The wheeled undercarriage with four-point swing outriggers provides a base of 9.5m by 6.5m with individual control. The machine has 70t wide gauge axles, infinitely variable one-axle-travel drive via one hydraulic variable displacement motor, and all-wheel steering.
The machine has a special materials handling boom with a reach of up to 24m. This consists of a 14m curved boom (banana boom) and an 11m grab handling stick with special materials handling kinematics. The boom and stick cylinders feature end position damping including safety check valves for lifting cylinder and an end position shut off boom up/down and stick in/out function.
The 870M is also fitted with a type 600 skylift-cab.
