Mahindra 3510 will not shut off with key???

[Keith_B]

My issue turned out to be some bare wires under the radiator. The bare wires shorted and blew a fuse. After fixing the wires the issue was resolved.

 

[Spanner]

If it fails to stop in the future..... idle the tractor at it's lowest idle... then block the air intake. That should stop it.

:thumbdown: This is madness.

DO NOT DO THIS.:shocked:

A diesel engine will suck whatever you are trying to block the intake with. I once found a shirt-sleeve in an air-filter housing. Then I saw the guy wearing his one-sleeved shirt...

To stop a diesel engine you cut the fuel supply (only) somehow.

:wrench:

 

[rdinatal]

Question on the above post...

Why?

Other than ignition and fuel delivery both gas and diesel engines are both air pumps. While it's not advisable are you saying diesels are more dangerous?

-R

 

[vvanders]

Question on the above post...

Why?

Other than ignition and fuel delivery both gas and diesel engines are both air pumps. While it's not advisable are you saying diesels are more dangerous?

-R

Diesel engines have higher compression ratios + commonly include a turbo so in general pull in a lot more air. I recall a post a while back where someone tried to stop a run-away engine on a dozer with a large jacket and it just ate the thing whole.

Also sticking/blocking anything in a running engine is a pretty bad idea.

 

[rdinatal]

Diesel engines have higher compression ratios + commonly include a turbo so in general pull in a lot more air. I recall a post a while back where someone tried to stop a run-away engine on a dozer with a large jacket and it just ate the thing whole.

Also sticking/blocking anything in a running engine is a pretty bad idea.

Yeah, I guess they're a lot bigger than lawn mower engines!

-R

 

[Spanner]

Question on the above post...
While it's not advisable are you saying diesels are more dangerous?

-R

In a word - Yes. At least in attempting to stop one by blocking the air supply.
The diesel has higher compression and correspondingly higher 'suction'.
It has the ability to, literally, suck the sleeve off your arm. In extreme cases 'De-gloving' the skin off your hand is possible.
Check your tractor - If it's a diesel the method of stopping the engine will be either a mechanical linkage or electric solenoid which... Shuts off the fuel supply, not the air supply.
Stuffing a rag in the intake often fails as the engine will suck air through the cloth, as you may imagine, and keep running.
Diesels have externally vented crankcases also. Unlike a petrol engine where the crankcase vents into the intake manifold (PCV) the diesel vents to open air so that the diesel cannot 'run-away' on it's own crankcase vapours.

There are such things as "Diesel Engine Air Intake Shut-Off Valves" but they are substantially constructed mechanical devices and are fixed in position as an emergency last-resort which keep clothing and body parts out of the intake system. Diesel Engine Air Intake Shut-Off Valves

I don't want to labour this point. - Just be aware of it.
:wrench:

 

[Spanner]

Yeah, I guess they're a lot bigger than lawn mower engines!

-R

The incident I mentioned with the 'one-sleeved shirt guy' (above) was involving a single cylinder diesel ride-on lawnmower engine. An Italian-made Lombardini vertical crankshaft engine on a Westwood 36" rider in England, UK. - Just a lawnmower engine.
:wrench:

 

[Navasot]

get a new key switch

 

[Keith_B]

get a new key switch

Use the manual fuel shutoff.

 

[Navasot]

Use the manual fuel shutoff.

that works just as good! lol there were a few that only offered the electric kill also