2020 Mci D4520 technical service bulletins

15 technical service bulletins and manufacturer communications cover the 2020 Mci D4520.

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

Aug 11, 2026 Service bulletinThis bulletin is to provide instructions for clearing DTC 1067 FMI 7 (Pressure Sensor Not Calibrated) and...
Jun 11, 2026 Service bulletinThis bulletin introduces an optional product improvement to the A/C compressor drive system for coaches...
May 6, 2026 Service bulletinThis TSIB provides information to provide a software update
Feb 9, 2026 Service bulletinThis TSIB is to inform customers the recommended steering axle cleaning/greasing instructions to prevent...
Nov 5, 2024 Service bulletinInformation to owners showing the proper procedure for checking the oil level in a BITZER HVAC compressor.
May 3, 2022 Service bulletinTechnical Service Information Bulletin describing the retrofit for the front junction box cover on...
Apr 1, 2022 Service bulletinThis Technical Service Information Bulletin is a supplemental reminder to all MCI owners/operators of...
Apr 1, 2022 Service bulletinThis Technical Instruction is a description of the inspections and cleaning procedures being recommended...
Mar 17, 2022 Service bulletinThis Instruction to Service (ITS) is a description of the inspections being recommedned by MCI due to the...
Feb 4, 2022 Service bulletinThis is an upgrade to Technical Service Information Bulletin TSIB 21-10 issued in January of 2022 which is...
Jan 5, 2022 Service bulletinThis Technical Service Information Bulletin describes interim inspection procedures required every 6000...
Dec 14, 2021 Service bulletinThis Technical Service Information Bulletin (TSIB) describes an update from Meritor for the bolt torque...
Oct 6, 2021 Service bulletinTechnical Service Information Bulletin describing an update to the Preventaive Maintenance requirements...
Jun 2, 2021 Service bulletinThis Technical Sevice Information Bulletion is to advise of a part number supersession of the coolant hump...
Mar 24, 2021 Service bulletinTechnical instruction describing how to replace the plastic fuel tank filler neck gasket.

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