The ProStar cooling system service manual is the 109-page International radiator and cooling section, publication S12021, covering the complete cooling package on 2012 ProStar tractors. Issued by Navistar (EPA 07, August 2012), it gives removal, installation, coolant service and torque specifications for every cooling-package component.
Official document details
| Brand | International Trucks (Navistar) |
| Model coverage | ProStar (2012, EPA 07; US, Canada, Mexico) |
| System / Group | ProStar / Radiator & Cooling System |
| Publication no. | S12021 |
| Revision | Revision 1 (August 2012) |
| Pages | 109 |
| File size | 3.4 MB |
| Format | |
| Language | English |
What the ProStar cooling system manual covers
- Description of the deaeration tank, fan shroud, A/C condenser and radiator
- Transmission oil cooler, charge air cooler and low temperature radiator
- Fan drive and power steering oil cooler
- Coolant drain, pressure test and fill procedures, including MaxxForce 11 and 13 engines
- Removal and installation for deaeration and expansion tanks
- Radiator fan, fan belt, fan drive assembly and viscous fan drive
- Radiator hose, heat shrink clamps and a full torque chart
Coolant and torque specifications
The coolant fill procedure notes that a 50/50 mixture reaches a -34°F freeze point and a 53/47 mixture reaches -40°F, filled through the deaeration tank with both HTR and LTR air bleeds watched for coolant. The torque chart lists values such as 13 to 14 lbf-ft (18 to 19 N·m) for fan-shroud bolts and 65 to 79 lbf-ft for the radiator mount nut. Both charge-air-cooler and dual-radiator layouts are covered, each with its own removal and installation sequence.
Applicable truck models
The procedures apply to 2012 International ProStar tractors for US, Canada and Mexico, in both charge-air-cooler and dual-radiator configurations. Confirm engine and radiator build against the vehicle on the official International Trucks website before ordering parts. The optional MaxxForce 11 and 13 coolant drain and fill procedures are included for those engines.
Who needs this ProStar cooling system manual
Technicians replacing a radiator, fan drive or charge air cooler use this ProStar cooling system manual for the correct coolant fill procedure and torque values, avoiding air locks and leaks. The full PDF is available in the DiagTechPro manuals library, free account required to download.
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