DEF heater line diag and repair

3 years ago
11
Cummins ISX ISM ISB 12 15 6.7 12 valve diesel coolant water

Found a defective DEF heater line on a 2022 Peterbilt 389. Video show diagnostics and replacement. Also DEF tank vent filter that was clogged causing tank to pressurize. Customer also asked me to adjust clutch, but it was self adjusting.

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