Register free!
Search
 
     

The Green Industry's Resource Center


Click for Weather
Reply
 
Thread Tools Display Modes
  #11  
Old 07-03-2012, 09:25 PM
piston slapper's Avatar
piston slapper piston slapper is offline
LawnSite Platinum Member
 
Join Date: Mar 2010
Location: Tampa Fl
Posts: 4,027
Quote:
Originally Posted by OldLawnMowerMan81 View Post
BBC = blade brake clutch

~Ben
Thanx...I honestly didn't know what that meant....
The first day I worked in a mower shop....they started me on commercial mowers...and never looked back.....
Posted via Mobile Device
Reply With Quote
  #12  
Old 08-29-2012, 05:08 PM
OldLawnMowerMan81 OldLawnMowerMan81 is offline
LawnSite Member
 
Join Date: Jun 2008
Location: Milwaukie (Oak Grove), OR
Posts: 61
The next time my dad tinkers with the engine, this time I hope it will read 3000 RPM on the TinyTach (this without the BBC engaged). When I then engage the BBC, it should read 2850-2900 RPM.

To get a realistic idea of the actual blade tip speed of your mower with the BBC engaged, subtract at least 100 RPM from the manufacturer's stated no-load engine RPM.

For example, if a Honda GXV140 engine on a BBC-equipped HR215SXA mower is turning 3100 RPM without load, then when you engage the Roto-Stop (Honda's terminology for BBC), the engine RPM should then amount to up to 3000 RPM.

~Ben
Reply With Quote
  #13  
Old 08-29-2012, 05:32 PM
BigFish's Avatar
BigFish BigFish is offline
LawnSite Bronze Member
 
Join Date: Jul 2008
Location: chesapeake, va
Posts: 1,643
You, in fact, want to adj. the top rpm's with the blade rotating it's the only way to get an accurate reading.
The blades being engaged is not considered a load. It is a parasitic load, and should be accounted for when setting the top no load speed, which, by the way can be set to any rpm you want on your personal mower. I like to keep my unit at 3500 or so.

Blade tip speed/ rpm charts based on blade length/ cutting dia. are online.
__________________
" But let me tell you something ,folks: You can't fix stupid! There's not a pill you can take, there's not a class you can go to. Stupid is forever!"

......AMF!
Reply With Quote
  #14  
Old 09-02-2012, 04:36 PM
OldLawnMowerMan81 OldLawnMowerMan81 is offline
LawnSite Member
 
Join Date: Jun 2008
Location: Milwaukie (Oak Grove), OR
Posts: 61
Have you ever tried to determine the factory high speed setting by determining the overall tension of the spring?

Also, what kind of loaded (blade turning) and no-load (blade not turning) speeds do you get on your Toro TNT100?

~Ben
Reply With Quote
Reply

Tags
bbc , mower , speed , toro

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 06:04 PM.

Page generated in 0.05563 seconds with 7 queries