Hub

Undercarriage Parts Guides: Every Topic on This...

This is the index of every guide on the site, grouped the same way the menu is. Start with the component you are working on, or the job you are...

Floating Seals and Bearings for Undercarriage C...

A floating seal is the reason an oil-filled roller lasts a service interval instead of a season — two lapped metal rings held together by an O-ring, sealing a rotating...

Undercarriage Problems in the Field: Mud, Clay,...

Diagnose the operating condition first, then inspect the components it can overload. Replacing the visible casualty without removing the cause produces repeat failures. This guide organizes 15 detailed articles into...

Excavator Idlers: Selection, Wear and Replacement

The front idler sets track alignment for the whole undercarriage, which is why a worn idler shows up as the track jumping rather than as a worn idler. This page...

Shipping, Packing and Trade Documents for Heavy...

Heavy parts are lost on paperwork more often than on price: the wrong chargeable weight, a missing ISF filing, a packing list that does not match the invoice, a letter...

Carrier Rollers (Top Rollers): The Complete Guide

Carrier rollers carry the weight of the chain on the return run, so they fail for different reasons than bottom rollers do: contamination through the seal, clearance problems, and chain...