Which idlers fit the Caterpillar 312 excavator, and what VANROCK option is available?

Expert Answer

For the CATERPILLAR 312 v1, VANROCK supplies an idler (type 1) under part code VRTP780104, with a verified weight of 80.00 kg. It is the undercarriage front guide component that helps keep the track aligned and running smoothly on the machine. VANROCK is an independent manufacturer and is not affiliated with Caterpillar.

If you are replacing the idler on a Cat 312, check whether your machine uses the same idler type and compare the mounting points, track guide width, and overall wear pattern on the old part. An idler should be replaced when the rim, guide surfaces, or bearing area are worn, when the track no longer stays correctly aligned, or when adjustment travel is no longer reliable.

VANROCK also supplies the related undercarriage parts for this model, including track chain, track group, track shoe, carrier roller, track roller, sprocket segment, track bolt, and track nut. For exact fitment confirmation and pricing, VANROCK quotes through its appointed dealer network on request.

Answered by VANROCK specialists · Published 11/5/2026