Clutch Help

[suntiet]

Hello All. I am looking for some info on how to adjust my clutch, or size the belt or whatever it is i need to do to get some more low end.

It is a hustler 900hk machine, has a Carroll stream motor company 16hp 4 stroke motor t-20 transmission. I just recived a new set of splined axles and sprokets from Apache gear, i went down a couple teeth in the geering so that should help.

What's happening now is it needs really high RPM to get any power to the wheels. I was hoping to be able to change belt/adjust clutches for more low end hill climbing/swamp crawling.

This is my first 6x6 and i am new to these set ups, i want to do it right so a different engine is not out of the question but i would rather run this one if i could, for now at least.

My plan is to run 25 inch aquatorques, mostly low end power is what i am after. Any help in getting this set up would be great, gonna run it in Alaska, bogs, peat, rocky ATV trails, not much swimming but i do need ideas about crossing streams with current.

THanks

[Tomo]

hi
first identify clutches brand model size etc
1 are the clutches a set eg both 700 series primary and secondary
[a set that can actually run together according to the maker]
2the centre to centre distance have the correct belt
3 correct belt width for clutches
4correct belt fitting width and cen to cen will give u the correct belt deflection
5once all the criteria are met check clutch engagement 1400-1600 rpm

nb secondary should have approx. 28 degree ramps [some r 41 degree ][high degree ramps will give fast up shift but slow down shift ] , then install red spring
## remember that clutching is only for gear changing not your overall which is your axle/ t20 ratio
A suggested t20 ratio to start with for 16hp t20 15teeth [stock] axle 28-30 teeth .Others on the site may give u a better idea for a hustler .

tomo

[thebuggyman1]

It looks like your belt is way too loose...and that would cause a loss of low end.
Read this ATV and Snowmobile Belts - by Dayco

[suntiet]

hi
first identify clutches brand model size etc
1 are the clutches a set eg both 700 series primary and secondary
[a set that can actually run together according to the maker]
2the centre to centre distance have the correct belt
3 correct belt width for clutches
4correct belt fitting width and cen to cen will give u the correct belt deflection
5once all the criteria are met check clutch engagement 1400-1600 rpm

nb secondary should have approx. 28 degree ramps [some r 41 degree ][high degree ramps will give fast up shift but slow down shift ] , then install red spring
## remember that clutching is only for gear changing not your overall which is your axle/ t20 ratio
A suggested t20 ratio to start with for 16hp t20 15teeth [stock] axle 28-30 teeth .Others on the site may give u a better idea for a hustler .

tomo

Thanks for the info, How do i identify the clutches? And where would i find the correct belt size?

[gearhead1937]

Maybe a new belt... everything i.ve read says the belt should be sitting above the secondary clutch by about an eight of an inch.

[thebuggyman1]

You have a comet secondary (measure the diameter for the series), probably a 780 @ approx 9 to 9 1/4" diameter. Your primary is a CV-tech. It is probably 7 to 7 1/4" diameter and I suspect these clutches were there with the previous motor, and will work fine together. I'm guessing you just replaced the motor? This would have changed the center to center measurement of the clutches.....if you can, adjust the motor for proper belt deflection. If you can't move the motor any more, you will need a new belt. To figure that out, You would need to measure yours and then figure out how far you need to move your motor. Belt length now (assuming too big) minus the distance motor needs to move times 2 = new belt length.... Lets say your belt is 46" and the motor needs to move 1"....46-1, -1= 44" new belt.

[Tomo]

hi ,
Are the two clutches compatable?????????
Recreatives Industries did mix clutch brands at one stage although I donot no of the models
Others may have the experience .
The golden rule is that An engineer works out the CLUTCH SYSTEM -------drive & driven & BELT
If u change this it may or may not work
Also as belts move in there clutches the belt can change angle
Therefore static alignment is not always inline between drive and driven

tomo

[ARGOJIM]

900HK (Kohler 440 2 stroke)? If you removed a 2 stroke engine and replaced it with a 4 stroke engine you will probably need a new spring in the driven clutch ( be it green or red, red will give most bottom end).

[Tomo]

hi,
If everthing checks out properly
u need to verify helix angle on the secondary first . A change in the angle will give far greater results than just a spring change ,the spring is only a fine tune .

A max runs runs 780 series drive and 780 driven on 23hp and under
clutch specs are 28 degree helix red spring ,overall gear ratio is t20 15teeth /34 axle .
Best person to speak to is
Quality drive systems google contact
[u will need a few measurements etc ]

tomo

[suntiet]

You have a comet secondary (measure the diameter for the series), probably a 780 @ approx 9 to 9 1/4" diameter. Your primary is a CV-tech. It is probably 7 to 7 1/4" diameter and I suspect these clutches were there with the previous motor, and will work fine together. I'm guessing you just replaced the motor? This would have changed the center to center measurement of the clutches.....if you can, adjust the motor for proper belt deflection. If you can't move the motor any more, you will need a new belt. To figure that out, You would need to measure yours and then figure out how far you need to move your motor. Belt length now (assuming too big) minus the distance motor needs to move times 2 = new belt length.... Lets say your belt is 46" and the motor needs to move 1"....46-1, -1= 44" new belt.

That is the sizes of my clutches. I'm not sure where it came from, this motor setup was in it when I bought it. I can adjust the motor a little but from what I here the belt should be a little wider so it sits high in the driven clutch? I found a local salvage shop that will sell me some used belts cheap so I can try one a little wider and maybe a little smaller. Where do I get this red spring I'm reading about?

Thanks everyone. I'll let you know how it works out

[thebuggyman1]

The belt width is NOT your problem. Yes it is probably worn and in need of replacement, but it isn't all that bad. Typical belt width is 1 3/16", and going to a 1 1/4" usually helps out the low end a little by making it sit higher in the secondary (the 1/16 to 1/8" above).
The used belts you are looking at may be good for experimental purposes, but the soft rubber of a new belt will give better performance....rubber hardens with age and wont grip the clutches as well.
Dayco belt #'s with dimensions: ATV and Snowmobile Belts - by Dayco

And a good place to buy them: HP2031 - Dayco High Performance Utility Vehicle Belt. Fits John Deere Gator HPX 2x4/4x4, Trail Gator HPX 2x4/4x4 | ATV Parts | MFG Supply

[suntiet]

thanks for the info, I was just going to experiment with the used belts for sizing. then go buy a new belt.

[Tomo]

hi
if u ring quality drive systems the people there will give u great correct advice and give u exactly the belt u need for the clutch combo u r using . U will also need the clutch cen to cen distance .

tomo