JCB Hydra-Digga – specifications
Built: 1957-1960 · Series: Other models
Data for the version built 1957-1960 · Data origin: Reference work (Wikipedia/Wikibooks) · sources
More machines from model year 1957
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The JCB Hydra-Digga is a backhoe loader from JCB built from 1957 to 1960. It is regarded as the first backhoe loader with loader and backhoe permanently attached to the chassis rather than hung on a tractor as attachments; that made the machine more stable and allowed a comfortable operator cab. The register lists a water-cooled diesel engine.
Its predecessor was the JCB 1 Digger of 1953, a bolt-on backhoe based on the Fordson Major, of which about 200 were built up to 1956. The successor in 1960 was the JCB 4, with for the first time dual hydraulics, a 3-in-1 bucket and the two-lever control system for the backhoe. Production of the Hydra-Digga and Loadall exceeded 2,000 units. With the Hydra-Digga began the concept that still marks JCB: a machine that needs no conversion when switching between loading and digging and is operated by one person.
JCB excavators – other models: from the 3CX backhoe loader to the 3CX Hydrogen, mini excavators of the C-1 and Z-2 series as weight class, Perkins and Dieselmax engines
This page gathers the JCB excavators and backhoe loaders the register could not assign to a named range: from the early backhoe loaders 2D and 3D through the legendary 3CX – the most-built backhoe loader in JCB's history since 1980 – to the 3CX Hydrogen, a hydrogen-powered prototype of the early 2020s, plus mini, midi and crawler excavators of the C, X and Z series. On the mini and midi excavators, the number in the designation traditionally states the approximate operating-weight class in tenths of a tonne, so the 19C-1 weighs around 1.9 tonnes and the 90Z-2 around 9 tonnes. Engines on the classic backhoe loaders came mainly from Perkins, JCB's long-standing engine partner, before the brand switched to its own Dieselmax engines from 2004.
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The register lists here 40 versions, mostly with diesel engines, from the compact mini and micro excavators of the 8000 and C-1 series to the large excavators of the X series plus backhoe loaders, compact loaders and skid-steer models.
With this range JCB covers practically the whole earthmoving programme, from the mini excavator for garden and utility work to the backhoe loader as a distinctly British machine used on building sites, in municipal work and in agriculture worldwide; the backhoe loader ranks among the most recognisable construction machines of all.
On used examples, operating hours and the condition of the engine and hydraulic pumps, undercarriage or tyre wear, the condition of the boom, bucket and attachment lock, and the tightness of the cylinders all matter; spare parts run through the JCB dealer network, and on older backhoe loaders additionally through independent Perkins workshops.
Sources: SpecCodex register, model data: JCB Bagger (weitere Modelle), JCB (manufacturer)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Cooling | water-cooledcorrect |
Other data
| Predecessor | JCB 1 Diggercorrect |
|---|---|
| Successor | JCB 4correct |
Frequently asked questions
When was the JCB Hydra-Digga built?
Production years: 1957-1960.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — 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 6 individual figures for this model. They come from 2 recorded sources; 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: Tractor & Construction Plant Wiki (CC BY-SA 3.0) (retrieved August 2026) · Wikipedia (CC BY-SA 4.0) (retrieved October 2026) · Values adopted and presented in our own form; changes from the source are possible. · Data sources and cross-checks
Excavator in 3D section
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