This is the CXT HVAC service manual, publication S16034, for the Heat Ventilation Air Conditioning TXV system built March 2007 and later on International trucks. It covers system operation, components, diagnosis and troubleshooting, and R-134a service procedures.
Official document details
| Brand | International Trucks (Navistar) |
| Model coverage | 3200, 4100, 4300, 4400, 7300-7700, 8500, 8600, CXT, RXT |
| System / Group | CXT / HVAC |
| Publication no. | S16034 |
| Year / Revision | 04/23/2009 |
| Pages | 147 |
| File size | 4.4 MB |
| Format | |
| Language | English |
Inside the CXT HVAC service manual
- Safety precautions and general description
- System operational description and refrigerant flow
- Components: compressor, condenser, TXV, evaporator
- HVAC control panel and electrical system overview
- Diagnosis and troubleshooting tables
- R-134a evacuation, charging and oil fill guidelines
Copyrighted by Navistar in April 2009, the manual documents the mechanical side of the thermostatic-expansion-valve air conditioning system used from March 2007 and later, directing the reader to the applicable electrical circuit diagrams and troubleshooting guide for the electrical side. The operational description walks through general air distribution and the air-conditioning, heat, ventilation and defrost modes, along with refrigerant flow. Component coverage includes the compressor and clutch, condenser, pressure transducer, filter-drier, thermostatic expansion valve, evaporator, thermistors, heater core, blower assembly, Linear Power Module and control panel, with a detented control for seven blower speeds and fifteen temperature positions. Diagnosis begins with troubleshooting tables that require resolving and clearing HVAC diagnostic trouble codes first, and the R-134a service section details evacuation to 750 to 1000 microns, oil fill guidelines and correct charging.
Applicable truck models
The TXV system covers 3200, 4100, 4300, 4400, 7300, 7400, 7500, 7600, 7700, 8500, 8600, CXT and RXT models. After service the system vacuum should measure between 750 and 1000 microns before recharging with R-134a. Verify coverage against your VIN and build sheet on the International Trucks website.
Who needs the CXT HVAC service manual
HVAC technicians use this manual to interpret the compressor troubleshooting tables, replace the thermostatic expansion valve and evaporator, and correctly evacuate, oil-charge and recharge the R-134a system on International medium-duty trucks.
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