Bus Conversion Magazine Bulletin Board
December 14, 2017, 12:14:49 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: If your computer is lost, damaged, or stolen, your Online mags will be safe.
   Home   Help Forum Rules Search Calendar Login Register BCM Home Page Contact BCM  
Pages: [1]   Go Down
  Print  
Author Topic: 4905 Vibrations  (Read 1096 times)
Rick Brown
Jr. Member
**
Offline Offline

Posts: 61




Ignore
« on: January 24, 2007, 08:12:02 AM »

My 4905 has a vibration between 30 and 50 mph when the engine is loaded (power or jakes).  The last time I had a vibration it was the pumpkin going out.  I was only a $880 tow job away from home when the cause revealed itself.  Now I feel the need for a better diagnosis tool than obvious failure.  How do people who know what they are doing diagnose on the road vibrations?
Thanks for any comments.
-Rick Brown in Reno, NV
Logged
TomC
Hero Member
*****
Offline Offline

Posts: 8470





Ignore
« Reply #1 on: January 24, 2007, 08:30:02 AM »

Depends on the type of vibration. Is it a low frequency vibration that corelates with the tire revolutions-then an out of balance tire.  Is it a vibration that get faster with the speed of the bus without regard to the engine speed-then axle gears or a U joint going out or out of balance drive shaft.  Does the vibration corelate with the engine speed-then out of balance something on the engine-usually the flywheel.  Give us an idea what the vibration is like.  Good Luck, TomC
Logged

Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
captain ron
Guest

« Reply #2 on: January 24, 2007, 08:54:23 AM »

I had a similar problem with my old 4905 and it was a loose bolt back on the bulkhead that was part of (if I remember correctly) the motor or transmission mount. Also the second day I had it it started vibrating bad and a bad u joint caused the drive shaft to come loose from the differential and the drive shaft got bound up and broke the tranny in half, yes in half. so check those two items.
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!