JCB 448 TA4-129
Built: 2015-2023 · Series: Other models
More machines from model year 2015
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
JCB – other nonroad diesel engines: the collective page of the 444 and 448 ranges outside the named versions, model years 2011 to 2026, 55 to 129 kW, four-cylinder 4.4 and 4.8 litres
JCB (J C Bamford Excavators) of Rocester, Staffordshire, is one of the large British, still family-owned construction-equipment makers, fitting wheeled loaders, excavators and its own Loadall telehandlers with in-house-developed diesel engines. This page gathers the engines the register could not assign to a named version, with model years from 2011 to 2026 – a sign of the long, largely unchanged production run of the 444 and 448 engine family across numerous model years. The 444 and 448 designations correspond to the 4.4- and 4.8-litre four-cylinders, confirmed by the EPA codes 04.4 and 04.8.
Read on 3 more paragraphs
The register lists here 20 versions with 55 to 129 kW rated output at 2,050 to 2,200 rpm, from four-cylinders with 92 to 106 mm bore and 112 to 135 mm stroke. Maximum torque ranges from 327 to 690 Nm at 1,150 to 1,500 rpm. Among the emission stages, Tier 4 (Final or Phase-in) and Interim Tier 4 are balanced with 7 versions each, Tier 3 follows with 6; the turbocharger is mostly variable-geometry (14 of 20).
The 444 and 448 engines drive JCB's core range, from backhoe loaders through wheeled loaders to the Loadall telehandlers, and form the backbone of the maker's own drive technology in the mid power segment.
On a used purchase, operating hours and the service history of the injection system, the condition of the variable-geometry or waste-gate turbocharger, the tightness of the charge-air ducting, and on the newer Tier 4 Final versions the function of the exhaust aftertreatment matter; given the long production run, on older model years before 2015 the condition of the crankshaft seals is especially worth checking. Spares run through the JCB dealer network.
Sources: Kennwerte der Modelle JCB (weitere Nonroad-Dieselmotoren), JCB (Hersteller)
Technical data
Engine
| Engine code | D1Acorrect |
|---|---|
| Engine family | KJCBL04.8S12; GJCBL04.8S12; HJCBL04.8S12; LJCBL04.8S12; JJCBL04.8S12; MJCBL04.8S12; FJCBL04.8S12; NJCBL04.8S12correct |
| Engine families | KJCBL04.8S12; GJCBL04.8S12; HJCBL04.8S12; LJCBL04.8S12; JJCBL04.8S12; MJCBL04.8S12; FJCBL04.8S12; NJCBL04.8S12correct |
| Fuel | 7-15 ppm Ultra Low Sulfur Dieselcorrect |
| Rated output | 129 kWcorrect |
| Power band | 56<=kW<130correct |
| Rated speed | 2,050 rpmcorrect |
| Maximum torque | 690 N·mcorrect |
| Speed at max. torque | 1,500 rpmcorrect |
| Cylinders | 4correct |
| Cylinder layout | in linecorrect |
| Bore | 106 mmcorrect |
| Stroke | 135 mmcorrect |
| Operating cycle | four-stroke dieselcorrect |
| Injection | direct injectioncorrect |
| Aspiration | turbochargedcorrect |
| Turbocharger type | Variable Geometry Turbochargercorrect |
| Charge-air cooling | aircorrect |
| Emissions stage | Tier 4 (Final or Phase In)correct |
Origin and approval
| Version | D1Acorrect |
|---|---|
| Built from | 2015correct |
| Built to | 2022correct |
| Model year from | 2015correct |
| Model year to | 2026correct |
Frequently asked questions
How much power does the JCB 448 TA4-129 have?
The JCB 448 TA4-129 delivers 129 kW.
When was the JCB 448 TA4-129 built?
Production years: 2015-2023.
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 26 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
120
430 TA4-55
444 TA3-81
444 TA3-93
444 TA4-55
444 TA4-68
444 TA4-81
444 TA4-93
444 TA4i-68
444 TA4i-81
444 TA4i-93
448 TA3-108F
Sources: [1]
Diesel engine in 3D section
Turn the model, look inside and click an assembly — each one is explained.