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Service Bulletin
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
XL-40 Converted Coach Shell (M)
Model Year: 1986 - 1990
XL-40 Converted Coach Shell (M)
Model Year: 1990 - 1993
XL-40 and XL-45E
Converted Coach Shell (M, ME)
Model Year: 1993 - 1994
XL-40 and XL-45E
Converted Coach Shell (M, ME)
Model Year: 1994 - 1995
XL-45 Converted Coach Shell (M5)
Model Year: 1993 - 1996
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.
VIN
2P9M33404G1001192 up to 2P9M3340XL1001580 incl.
2P9M33405L1001583 up to 2P9M33402P1001739 incl.
2P9E33497P1001741 up to 2P9M3340XR1001832 incl.
2P9M33404R1001857 up to 2P9E33493S1001521 incl.
2P9M3340XR1001832.
2P9M33498P1001646 up to 2P9M33490S1001519 incl.
2P9M33494S1001524 up to 2PCM3349XT1025774 incl.
96-14B / Page 1/18
96-14B
and
and
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Related Manuals for PREVOST PNEUMATIC SYSTEM IMPROVEMENT
Summary of Contents for PREVOST PNEUMATIC SYSTEM IMPROVEMENT
- Page 1 REVISION : VALVE ASSY. #131422 AND #131423 REPLACED BY #131460 IN KIT #141906, #141907 Date: SEPTEMBER 1996 Section: Subject: PNEUMATIC SYSTEM IMPROVEMENT Application: Model XL-40 Converted Coach Shell (M) 2P9M33404G1001192 up to 2P9M3340XL1001580 incl. Model Year: 1986 - 1990 XL-40 Converted Coach Shell (M) 2P9M33405L1001583 up to 2P9M33402P1001739 incl.
- Page 2 GENERAL WELDING PROCEDURE Warning: Park vehicle safely, apply parking brake, stop engine and set battery master switch(es) to the OFF position prior to working on the vehicle. 1. Welding must be done only by a qualified and experienced person. 2. Always wear the appropriate safety equipment. 3.
- Page 3 PROCEDURE Warning: Park vehicle safely, apply parking brake, stop engine and set battery master switch(es) to the OFF position prior to working on the vehicle. 1. Safely support vehicle at the axle jacking points. 2. Jack vehicle until the tire clears the ground, and place safety supports underneath body. Caution: Only the recommended jacking points must be used as outlined in Maintenance Manual Section 18, Body or in Operator’s Manual.
- Page 4 MATERIAL Kit # 141905 includes the following parts. Model 2P9M33405L1001583 up to 2P9M33402P1001739 incl. D140162 M, ME 2P9E33497P1001741 up to 2P9M3340XR1001832 incl. D140179 Part locations Part No. Description Fig. 1 641375 Elbow, 90 , 3/8 O.D. Tube x 3/8 NPT male item # 32, 33 Fig.
- Page 5 Kit #141906 includes the following parts. Model M, ME 2P9M33404R1001857 up to 2P9E33493S1001521 incl. D140196 2P9M3340XR1001832. Part locations Part No. Description Fig. 2 131384 Valve assy N.C. item # 31 Fig. 2 131460 Valve assy N.O. item 79 Fig. 2 131460 Valve assy N.O.
- Page 6 Fig. 9 504637 Cable Tie Note : Material can be obtained through regular channels. Kit #141907 includes the following parts. Model 2P9M33494S1001524 up to 2PCM3349XT1025774 incl. D140204 Part No. Description Part locations Fig. 3 131384 Valve assy N.C. item #61 Fig.
- Page 7 Fig. 9 064385 Wiring harness Fig. 9 561626 Fig. 9 561707 Relay Fig. 9 500557 Screw Fig. 9 504637 Cable Tie Note : Material can be obtained through regular channels. Kit #141908 includes the following parts. Model 2P9M33404G1001192 up to 2P9M3340XL1001580 incl. D140131 Part locations Part No.
- Page 8 Kit #141909 includes the following parts. Model 2P9M33498P1001646 up to 2P9M33490S1001519 incl. D140176 Part locations Part No. Description Fig. 5 501473 item #49 Fig. 5 641384 Straight fitting, 5/8 O.D. Tube x ½ NPT male item #49 Fig. 5 641371 Elbow 90º, ¼...
- Page 9 Fig. 9 561707 Relay Fig. 9 500557 Screw Fig. 9 504637 Cable Tie Note : Material can be obtained through regular channels. PROCEDURE Follow instructions on the vehicle's pneumatic diagram (Figure 1 to 5). Then, perform the following lift tag axle indicator lights modification.
- Page 10 FIGURE 2: PNEUMATIC DIAGRAM (REFERENCE DIAGRAM: D140196) 12095 96-14B / Page 10/18...
- Page 11 FIGURE 3: PNEUMATIC SYSTEM (REFERENCE DIAGRAM : D140204) 12096 96-14B / Page 11/18...
- Page 12 FIGURE 4: PNEUMATIC SYSTEM (REFERENCE DIAGRAM: D140131) 12097 96-14B / Page 12/18...
- Page 13 FIGURE 5: PNEUMATIC SYSTEM (REFERENCE DIAGRAM: D140176) 12098 INVERSION VALVE INSTALLATION 1. Before welding, refer to the general welding procedure in this service bulletin. 2. Locate the inversion valve bracket in rear wheelhousings (Fig. 6). At this position, a tee may be installed (on all vehicles except M5).
- Page 14 FIGURE 6: INVERSION VALVE BRACKET LOCATION 12099 FIGURE 7: INVERSION VALVE INSTALLATION (USED ON FIG. 1,3 & 5) 12100 96-14B / Page 14/18...
- Page 15 FIGURE 8: INVERSION VALVE INSTALLATION (USED ON FIG. 2) 12101 LIFT TAG AXLE INDICATOR LIGHTS MODIFICATION Because the logic behind the tag axle unloading and retracting has been changed, the lift tag axle indicator lights on the dashboard have to be reversed. Perform the following electrical procedure : Warning: Park vehicle safely, apply parking brake, stop engine and set battery master switch(es) to the OFF position prior to working on the vehicle.
- Page 16 FIGURE 9: FRONT ELECTRICAL COMPARTMENT 06187 96-14B / Page 16/18...
- Page 17 STEP 2 : HYDRAULIC TAG AXLE STABILIZER LOCKING SYSTEM MODIFICATION (M5 ONLY) (Fig. 10) Proceed to the following steps to increase the air springs filling delay to 15 seconds before the hydraulic tag axle stabilizer locking system application. Previous delay was set to 5 seconds. Note : Perform the following procedure only on M5 vehicles.
- Page 18 FIGURE 10: REAR ELECTRICAL COMPARTMENT 06188 96-14B / Page 18/18...