Register free!
Search
 
     

The Green Industry's Resource Center


Click for Weather
Reply
 
Thread Tools Display Modes
  #1  
Old 06-01-2005, 08:09 PM
hillndale's Avatar
hillndale hillndale is offline
LawnSite Member
 
Join Date: Aug 2004
Location: Maine
Posts: 214
PSI - Go by Manual or what's on tire?

I assume you go by the Manual, but thought I'd ask -- I have a new Scag Z Cat and thought I better check the tire pressure since reading how much tire pressure effects cut and handling. Well they are set closer to what's on the tires. The manual says 12PSI in drive wheels and 25PSI in castors. On the tires it says: drive tires 24PSI max and castors say 46PSI max. So the manual is calling for roughly half what the tire manufacturer is saying. Could someone please enlighten me. Many Thanks

hillndale
Reply With Quote
  #2  
Old 06-01-2005, 08:11 PM
Grass Masters Grass Masters is offline
LawnSite Member
 
Join Date: Jan 2005
Location: NC
Posts: 85
GO by what is on the tire because the maunal was written for the tires taht was placed on any unit at the factory.

The tires you buy may or may not meet the same standards as the ones that were at the factory..

What does it say about min.
Reply With Quote
  #3  
Old 06-01-2005, 08:27 PM
hillndale's Avatar
hillndale hillndale is offline
LawnSite Member
 
Join Date: Aug 2004
Location: Maine
Posts: 214
Quote:
Originally Posted by Grass Masters
GO by what is on the tire because the maunal was written for the tires taht was placed on any unit at the factory.

The tires you buy may or may not meet the same standards as the ones that were at the factory..

What does it say about min.
It doesn't mention minimum. The tires on the machine came with the machine. Are you saying the manual isn't model specific?
Reply With Quote
  #4  
Old 06-01-2005, 08:39 PM
LightningLawns's Avatar
LightningLawns LightningLawns is offline
LawnSite Senior Member
 
Join Date: Jan 2005
Location: Cocoa, Florida
Posts: 279
max psi is just the maximum that the manufacturer of the tire recommends you can put as little as you want just don't exceed the max. Go with what the manual says otherwise your cut height might be off.
__________________
www.lightninglawnservice.com
Reply With Quote
  #5  
Old 06-01-2005, 08:48 PM
riches139's Avatar
riches139 riches139 is offline
LawnSite Senior Member
 
Join Date: Aug 2003
Location: Hartville,Ohio
Posts: 369
The high pressure on the tire is to seat it to the rim during the manufacturing process.

They usually come overinflated unless the dealer did his job and adjusted them.

You'll find that 24# in rear and 46# in front will make it ride like a rock.
__________________
Cub M60 Tank
Wright Stander 36" RH
Cub G1336 WB w/sulky
Cub 21"
Lawnboy 21"
Cub trimmers
Cub hedge trimmer
Cub chain saw
Poulan chain saw
Stihl hedge trimmer
Kawasaki blower
Homelite handheld
Southwest 7x16 Enclosed
"04" F150 5.4 8' bed
Assorted other moneymakers
Porti Potty (very important)
Reply With Quote
  #6  
Old 06-01-2005, 08:49 PM
topsites topsites is offline
LawnSite Fanatic
 
Join Date: Mar 2005
Location: Richmond Virginia
Posts: 21,677
Quote:
Originally Posted by Grass Masters
GO by what is on the tire because the maunal was written for the tires taht was placed on any unit at the factory.

The tires you buy may or may not meet the same standards as the ones that were at the factory..
I always go by what's on the tire, too.

Far as cut-height, not only should this be influenced little to none, but I check this from time to time, in my case when the WB sits on a level surface, the blades are 4 fingers from the ground. Since both my Wb's are the same model and make, both are set to the same height - So if one should actually break down in the middle of a yard, I can come back with the other and finish it without any problems.

50 psi is what I have in the front, 30 in the rear (for my fixdeck WB). That way when I hit a bump, low tire air-pressure doesn't act like a shock absorber, causing the deck to 'sink' towards the turf and creating a nasty scalp. That, and it rules when curb-jumping.
Reply With Quote
  #7  
Old 06-01-2005, 08:50 PM
Oldtimer Oldtimer is offline
LawnSite Bronze Member
 
Join Date: Apr 2000
Location: Pensacola, Florida
Posts: 1,392
Over inflate mower tires and they could be ruined. They are not belted and will stretch.

Oldtimer
Reply With Quote
  #8  
Old 06-01-2005, 09:04 PM
hillndale's Avatar
hillndale hillndale is offline
LawnSite Member
 
Join Date: Aug 2004
Location: Maine
Posts: 214
2 for 2

Interesting and thanks -- I'm 2 for 2 -- some say follow manual and others go by what's on the tires. The drive wheels on my machine even have little stickers that say 12PSI. I'm currently at twice that.

It has just started drying out here, but my tires have been spinning a lot. I know lowering the pressure will lessen the bumpiness of the ride & I would think definatelt effect cutting heights. How does pressure effect impact on turf?

hillndale
Reply With Quote
  #9  
Old 06-01-2005, 09:24 PM
Precision Precision is offline
LawnSite Gold Member
 
Join Date: Feb 2004
Location: Cocoa Florida
Posts: 3,021
less tire pressure gives more grip

More tire pressure gives more height and more speed

Tire pressure should be run on the softer side to create less wear on the turf, less damage to the machine/driver and to create a larger contact patch.

If the manual says 12psi try it there and see how she runs. Different types of tires require different amounts of pressure. The bald from the factory castors with really thick walls typically require much less than thin treaded tires to maintain shape.

Unless you own a Ferris you tires are the only shock absorber you have.
__________________
If you don't know your costs, you can't bid right. If you don't bid right, you can't make money, If you can't make money, become a Wal-mart greeter.
Reply With Quote
  #10  
Old 06-01-2005, 09:33 PM
hillndale's Avatar
hillndale hillndale is offline
LawnSite Member
 
Join Date: Aug 2004
Location: Maine
Posts: 214
Quote:
Originally Posted by Precision
less tire pressure gives more grip

More tire pressure gives more height and more speed

Tire pressure should be run on the softer side to create less wear on the turf, less damage to the machine/driver and to create a larger contact patch.

If the manual says 12psi try it there and see how she runs. Different types of tires require different amounts of pressure. The bald from the factory castors with really thick walls typically require much less than thin treaded tires to maintain shape.

Unless you own a Ferris you tires are the only shock absorber you have.
Thanks very much Precision -- I noticed I've been spinning my wheels (so to speak) a lot, even backing up trailer ramp. I thought something was wrong. Though you say softer tires create less wear, I would think the opposite, but I totally trust your expertise & will set the tires to the "manual specs" & see what the response is. Thanks again

hillndale
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump





Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 05:59 AM.

Page generated in 0.12285 seconds with 7 queries