[A/S] Frame reinforcement Bulltetin 29

[Roy Lashway <rlashway@xxxxxxxxxx>]

Bulletin Number:	29 			Product Line:___Trailer
Subject:	Main Frame Rciriforcenwflt
Attention:___Service Manager
Service Bulletin	

A main frame rail reinforcing plate (illustration attached) has been 
developed by Airstream to be used on broken or bent frames.

The reinforcement plates are designed with sufficient strength to become the 
main supporting structure in the area of the axle mounting plate, The 
general design has been used on production units since 1982. The plates are 
prenotched and drilled to clear the axles, axle mounting bolts and shock 
mounting  studs . Each plate is pre‹drilled for the bolts to be used to 
attach the reinforcingplate to the axle mounting plate and main frame. 
Always reinforce both frame rails The proper bolts are 3/8 inch  
grade five or better, with flanged-serrated heads and nuts.  In lieu of 
flanged heads, star washers may be used on both sides.  Proper torque for 
bolts is 34 ft. lbs.



PROCEDURES

1.	Support trailer on jack stands at each end so the main frame is 
level or slightly below level In the center.
2.	Remove strip of underbelly next to frame for access.
3.	Remove axles.
4.	Straighten any part of the frame or axle mountirng plate that would 
prohibit the reinforcing place from laying flat.
5.	Locate reinforcing plate over axle mounting bolt boles and shock 
mounting brackets.
6	Recheck levelness of frame. Drill holes for the 3/8 attaching bolts 
and torque to 34 ft. lbs. Note: Do not  drill holes oversize. They should be 
as snug as possible around bolts.
7.	Repair underbell and replce azlews.

On some trailers it will be necessary to remove water tanks and bleed the 
disc brake systems.

Part number 451120-01  (pair) is the roadside frame rail reinforcing plate
  and curbside frame rail reinforcing plate.



		


Roy Lashway
'78 Argosy,'56 Bubble
WBCCI 1610     VAC
rlashway@zianet.com
web site: www.zianet.com/rlashway
   (polishing report included)