't need a new one, it's doing its job of protecting the engine.

 

You could put a voltmeter from the fuel solenoid to earth and see if  it is  getting energised.

 

Make sure all shrouds are properly fitted, its the same as a chainsaw if you run without the covers on you'll seize it.

[Treeman123]

1 minute ago, openspaceman said:

I don't know but you need to see if there is one first and that it is that tripping. Take some shrouds off and  search for a sensor screwed into the head. Chances are it shorts the supply to the fuel solenoid to earth when hot. You won't need a new one, it's doing its job of protecting the engine.

 

You could put a voltmeter from the fuel solenoid to earth and see if  it is  getting energised.

 

Make sure all shrouds are properly fitted, its the same as a chainsaw if you run without the covers on you'll seize it.

Just had a look and it does have one, I will give all the fins a good clean and see how I get on. Thank you for your help

[Ratman]

Any joy?