HECHT 947 957 Chainsaw Oil Drive Pump Worm Gear

Oil drive pump worm gear fits Hecht 947, 957. Replacing part number 947000127. The worm gear sits on the crankshaft and meshes with the oil pump rotor, transferring rotational drive to maintain a continuous flow of bar and chain oil to the guide bar during cutting. Stripped or worn teeth on the worm gear break this drive connection entirely — the engine continues running normally, making a dry guide bar easy to attribute to an empty oil tank rather than the actual cause. Inspecting the worm gear should be the first step when oil starvation is diagnosed on these saws, before replacing the full pump assembly.

Fits the following Hecht models:

• Hecht 947
• Hecht 957

Replaces part number:

• 947000127