Paccar MX 321 T
Built: 2012-2012 · Series: MX
More machines from model year 2012
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Paccar MX-13 — the 12.9-Litre Six from the DAF/Paccar Partnership – inline six-cylinder turbodiesel, MX-family output band roughly 330 to 390 kW, for DAF CF/XF/XG and the Kenworth T680 and Peterbilt
The Paccar MX-13 is an inline six-cylinder turbodiesel of 12.9 litres. It descends from the European DAF-developed MX-11, which originally powered the DAF CF and XF ranges; in 2010 Paccar introduced its own MX-13 variant for the North American market. The MX family also includes the smaller, 10.8-litre MX-11.
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Vehicle spec sheets quote an output band of roughly 330 to 390 kW across the MX family as a whole; the sources reviewed do not give exact production dates or power ratings for the individual variants on record (MX 280 T, 300 T, 320 T, 321 T, 340 T, 360 T).
In North America the MX-13 has been available for the Kenworth T680 and Peterbilt from 2016; in Europe the MX family powers the DAF CF, XF and XG ranges.
Unlike many North American competitors with replaceable wet cylinder liners, the MX family uses a one-piece engine block with cylinder bores machined directly into it, without separate liners; this increases block rigidity but means a more involved repair in case of damage than the simple liner swap possible on wet-liner engines. To meet the strict North American NOx limits, the family combines turbocharging with charge-air cooling and an aftertreatment system of EGR, particulate filter and SCR catalyst with AdBlue dosing.
Because the MX-13 is built to different emission stages across North America and Europe, checking that the exhaust aftertreatment (EGR, SCR, diesel particulate filter) matches the rated stage — and its service history — is the key point for a used unit; no further type-specific weak points are documented in the sources reviewed.
Sources: Kennwerte der Modelle PACCAR MX, PACCAR (Hersteller)
Technical data
Engine
| Engine family | CPCRH12.9M01correct |
|---|---|
| Engine families | CPCRH12.9M01correct |
| Fuel | dieselcorrect |
| Rated output | 431 bhpcorrect |
| Rated speed | 1,900 rpmcorrect |
| Maximum torque | 1,750 ft·lbfcorrect |
| Speed at max. torque | 1,280 rpmcorrect |
| Operating cycle | dieselcorrect |
| Injection | electronic direct injectioncorrect |
| Aspiration | single-stage turbocorrect |
Origin and approval
| Built from | 2012correct |
|---|---|
| Built to | 2012correct |
| Model year from | 2012correct |
| Model year to | 2012correct |
Other data
| Anwendungsbereich | HHDDcorrect |
|---|
Frequently asked questions
How much power does the Paccar MX 321 T have?
The Paccar MX 321 T delivers 431 kW.
When was the Paccar MX 321 T built?
Production years: 2012.
What to check before buying
- Match the data plate against the order: frame size, mounting and rating have to agree.
- For used units, ask about winding condition and bearing play.
- Ask about parts availability for this series — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 17 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Other models in this series
Sources: [1]
Diesel engine in 3D section
Turn the model, look inside and click an assembly — each one is explained.