speeding up a 2 stage blower

[Wayne0 1,174]

Some where here, I saw how to speed up a blower by changing pulleys. Can't find it as it wasn't the subject of the thread. Anyone?

[Achto 29,385]

Do they really need to spin faster??

Bigger pulley on the drive or smaller pulley on the blower would do the trick.

 

 

I think adding the rubber paddles to the impeller would be a better up grade.  

[wallfish 18,072]

A smaller pulley on the gearbox that drives it

Or, a larger sprocket on that same gearbox (although there isn't much room)

Or a smaller sprocket on the rear of the bucket that turns the shaft

Moving the belt onto the larger PTO pulley

 

[ri702bill 9,359]

18 minutes ago, wallfish said:

Moving the belt onto the larger PTO pulley

And doing so, you can probably use the original belt...... Still like the idea to add the flap-a-doodles on the second stage impeller....

[Wayne0 1,174]

15 minutes ago, ri702bill said:

And doing so, you can probably use the original belt...... Still like the idea to add the flap-a-doodles on the second stage impeller....

This sounds good.

[wallfish 18,072]

30 minutes ago, ri702bill said:

add the flap-a-doodles on the second stage impeller

Definitely helps with the blower performance

[Ed Kennell 41,806]

   I did go to a 1" dia. smaller pulley on a single stage to increase the speed as the singles depend on the auger to push the snow up the chute.  And it made it easier to change the belt.

I don't understand why you would need more RPMs on the dual stage snow pump.     I run my dual stage on the inside PTO pulley because the inside pulley lines up better to the blower pulley.

 

 

 

 

 

 

[Wayne0 1,174]

Hey, Ed, I don't get out to this machine very often. I'll check which pulley it's on in the next couple days.I bought it the way it is and never paid attention. Worked OK last season, but could see room for improvement.

[c-series don 9,976]

I run mine on my inside pulley,(417-A) never had an issue. If the moisture content of the snow is just right it will throw snow to the phone wires! 

[mrc 937]

i have two identical walk behind blowers.  both are ariens ST1236's.  (12hp  36 inch cut)

 

as a test i put the rubber flappers on one of the blowers.  obviously on the inside fan/impeller.   the one that has the rubber flappers REALLY throws the snow further/better.  even the heavy wet sloppy stuff.  with the rubber flappers very hard to clog the chute too.

 

 

[wallfish 18,072]

2 hours ago, Wayne0 said:

Hey, Ed, I don't get out to this machine very often. I'll check which pulley it's on in the next couple days.I bought it the way it is and never paid attention. Worked OK last season, but could see room for improvement.

Check for the PTO bell slipping on the clutch. Or the belt slipping on there too. If that bell gets pretty hot under load it's from slipping friction of either or both slipping.

You can flatten the metal surface of the bell with a belt sander and I use a block with sandpaper to flatten the clutch material. The more surface area contact between those two, the less it will slip. Adjustment for the tension too.

The PTO pulleys on the 520 I got was used to run a 60" deck prior to me. The first time using it for the 2 stage there was horrible performance. Turned out the pulley grooves were worn and no amount of tension would work. Wasn't easily noticeable until an up close inspection of it.

[Ed Kennell 41,806]

1 hour ago, wallfish said:

Check for the PTO bell slipping on the clutch

I used a fine file and the engine to machine mine to get full contact.

 

Edited December 30, 2023 by Ed Kennell

[peter lena 9,242]

@Wayne0  its the  COLLECTIVE DRAG THAT KILLS  A BELT DRIVEN ATTATCHMENT !  ever notice how many guys are replacing ,PTO  driven  clutches ? the before and after detailing , and correct lubrication assurance , on any unit , is  amazing !  went after every related , intended bearing , rotational , point , went from dragging  a lead sled , to easy smooth spin up . my neighbors , screaming / squealing , belt drive , is very consistent in its dysfunction , Pete   

[squonk 43,744]

13 hours ago, c-series don said:

I run mine on my inside pulley,(417-A) never had an issue. If the moisture content of the snow is just right it will throw snow to the phone wires! 

Aiming for the street light with a single stage!