TSIB 22-04
Service Bulletin Details
Public Details for: TSIB 22-04
Instructions to improve sealing in the front junction box.
- 2023 - 2022 - 2021 - 2020 - 2019 - 2018 - 2017 - 2016 -
Models from 2023
| 2023 MCI J3500 |
| 2023 MCI J4500 |
Models from 2022
| 2022 MCI J3500 |
| 2022 MCI J4500 |
Models from 2021
| 2021 MCI J3500 |
| 2021 MCI J4500 |
Models from 2020
| 2020 MCI J3500 |
| 2020 MCI J4500 |
Models from 2019
| 2019 MCI J3500 |
| 2019 MCI J4500 |
Models from 2018
| 2018 MCI J4500 |
Models from 2017
| 2017 MCI J4500 |
Models from 2016
| 2016 MCI J4500 |
TECHNICAL SERVICES INFORMATION BULLETIN TSIB 22-04 Rev B July 18, 2023 TO: All Operators TITLE: Front Junction Box Cover Retrofit All MCI J4500, and J3500 coaches equipped with Power Distribution Panel (PDP) APPLICABILITY: in front junction box Read this entire procedure before beginning work. Use Safe Shop Practices at All Times. To avoid personal injury: a. Proper Personal Protective Equipment (PPE) must be worn. Safety glasses and protective gloves are required for working with DEF Fluid. b. Turn the main battery disconnect switch to the OFF position. c. Ensure that both the front and the rear wheels are chocked. d. Position the ENGINE RUN and ENGINE START switches on the engine compartment remote control box to the OFF position. e. Allow enough time for components to cool down prior to working in the engine compartment. _________________________________________________________________________________________________________________ TSIB 22-04 Rev B Page 1 of 4 July 18, 2023 1.0 Description This TSIB is issued to address the issue of water ingress into the front junction box area from the door. Follow the steps in this TSIB to install a cover that protects the circuits on the front junction box panel from water ingress. 2.0 Material Requirements MCI kit, P/N: 6495486, consists of the following parts: Item 1 2 3 4 5 3.0 Part Number 959748 959998 960199 19-1-655 117202 QTY 1 1 6 3 2 U/M EA EA EA EA FT Description Cover-Front Junction Box Trim Lock w/ bulb seal Bracket-FJB cover Screw - Pan Head, 10-24 X ½ Tubing-Heatshrink .75BL Special Tools N/A 4.0 Rework Instructions Open front junction box door. Remove and save the three screws securing the panel on top of the front junction box area. Remove and save the screws _________________________________________________________________________________________________________________ TSIB 22-04 Rev B Page 2 of 4 July 18, 2023 Install heat shrink, MCI P/N: 117202, on all six brackets, MCI P/N: 960199, as shown below. Install heat shrink on the brackets Install three brackets, MCI P/N: 960199, at the three holes using existing screws such that the longer face of the bracket is towards the back of the front junction box. Install brackets, 960199, using existing screws Mark three locations on the bottom of the front junction box panel at the dimensions shown below. Mark three holes 0.25 _________________________________________________________________________________________________________________ TSIB 22-04 Rev B Page 3 of 4 July 18, 2023 Install three brackets, MCI P/N: 960199, at the three marked locations using tapping screws, MCI P/N: 191-655, such that the taller face of the bracket is facing towards the front junction box. Install brackets, 960199, using 19-1-655 screws Install bulb seal, MCI P/N: 959998, around the top, bottom and cutout edges of the cover, MCI P/N: 959748. Install trimlock w/ bulb seal around the panel Slide the modified cover into the brackets to seal the FJB. Slide the modified cover in the brackets If you have questions or need further assistance, please contact MCI Technical Call Center @ 1800-241-2947. _________________________________________________________________________________________________________________ TSIB 22-04 Rev B Page 4 of 4 July 18, 2023