FSB 258-013
Service Bulletin Details
Public Details for: FSB 258-013
Mack: combustion air valve and piping arrangement. On the leu and mru model vehicles it has been determined that there was insufficient support of the combustion air valve and piping. *js
- 2012 - 2011 - 2010 - 2009 - 2008 - 2007 -
Models from 2012
2012 MACK LEU |
2012 MACK MRU |
Models from 2011
2011 MACK LEU |
2011 MACK MRU |
Models from 2010
2010 MACK LEU |
2010 MACK MRU |
2010 MACK TERRAPRO (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 |
Field Service Bulletin Trucks Mack Trucks, Inc. Greensboro, NC USA SB-10043764-4950 This Bulletin replaces PV729–FSB 258–013_M, “Combustion Air Valve and Piping Arrangement (USA39481)” dated 01.2010. Date Group No. Release Page 2.2012 258 013 02 1( 3 ) Combustion Air Valve and Piping Arrangement FSB 258-013, Combustion Air Valve and Piping Arrangement LEU, MRU MP7 US07 February 2012 On the LEU and MRU model vehicles it has been determined that there was insufficient support of the combustion air valve and piping. Piping threads, are thus being stripped. A new clamp and mounting bracket has been designed and implemented in production in January 2009. The parts listed in this bulletin can be used to retrofit the EMCON valve support on older models to the current production level. Note: This bulletin does not apply to MACK Trucks Australia. W2071783 Required Parts Combustion Air Valve and Piping Arrangement Item QTY Part Number Description 1 1 85111052 Hose 2 1 25095595 P-Clamp 3 1 995451 Screw 4 1 21257163 Bracket 5 1 946544 Screw PV729-FSB 258-013_M USA52494 Mack Trucks, Inc. Field Service Bulletin Date 2.2012 Group No. Release 258 013 02 Combustion Air Valve and Piping Arrangement (Continued) 6 1 20706309 Nut 7 1 25091511 P-Clamp 8 1 21272511 Hose 9 2 25017363 Hose Clamp 10 3 N/A Existing Hardware Procedure You must read and understand the precautions and guidelines in Service Information, group 20, “General Safety Practices, Engine” before performing this procedure. If you are not properly trained and certified in this procedure, ask your supervisor for training before you perform it. 1 Disconnect all cables from the negative (ground) battery terminals to prevent personal injury from electrical shock and prevent damage to electrical components. 2 Raise cab. 3 Using coolant extractor/injector 85112740, drain coolant from cooling system. 4 Disconnect combustion air valve, remove Charge Air Cooling (CAC) outlet pipe, remove elbow from mixer. 5 Remove the fresh air inlet pipe between turbo and air filter housing. 6 Disconnect coolant lines from the transmission oil cooler pipe. 7 Remove clamps securing transmission oil cooler pipe to stand off bracket. 8 Remove hose clamp from lower end of cooler pipe that runs over the valve cover and move pipe to the side. 9 Remove the existing stand-off bracket mounted over the valve cover. 10 Install the new stand-off bracket (21257163) over the valve cover. 11 Position the auxiliary cooling pipe bracket. 12 Install transmission coolant pipe. 13 Secure pipe to stand off bracket. 14 Connect coolant lines to the transmission coolant pipe. 15 Install CAC pipe, connect combustion air valve hose. 16 Install fresh air pipe. 17 Using coolant extractor/injector 85112740, fill cooling system. 18 Lower Cab. 19 Reconnect all previously removed cables to the negative (ground) battery terminals. 20 Start engine and check for leaks. Page 2( 3 ) Mack Trucks, Inc. Field Service Bulletin Date 2.2012 Group No. Release 258 013 02 Reimbursement This repair may be eligible for reimbursement if a product failure was experienced within time and mileage limits of the applicable Warranty coverage. Reimbursement is obtained via the normal claim handling process. Claim Type (used only when uploading from the Dealer Bus. Sys.) W Labor Code Primary Labor Code 2352G-19–80 1.2 hrs. Causal Part 21257163 MACK Trucks Inc. engages in a continuous program of testing and evaluating to provide the best possible product. MACK Trucks Inc., however, is not committed to, or liable for updating existing chassis. Page 3( 3 )