Undercarriage components — pins, bushes, track bushes, spacers and stick ends — are consumable by design, but the rate at which they wear varies enormously based on maintenance habits, not just hours on the clock. Since undercarriage wear is typically 40–50% of total excavator running costs, a few consistent habits pay for themselves quickly.
## Keep Grease Fresh, Not Just Present
Grease-hole (WGH) pins and bushes need regular, correctly-interval greasing — not just topping up when convenient. Old, contaminated grease traps abrasive grit against the pin surface, accelerating wear faster than running with slightly less grease but keeping it clean and fresh.
## Match Pin and Bush Wear, Don't Mix Old With New
Fitting a new pin against a worn bush (or vice versa) accelerates wear on the new component as it takes up the clearance the worn part has already developed. Whenever you replace one half of a pin-and-bush pair, inspect the other half and replace it too if it's more than midway through its service life.
## Monitor Track Tension Consistently
Both over-tight and over-loose tracks accelerate undercarriage wear — over-tight tracks increase load on pins, bushes and bearings, while over-loose tracks increase impact loading and derailment risk. Check tension against manufacturer spec on a fixed schedule rather than only when something looks visibly off.
## Rotate and Inspect Track Bushes Before They're Fully Worn
Waiting until a track bush is fully worn through before replacement risks damage to the more expensive track link itself. Scheduled inspection — checking bush wear against a wear-limit gauge — lets you replace bushes on your terms rather than reacting to a failure in the field.
## Watch Collar Bushes and Stick Ends Under Heavy Attachments
Machines running heavy attachments like breakers put concentrated load through collar bushes and stick ends. These wear faster under breaker duty than standard digging work, so increase inspection frequency accordingly rather than applying a blanket maintenance interval across all attachments.
Our [excavator pins & bushes range](/categories/excavator-pins-bushes) covers pins, bushes, track bushes, track pins, spacers, collar bushes and stick ends across JCB, Komatsu, Hitachi, Hyundai, Kobelco, Volvo and SANY fitments — keeping matched, correctly-speced components on hand makes timely replacement much easier.
