# Service bulletin SC\-334

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10032312
- Published by NHTSA: 2010\-03\-04
- Manufacturer's number: SC\-334
- Manufacturer's date: 2008\-01\-11
- NHTSA component: SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE

## NHTSA's summary

MACK TRUCK: IT HAS BEEN DETERMINED THAT THE 90 DEGREE SINGLE CHECK VALVE FITTING MANUFACTURED BY PARKER HANNIFIN CORP. WHICH IS USED IN THE SUPPLY PORT OF THE SPRING BRAKE MODULATING RELAY VALVE \(BENDIX SR 7 VALVE\) MAY HAVE A DEFECT WHEREBY THE VALVE BODY RETAINER MAY BECOME EXCESSIVELY WORN AND EVENTUALLY BREAK APART. MODELS CXU, CXP, CXN, CHU, CHN, GU, CTP, CT, CV, MRU, AND LEU. 1/1/04\-11/3/05 AND 5/2/07\-7/26/07. \*PE

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Brakes

## Vehicles listed

- 2004 to 2005 MACK CHN
- 2007 MACK CHN
- 2007 MACK CHU
- 2004 to 2005 MACK CT
- 2007 MACK CT
- 2007 MACK CTP
- 2004 to 2005 MACK CV
- 2007 MACK CV
- 2004 to 2005 MACK CXN
- 2007 MACK CXN
- 2007 MACK CXP
- 2007 MACK CXU
- 2007 MACK GU
- 2007 MACK LEU
- 2007 MACK MRU

## Recalls for the same vehicles and component

- [2007278](/recalls/tc/2007278.md), 2007-08-28: Brakes
- [07V361000](/recalls/nhtsa/07V361000.md), 2007-08-15: SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE
- [07V360000](/recalls/nhtsa/07V360000.md), 2007-08-15: PARKING BRAKE
- [2007265](/recalls/tc/2007265.md), 2007-08-14: Brakes
- [2007264](/recalls/tc/2007264.md), 2007-08-14: Brakes
- [06V367000](/recalls/nhtsa/06V367000.md), 2006-09-26: SERVICE BRAKES, AIR
- [2006231](/recalls/tc/2006231.md), 2006-09-19: Brakes
- [06V271000](/recalls/nhtsa/06V271000.md), 2006-07-26: SERVICE BRAKES, AIR
- [2006180](/recalls/tc/2006180.md), 2006-07-17: Brakes
- [06V232000](/recalls/nhtsa/06V232000.md), 2006-06-28: PARKING BRAKE:CONVENTIONAL:AIR

## Other bulletins for the same vehicles and component

- [CBR 407 072025](/bulletins/11021333.md), 2025-08-04, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM. CBR \- To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.
- [CBR\-407 202409](/bulletins/11008366.md), 2024-10-03, Service bulletin: SERVICE BRAKES. CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded.
- [KC\-593](/bulletins/10210987.md), 2022-05-05, Service bulletin: EQUIPMENT; SERVICE BRAKES, AIR. V\-MAC \- ABS Malfunction Lamp On \- \( Eaton ABS Active Code 17\-10 / Arvin Meritor Wabco Active Code 7\-4 \)

JSON: [/v1/bulletins/10032312](/v1/bulletins/10032312)

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