The Kenworth T6 HVAC manual (KM811250/PM820009) is the 2012 PACCAR HVAC Service Manual covering the heating and air conditioning system for T6 cab and sleeper applications. This 102-page document details the HFC134a (R134a) refrigerant system, PAG oil handling, heater core and evaporator service, and pressure-based troubleshooting.
Official document details
| Brand | Kenworth (PACCAR) |
| Model coverage | T6 series, cab and sleeper HVAC (Kenworth and Peterbilt applications) |
| System/Group | HVAC — heating, ventilation and air conditioning |
| Publication no. | KM811250/PM820009 |
| Year/Revision | 08/14/2012 |
| Pages | 102 |
| File size | 3.4 MB |
| Format | |
| Language | English |
Sections in this Kenworth T6 HVAC manual
- Safety, Applies To and Exploded View
- What’s New and General Information
- Special Tools and Specifications
- How It Works
- Maintenance
- Disassembly / Assembly
- Inspection
- Troubleshooting, Glossary and Index
System operation and coverage
The manual describes the heating cycle through the heater core, the R134a refrigeration cycle through the evaporator and expansion valve, cab and sleeper air filtration, and the heater-core bypass valve. Troubleshooting uses high-side and low-side pressure charts compared against ambient shop temperature, with measurements outside the shaded region flagged for further diagnosis. It specifies Sanden SP15 PAG oil, warns that the oil is hygroscopic and must stay sealed, and cautions against mixing R134a with R12 refrigerant or servicing equipment. The extract also notes the Kenworth-specific instrument-panel connecting bar that must be removed to reach the heater core, which Peterbilt applications do not have. Product information is available from the official Kenworth website.
Who needs this T6 HVAC manual
A/C technicians and fleet workshops servicing Kenworth T6 climate systems need this document for refrigerant handling precautions, pressure diagnostics and heater-core replacement steps. It also helps shops confirm correct system operation before and after a repair using the discharge and suction pressure charts.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
Applies to these truck models
This is the manufacturer document shared across 11 model families. It applies to:
- Kenworth T6
- Kenworth T700 T2000
- Kenworth T8
- Kenworth W9
- Peterbilt 365
- Peterbilt 384
- Peterbilt 386
- Peterbilt 388
- Peterbilt 389
- Peterbilt 579
- Peterbilt 587
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