Heymow - Lawnmower Racing Forum

Mower Building / Setup Help => Project Builds => Racing Mower Builds => Topic started by: mike h on November 09, 2008, 10:39:23 pm

Title: mikes idaho modified build
Post by: mike h on November 09, 2008, 10:39:23 pm
This winter I'm building a modified mower. The modified rules in the area are: 20 hp, no internal mods, mower transmissions 38" wide, 6" to the bottom of the frame, and must have j spindles.

I'm starting with a small wards mower, a 820 017 tranny and  kohler 18hp v twin.

(http://s433.photobucket.com/albums/qq59/sharonnmike/th_1104081644.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/1104081644.jpg)
this is the sheet metal

(http://s433.photobucket.com/albums/qq59/sharonnmike/th_1031081830.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/1031081830.jpg)
here's a side view of the tranny, jack shaft, motor, and front end-they are mocked in

(http://i433.photobucket.com/albums/qq59/sharonnmike/th_1107081857b.jpg) (http://i433.photobucket.com/albums/qq59/sharonnmike/1107081857b.jpg)
this is a front view of the spindles -they will be cut down and threaded
Title: Re: mikes idaho modified build
Post by: nic_hayes on November 09, 2008, 10:43:17 pm
Where are you located?
Title: Re: mikes idaho modified build
Post by: mowdak1 on November 09, 2008, 10:43:38 pm
See the thread on thumbnailing your images Mike... makes life simpler for those on dial-up. Getting it to Photobucket is the hard part, you simply grabbed the wrong code there. Last two three sections of the Tutorial will show you what to do there.
Title: Re: mikes idaho modified build
Post by: mike h on November 09, 2008, 10:53:22 pm
hayden lake idaho
Title: Re: mikes idaho modified build
Post by: mowdak1 on November 09, 2008, 10:57:38 pm
Forgot to include the link to that thread... Sorry about that!!

http://www.heymow.com/index.php?topic=2346.0
Title: Re: mikes idaho modified build
Post by: mike h on November 11, 2008, 01:10:43 am
thanks for the help
here is another photo I hope it's right
 
(http://i433.photobucket.com/albums/qq59/sharonnmike/th_1110081808.jpg) (http://i433.photobucket.com/albums/qq59/sharonnmike/1110081808.jpg)

I am  using a murry spindle with 5/8 shaft it will have a 2"  shaft above the bearing
is this OK (2" between the bearing and the drive gear) ?
Title: Re: mikes idaho modified build
Post by: mowdak1 on November 11, 2008, 01:57:44 am
Well.... actually no, it should look like the one above. Not sure where you're picking your code up in Photobucket Mike.

When you load the images, scroll down a little and check the little box beneath each picture you want to post. Then scroll to the bottom of the page, and there is a "Generate HTML and Image Code" button, way over on the right. Click that!

Then you want to go down to the box just below where it says... "IMG clickable thumbnails for message boards - recommended" and simply left click in the box to copy. Then come back here and paste it to your post.

In that fashion Photobucket generates the thumbnailed image to play here, allowing for much smaller file size, and thus easier page loads for those on dial-up. And, once you click on it, the image plays in full resolution, whatever size that may be.

 
 
Title: Re: mikes idaho modified build
Post by: Gary Elder on November 11, 2008, 02:11:03 am
I am  using a murry spindle with 5/8 shaft it will have a 2"  shaft above the bearing
is this OK (2" between the bearing and the drive gear) ?
if you mean the extra shaft sticking out past the sprocket from the jack shaft then that shouldn't hurt anything.

but how are you going to get the rear end narrow enough to be 38 inches wide with those fenders?
Title: Re: mikes idaho modified build
Post by: badboysracing on November 11, 2008, 08:07:07 am
WHat do you mean how will be be able to get it narrow enoguh. I am not no jenous but it looks close to 38 the way it sits.
Title: Re: mikes idaho modified build
Post by: Gary Elder on November 11, 2008, 04:21:24 pm
 i think with the tires on the outsides of the fenders it'd be over 38
Title: Re: mikes idaho modified build
Post by: mike h on November 12, 2008, 01:18:23 am
again i'm sorry on the photo thing and thank you for the help

and the fenders will be cut and moved so it will be 38'' wide  good observation!
Title: Re: mikes idaho modified build
Post by: mike h on November 20, 2008, 12:49:21 am
Here are some photos of the work I've done this week
(http://i433.photobucket.com/albums/qq59/sharonnmike/th_1117081912.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1117081912.jpg)

I've built a sub frame. It's tied into the upper steering column to stiffen the frame. The upper steering column will be tied to the foward frame near the front axel.

I planing to have the chassis functional with out the sheat metal on it so i can run it on the bench


  (http://i433.photobucket.com/albums/qq59/sharonnmike/th_1119081911.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1119081911.jpg)
(http://i433.photobucket.com/albums/qq59/sharonnmike/th_1117081858.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1117081858.jpg)



Title: Re: mikes idaho modified build
Post by: mike h on November 21, 2008, 12:12:18 am
Tonight I started on the running boards and peddles. I ran 2 pieces of 1" tubing under the frame from one side to the other.

(http://i433.photobucket.com/albums/qq59/sharonnmike/th_1120081919.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1120081919.jpg)

Here the tubes support the running board on the right side I used a MTD running boards that I bent the ends backwards and mounted them upside down. The brake pedal is an MTD made smaller.

 (http://i433.photobucket.com/albums/qq59/sharonnmike/th_1120081917a.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1120081917a.jpg)


(http://i433.photobucket.com/albums/qq59/sharonnmike/th_1119081911.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1119081911.jpg)

Title: Re: mikes idaho modified build
Post by: Old Goat on November 21, 2008, 02:46:53 pm
I see you have a chain from the jack shaft to the transaxle. You might be better off with a belt. Chains, especially small sizes like 35 or 40, dont like to be run on their side.
Title: Re: mikes idaho modified build
Post by: mike h on November 22, 2008, 10:04:00 pm
I see what you are saying but, the chain seems so positive of a connection.   What do you think of a glide "plastic" under the chain or a #50 chain

Last night I worked on the brakes.  Here is the brake pedal. The rod goes to a mechanical disk brake. 

 (http://i433.photobucket.com/albums/qq59/sharonnmike/th_1121081824.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1121081824.jpg)
Title: Re: mikes idaho modified build
Post by: mike h on December 06, 2008, 10:30:09 pm
I,ve been working under my rig.  Here is a photo of the clutch.

(http://i433.photobucket.com/albums/qq59/sharonnmike/th_1206081835-1.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1206081835-1.jpg)

This the front end


(http://i433.photobucket.com/albums/qq59/sharonnmike/th_1206081835c.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1206081835c.jpg)
Title: Re: mikes idaho modified build
Post by: Old Goat on December 08, 2008, 09:46:57 am
Are you going to weld the front axle to the frame?
 If you make a spacer out of a piece of pipe to fit snugly between your heim ends, then slide your L-spindles up through, both heim ends will support the weight instead of just the bottom one.
George (E.C. Distributing) makes a nice aluminum hub with high speed bearings that fit on 3/4" spindles. Then you can use front kart wheels. It's a lot stronger setup than the factory front wheels. We kept breaking the centers out of the stock wheels. We haven't had any trouble since we switched to the kart wheels.
Title: Re: mikes idaho modified build
Post by: low mow racing on December 08, 2008, 03:38:17 pm
i have been running a 35 chain on its side for two years and no problems.just keep it clean and lubed..
Title: Re: mikes idaho modified build
Post by: Wheelhorseracer on December 08, 2008, 03:55:47 pm
I ran a 60 inch #35 chain on it's side all of last year from my centrifugal clutch to the 90 box.. but I don't think I would run it all the time..

I don't think that spindle set up will last very long.. You have a shear point right under your spindle bolt and the bottom heim joint.. It will bend there or break...


Title: Re: mikes idaho modified build
Post by: redneckracer on December 08, 2008, 11:49:04 pm
I can't wait to race you on that thing Mike. I see the running boards and the Potlach guys had us change the rules to a sudo deck for running boards. Maybe you plan to make it look like a deck under your boards? Either way is fine.

I trid the chain thing on my jackshaft to transaxle and it blued the chain and burned it up in under a minute. I know guys are using it from engine to trans with no problem, but the jackshaft to trans axle turns faster and I couldn't get chain to hold up.
Title: Re: mikes idaho modified build
Post by: mike h on December 09, 2008, 12:12:27 am
 I will be making a spacer to go between the hiem joints. I've put bearings into the steel wheels and the  kart wheels will be later.  The axel will be welded in place.

As for a shear point I'm not clear where you mean. The L spindle is 3/4" rod. Tomorrow I'll get a better photo if you could point it out to me I would appreciate it.

Thanks for the help  
Rob, I am looking forward to racing you too. I will have deck stuff on it and the trans is a 820-017 so, I'm running 1to1 from the engine to trans 
Title: Re: mikes idaho modified build
Post by: mike h on December 09, 2008, 11:30:43 pm
Here is another photo of the front end.

(http://i4
33.photobucket.com/albums/qq59/sharonnmike/th_1209081835.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1209081835.jpg)

Wheelhorseracer remarked that it has a shear point. I believe it is where the plate is welded to the cross beam.
The plate is 2" wide by 1/4" thick and the beam is .095 by 1" by 1.5" and the hole for the hime joints are 3/4"

I think I will gusset it and weld it better.  Safety first.   
(http://i433.photobucket.com/albums/qq59/sharonnmike/th_1209081835.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=1209081835.jpg)
Title: Re: mikes idaho modified build
Post by: mike h on January 30, 2009, 12:34:22 am
Well, I've been working on my mower. I spent a lot of time on the front end and the more I worked on it and the more I read this site the worst it got .  So, after three attempts I called Mike at Acme Mower and bought one. I'm still waiting for it.  Mike has been a big help.

In the meantime I got a lot more finished. I will say the kolher engine, the  820 tranny and the small heavy tractor feels like a pig. It might be  because I have to drag it on and off the bench since the front end is not functional.

But, I'm happy. I started it and ran it through all the gears( just a bench test).  It work great. It was like starting a well maintained old grass cutter.

Here are some pictures.

     (http://i433.photobucket.com/albums/qq59/sharonnmike/th_0127091707.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=0127091707.jpg)

(http://i433.photobucket.com/albums/qq59/sharonnmike/th_0129091850a.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=0129091850a.jpg)

(http://i433.photobucket.com/albums/qq59/sharonnmike/th_0129091849.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=0129091849.jpg)

(http://i433.photobucket.com/albums/qq59/sharonnmike/th_0129091852.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=0129091852.jpg)

(http://i433.photobucket.com/albums/qq59/sharonnmike/th_0120091455.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=0120091455.jpg)

(http://i433.photobucket.com/albums/qq59/sharonnmike/th_0120091454d.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=0120091454d.jpg)

(http://i433.photobucket.com/albums/qq59/sharonnmike/th_0120091454c.jpg) (http://s433.photobucket.com/albums/qq59/sharonnmike/?action=view&current=0120091454c.jpg)