OTR OTR57977000 Height Control Valve | Replaces 20QE4165AM DEF Black smoke / poor fuel

Black smoke / poor fuel economy from incorrect fuel-air calculation

7 diesel engines

and flows 135 CFM at 100 PSI

packaging the manifold absolute pressure (MAP) and intake-air temperature (IAT) signals in a single 4-pin rectangular sensor

OTR OTR57977000 Height Control Valve | Replaces 20QE4165AM DEF Black smoke / poor fuelAftermarket height control valve with integrated dump valve, designed as a direct replacement for Hendrickson 57977 000 on PRIMAAX EX, FIREMAAX EX, HAS, and HTB rear air suspensions. Includes the HCV mounting bracket, hardened washers, and locknuts to drop in for Mack and Volvo tractor air ride applications. Specifications Manufacturer OTR Part Number OTR57977000 Part Type Height Control Valve with Integrated Dump Includes Valve, mounting bracket,