Some units without hand control valves have been built with a double check valve installed to the tpv
Mack technical service bulletin PI 0833 for 2014 Mack Gu, 2014 Mack Cxu and 2014 Mack Chu.
- Bulletin number
- PI 0833
- Component
- Electrical system: integrated trailer brake control
- Summary
- Some units without hand control valves have been built with a double check valve installed to the tpv. This is a misbuild and the double check valve needs to be removed for proper operation of the trailer brake system.
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