PREVOST PNEUMATIC SYSTEM IMPROVEMENT, Service Bulletin

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96-14B / Page 1/18
Service Bulletin 96-14B
REVISION : B
VALVE ASSY. #131422 AND #131423 REPLACED BY #131460 IN KIT #141906, #141907
Date: SEPTEMBER 1996
Section: 12
Subject: PNEUMATIC SYSTEM IMPROVEMENT
Application:
Model VIN
XL-40 Converted Coach Shell (M)
Model Year: 1986 - 1990
2P9M33404G1001192 up to 2P9M3340XL1001580 incl.
XL-40 Converted Coach Shell (M)
Model Year: 1990 - 1993
2P9M33405L1001583 up to 2P9M33402P1001739 incl.
XL-40 and XL-45E
Converted Coach Shell (M, ME)
Model Year: 1993 - 1994
2P9E33497P1001741 up to 2P9M3340XR1001832 incl.
XL-40 and XL-45E
Converted Coach Shell (M, ME)
Model Year: 1994 - 1995
2P9M33404R1001857 up to 2P9E33493S1001521 incl.
and
2P9M3340XR1001832.
XL-45 Converted Coach Shell ( M5)
Model Year: 1993 - 1996
2P9M33498P1001646 up to 2P9M33490S1001519 incl.
and
2P9M33494S1001524 up to 2PCM3349XT1025774 incl.
DESCRIPTION
On the above-mentioned vehicles, it is possible to improve the airtightness of the vehicle's pneumatic
system. This service bulletin upgrades the pneumatic system in accordance with our current line
specifications.
Note
: The existing pneumatic system is safe and this bulletin should be considered as product
improvement instructions.
Modifications are :
♦
The logic behind the tag axle unloading and retracting (STEP 1);
♦
The increase of the tag axle air springs filling delay before the hydraulic tag axle stabilizer locking (this
modification is applicable only on Mirage M5 vehicles) (STEP 2).
There are kits (materials) at the beginning of step 1. Depending on the vehicle model and VIN, select and
order the appropriate one. There is also a resistor to order (step 2) (only for M5 vehicles).
Proceed as follows to perform modifications.
Before welding is done on the vehicle (Fig. 6), read carefully the general welding procedure.