SI 3110
Service Bulletin Details
Public Details for: SI 3110
This service bulletin informs affected customers that they may experience water intrusion into the interior cavity of the front junction box compartment on model year 2012-2017 mci j4500 model coaches, and that an additional seal on the int
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Service Bulletin No. 3110 MODEL TYPE J4500 SUBJECT SECTION/GROUP Service Information DATE 3-Body Jan. 26, 2018 FRONT JUNCTION COMPARTMENT DOOR WATER INTRUSION CONDITIONS Description: Motor Coach Industries ("MCI") has become aware that some J4500 series coaches may experience water intrusion into the interior cavity of the front junction box compartment. Installation of an additional seal on the interior face of the door and a door stop will reduce the potential for water intrusion. This information is applicable to customers operating J4500 series coaches between the range of, and including, unit numbers 66068 to 68080. Parts Qty. New P/N Description 1 26-03-0125 Kit, Junction Box Water Intrusion and Door Stopper Kit Contents are: 1 03-31-4583 Seal 1 03-31-4584 Bracket, Stopper 1 03-31-4585 Bracket, Holder 2 19-01-1524 Capscrew 4 19-13-0320 Rivet 2 19-3-469 RivNut a/r Methacrylate, or, Devcon® 2 Ton® Epoxy, 31345, Syringe Service Information: 1. New parts will be available for service replacement. Service Procedure: Read this entire procedure before beginning work. Use Safe Shop Practices At All Times. 1. Turn the main battery disconnect switch to the OFF position. Service Bulletin No. 3110 Date Jan. 26, 2018 Page 2 2. Open the front junction compartment door. 3. Using a 50/50 mixture of isopropyl alcohol and water, clean the upper interior face of the front junction compartment door. Allow enough time for the mixture to flash off, prior to retrofit. 4. Carefully remove and discard the protective backing from the seal, p/n 03-31-4583. 5. Orient and route the seal on the interior face of the door per the dimensions provided in Figure 1. 2 1 3 5 4 Figure 1. Routing dimensions for seal. Item Figure 1 Description 1 2.0 inch 2 0.2 inch, typical 3 3.1 inch 4 2.3 inch 5 0.7 inch 6 2.0 inch 6 Service Bulletin No. 3110 Date Jan. 26, 2018 Page 3 To secure the bracket stopper to the fibreglass panel on the door in Step 6, either methacrylate or Devcon® 2 Ton® Epoxy with syringe can be utilized. 6. Orient and position the bracket stopper, p/n 03-31-4584,on the interior face of the door per the dimension provided in Figure 1/Item 6. Using a marker, mark the outline to assist in proper install location. Apply methacrylate or Devcon® 2 Ton® Epoxy to the back of the bracket stopper and orient with the marked outline, refer to Figure 2. Carefully secure in position until application cures. Figure 2. Bracket stopper mounting to interior face of door. 7. Position the bracket holder, 1.70 inches above the frame tube at the bottom of the junction box, as shown in Figure 3. 8. Using the existing slot holes in the bracket holder, use a marker to identify the drill hole positions on the frame tube. Using a 0.391 inch drill bit, drill holes in the two marked positions. 9. Orient and install the rivnuts, p/n 19-3-469, in the holes.Using capscrews, p/n 19-01-1524, secure the bracket holder to the tubing frame. Tighten to secure. Service Bulletin No. 3110 Date Jan. 26, 2018 Page 4 Utilize a drill bit guard set to a maximum depth of 0.250 inch when drilling into the interior face of the door, to prevent drilling through the complete door assembly. 10. Using the existing holes in the bracket stopper, drill four holes using a 0.20 inch drill bit and drill bit depth guard into the interior face of the door. 11. Orient and install the rivets, p/n 19-13-0320 in the holes to secure bracket stopper. 12. Open and close door to test alignment of the bracket stopper to the holder. Adjust capscrews on holder as required to achieve proper fitment and seal. 1.70 Figure 3. Service Bulletin No. 3110 Date Jan. 26, 2018 Figure 4. Retrofit completion. Procedure Complete. Page 5