Pulley removal help needed

[edmondo2000]

Hi there,
I have recently decided to try and repair an old Briggs & Stratton Rotavator/tiller engine (Model Number: 80202, Type Number: 0413-01). I was finding it an easy job to take it apart, until I tried to take off the pulley. I have no idea what tool I use to take off the pulley as it is a 5 sided allen key type hole, and no matter how much I try to search for a tool to fit this, I cannot find it. I was really just wondering if anyone knew what tool I should use, or if anyone else has encountered the same problem.

 

[mechanic mark]

Soak it down with penetrating oil & use proper size allen wrench.

 

[reynoldston]

I have to say that's a new one for me because I have never come across a 5 sided allen screw. Could it be something odd someone put in there? Maybe you might have to take a allen wrench and grind it to fit?? Any allen wrench I own has 6 sides.

 

[bertsmobile1]

Because I am old , I remember how things "used to be"
Back in the dark ages grub screws had square heads on them ( 4 sides ).
The railways used rectangular ones ( early tamper proof head ) and some busses had penta ( 5 sided) ones on the engine pulleys to prevent theft .
CCTV has rendered these extremes redundant now days but you might actually have one of these fitted.
Around the 70's to 80's they got replaced with hex holes.
Good chance you have an old square one that some one tried to remove with the wrong tool.
If worst comes to worst you can get extractors for removing rounded off Posi Drive & Philips headed screws.
There are good ones , made from tool steel and there are toy ones made from modified plasticine in China and sold at Harbour Freight, Wally mart, Lowes etc.
Go to a specialist machine tool shop or bearing shop and buy a good set.
Some places sell then as single heads for impact drivers and these are the best.

 

[reynoldston]

Because I am old , I remember how things "used to be"
Back in the dark ages grub screws had square heads on them ( 4 sides ).
The railways used rectangular ones ( early tamper proof head ) and some busses had penta ( 5 sided) ones on the engine pulleys to prevent theft .
CCTV has rendered these extremes redundant now days but you might actually have one of these fitted.
Around the 70's to 80's they got replaced with hex holes.
Good chance you have an old square one that some one tried to remove with the wrong tool.
If worst comes to worst you can get extractors for removing rounded off Posi Drive & Philips headed screws.
There are good ones , made from tool steel and there are toy ones made from modified plasticine in China and sold at Harbour Freight, Wally mart, Lowes etc.
Go to a specialist machine tool shop or bearing shop and buy a good set.
Some places sell then as single heads for impact drivers and these are the best.

Sounds like big money. It might be cheaper just to cut the old pulley off and install a new pulley?