Mack AC
Series: Other models
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
Mack NJU 5-ton 4x4 truck: off-road truck with a Mack EN532 engine, 101.4 kW output, a five-speed manual gearbox and a two-range transfer case, weighing 7,521 kg
Mack Trucks is a US commercial vehicle manufacturer based in Pennsylvania, known for rugged, heavy trucks. The 5-ton 4x4 truck designated NJU belonged to the company's off-road series.
Read on 3 more paragraphs
The Mack EN532 engine produces 101.4 kW, or 136 hp, and is paired with a five-speed manual gearbox and a two-range transfer case for the four-wheel drive. At a weight of 7,521 kg, the vehicle matches the 5-ton nominal payload class named in the designation.
Pairing a five-speed gearbox with a two-range transfer case was standard on off-road 4x4 trucks of this weight class: the low range allows crawling, powerful movement over difficult terrain, while the high range is used on the road. The 5-ton designation refers to nominal payload, not the vehicle's overall weight.
When buying one, the key points are the condition of the transfer case and its seals, rust in the frame and axle housings, and the operation of the four-wheel-drive hubs and differentials. The Mack EN532 engine should be checked for compression and the condition of the injection pump, since parts for this older unit must be sought out specifically. The leaf springs on all axles and the steering linkage are also worth checking for play and wear, given the loads typical of off-road use, along with the condition of the exhaust and the tightness of the fuel lines.
Sources: SpecCodex-Register: Kennwerte des Modells Mack NJU 5-ton 4x4 truck
Technical data
Engine
| Engine | 4-cylinder 74 bhp kW petrolcorrect |
|---|
Drivetrain and chassis
| Gearbox | 3 speed selective with clutch brakecorrect |
|---|
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.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- 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.
We do not sell machines. We ask the dealers who carry this model and come back with price and lead time.
Request a quote →
We ask the suppliers and come back with price and lead time.
Request spare parts →
This page carries 2 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.
Missing a figure you were looking for? Report it →
Know this machine better? Have a photo, a manual, or know that a figure is wrong? Add it to the register →
Other models in this series
Sources: [1]
Fire appliance in 3D section
Turn the model, look inside and click an assembly — each one is explained.