cat d4

Cat D4

The Cat D4H is more nimble and lighter than the D5M’s and D5N’s and is better suited to jobs in tunnels, platforms or where obstructions make the with critical. The tolerances are the same as the D5’s with accuracy of +/- 7mm on fine material and +/- 20mm on the larger ballast materials.
the machine can be on tracked in less than a minute and has a top speed (where permitted) of 30kph.