Applicable Models

Komatsu PC1250-7/8/11, PC1250SP-8/11 (106–120 ton class)

Motor Model

KYB MSF-340VP-EH6 (piston type, slipper design)

Motor Displacement

337 cm³/rev

Reduction Type

Triple Planetary Reduction

Reduction Ratio

Approx. 120–130

Max. Output Torque

120,000–140,000 N·m (120–140 kN·m)

Max. Drawbar Pull

686 kN (70,000 kgf)

Travel Speed (2-speed)

Low: 2.1–2.3 km/h; High: 3.2–3.3 km/h

Rated / Max. Working Pressure

35 MPa / 40 MPa

Brake System

Built-in wet multi-disc parking brake + hydraulic travel lock

Assembly Weight

Approx. 500 kg (motor + gearbox)

Lubrication / Oil Capacity

Gear oil lubrication; single-side final drive oil capacity: 21 L

Original Part Numbers

21N-60-34100 (travel motor assembly); 21N-27-00130/140 (gearbox)