FSB 386-011
Service Bulletin Details
Public Details for: FSB 386-011
Air pressure switch, replacement
- 2020 - 2019 - 2018 - 2017 - 2016 - 2015 - 2014 - 2013 - 2012 - 2011 - 2010 - 2009 - 2008 - 2007 -
Models from 2020
| 2020 MACK LR |
| 2020 MACK TERRAPRO (TE) |
Models from 2019
| 2019 MACK LR |
| 2019 MACK TERRAPRO (TE) |
Models from 2018
| 2018 MACK LR |
| 2018 MACK MRU |
| 2018 MACK TERRAPRO (TE) |
Models from 2016
| 2016 MACK LEU |
| 2016 MACK LR |
| 2016 MACK MRU |
Models from 2015
| 2015 MACK LEU |
| 2015 MACK LR |
| 2015 MACK MRU |
Models from 2014
| 2014 MACK LEU |
| 2014 MACK LR |
| 2014 MACK MRU |
Models from 2013
| 2013 MACK LEU |
| 2013 MACK LR |
| 2013 MACK MRU |
Models from 2012
| 2012 MACK LEU |
| 2012 MACK LR |
| 2012 MACK MRU |
Models from 2011
| 2011 MACK LEU |
| 2011 MACK LR |
| 2011 MACK MRU |
Models from 2009
| 2009 MACK LEU |
| 2009 MACK MRU |
| 2009 MACK TERRAPRO (MRU) |
Models from 2008
| 2008 MACK LEU |
| 2008 MACK MRU |
| 2008 MACK TERRAPRO (MRU) |
Models from 2007
| 2007 MACK LEU |
| 2007 MACK MRU |
Mack Trucks Greensboro, NC USA Field Service Bulletin Trucks Date Group No. Release Page 3.2020 386 011 01 1(10) Air Pressure Switch, Replacement LEU, MRU, TE, LR FSB 386-011, Air Pressure Switch, Replacement (March 2020) On certain Mack Trucks, models LEU, MRU, LR and TE built from September 25th, 2006 until March 9th, 2020, the truck may be equipped with an air pressure switch 25171211 or 21410087 that is prone to premature failure. A replacement switch has been introduced, Volvo part number 23721213. This switch is physically different from 25171211 or 21410087. 25171211 or 21410087 has a push to fit connector, 23721213 has a threaded connector. To replace switch 25171211 or 21410087 with switch 23721213, follow the procedure outlined in this Field Service Bulletin. PV729-FSB386-011_M USA150771137 Mack Trucks Field Service Bulletin Date 3.2020 Group No. Release 386 011 01 Required Parts Part Description Air pressure switch Air pressure switch Fitting (Reducer) Manifold port with 1/ 8” NPT Manifold port with 1/ 4” NPT Part Number Quantity 23721213 1 23721213 1 25091719 1 Decommissioning the Truck for Repair You must read and understand the precautions and guidelines in Service Information, group 30, "General Safety Practices, Electrical" before performing this procedure. If you are not properly trained and certified in this procedure, ask your supervisor for training before you perform it. NOTE: Information is subject to change without notice. Illustrations are used for reference only and can differ slightly from the actual vehicle being serviced. However, key components addressed in this information are represented as accurately as possible. 1 Park the vehicle on a flat and level surface. 2 Apply the parking brake. 3 Place the gear lever in neutral. 4 Install the wheel chocks. W7086748 5 Disconnect the cable from the battery’s negative terminal. Page 2(10) Mack Trucks Field Service Bulletin Date 3.2020 Group No. Release 386 011 01 W3086747 Air pressure switch, replace 1 Remove the screws. T3157266 2 Remove the panel. Page 3(10) Mack Trucks Field Service Bulletin Date 3.2020 Group No. Release 386 011 01 T3157267 3 Remove the connectors. T3157363 4 Remove the switch. 5 Remove the fitting. Page 4(10) Mack Trucks Field Service Bulletin Date 3.2020 Group No. Release 386 011 01 T3157268 Page 5(10) Mack Trucks Field Service Bulletin Date 3.2020 Group No. Release 386 011 01 Air pressure switch Installation Required parts. Part Description Air pressure switch Air pressure switch Fitting (Reducer) Manifold port with 1/ 8” NPT Manifold port with 1/ 4” NPT Part Number Quantity 23721213 1 23721213 1 25091719 1 Condition: If the manifold port has the 1/8” NPT, perform the below procedure. 1 Install the switch. Note: The switch should be installed hand tight, then tightened 2 to 3 turns for a leak tight seal. T3157364 Condition: If the manifold port has the 1/4” NPT, perform the below procedure. 2 Install the fitting. Note: The fitting should be installed hand tight, then tightened 2 to 3 turns for a leak tight seal. 3 Install the switch. Page 6(10) Mack Trucks Field Service Bulletin Date 3.2020 Group No. Release 386 011 01 T3157365 4 Install the connectors. T3157366 5 Install the panel. Page 7(10) Mack Trucks Field Service Bulletin Date 3.2020 Group No. Release 386 011 01 T3157267 6 Install the screws. 7 Torque tighten the screws (M4) 1.5±0.5 Nm (13.3±4.4 ft-lb). T3157266 Commissioning the Truck for Operation 1 Connect the battery cable to negative (earth) terminal. Page 8(10) Mack Trucks Field Service Bulletin Date 3.2020 Group No. Release 386 011 01 W3086758 Page 9(10) Mack Trucks Field Service Bulletin Date 3.2020 Group No. Release 386 011 01 2 Remove the wheel chocks. W7086759 Reimbursement This repair is covered by an authorized Service Program. Reimbursement is obtained via the normal claim handling process. UCHP Reimbursement Claim Type (used only when uploading from the Dealer Bus. Sys.) 01 Labour Code Air pressure switch, replace 3864-03-09-01 0.4 hrs. Causal Part 25171211 21410087 MackTrucks North America reserves the right to make any changes in design or to make additions to or upon its products without incurring any obligations to install the same on vehicles previously built. Page 10(10)