Where to Buy the Best 3010652 Caterpillar D3K2-LGP Bottom Roller Online in Canada?

3010652 is a single-flange bottom roller for the Caterpillar D3K2-LGP, and the word "single" is the part of that description worth pausing on. A bottom roller's flange guides the track from the side it sits on; the flange count and its position are part of the fitment, not a cosmetic difference, and a roller with the wrong arrangement will bolt up and then let the belt wander. So the number plus the flange configuration is the fitment - which is why both belong in writing on the order.

Last updated: October 5, 2026

This guide covers what a bottom roller does on a D3K2-LGP, why the flange configuration matters, how to confirm the part before buying in Canada, what wears a roller out, and what to inspect while the machine is up.

What the bottom roller does

Bottom rollers carry the machine's weight on the track and guide the belt as the machine moves. On a dozer, they also take the side loads that come from turning and from working across a slope. Their failure mode is consistent across machine classes: the seal is breached by grit or water, the bearing loses its lubrication, the roller stops turning, and the flat spot that develops starts hammering the belt and the frame. On a machine that works abrasive ground, that sequence is the normal way a roller dies - which is why the seal, not the running surface, is the specification to ask about first.

What makes this roller specific is the LGP configuration. Low ground pressure machines use wider shoes and a different undercarriage layout, and the roller's position and flange arrangement follow from that. Fitting a roller of the right diameter and bore but the wrong flange arrangement is a mistake that shows up as uneven belt wear rather than an obvious failure.

Confirming the part before you buy

Four checks, all taken from the roller you are removing.

The part number against your machine's model and serial number. Undercarriage specification changes across build series and across the LGP and standard configurations, so the number is the fitment and the model name is only the cross-check. The flange configuration: single flange, and which side it sits on. The running-surface diameter and width, which set the height the track runs at. The bore or shaft diameter and the mounting arrangement, measured with the hardware off - the dimension that is invisible once the roller is assembled. Write all four down before opening a listing; that record is what makes a wrong part a return instead of your problem.

What separates a durable roller from a cheap one

Two rollers that measure identically can differ substantially, and the difference is in three details: the seal design, the bearing type and load rating, and the material and treatment of the running surface. On abrasive ground the seal does the most work, because contamination is what ends the bearing; on hard, smooth ground the running surface takes more of the wear. A supplier who can state all three is selling a part you can compare with another. A supplier who can only state the price is not.

Ask for the warranty terms at the same time - a period plus an operating-hours cap, whichever comes first, with freight responsibility named. On a wear part, a warranty without those two numbers is not a warranty you can reason about.

Reading the roller you are replacing

With the machine raised and the track slackened to allow it, turn each roller by hand: any flat spot, roughness or free play means the bearing has failed. Look for a weep - oil or grease streaked along the undercarriage after the machine has stood is the earliest warning, and it means replace rather than watch. Compare running surfaces for even, shallow wear against deep or one-sided wear; one-sided wear points at alignment or tension rather than the part. And check the whole side: where the rollers share the same hours and ground, a single failure usually means the rest are close behind, and replacing the set in one job costs less than repeating the labour.

What the LGP configuration adds to that picture is worth understanding, because it changes the loads. A low ground pressure machine spreads its weight over a wider shoe and a longer footprint, which means each roller carries a lower average load but the undercarriage works in softer conditions - the ground where contamination reaches a seal fastest. On those machines the inspection interval matters more than on a standard-tracked equivalent, and the seal remains the part to specify carefully: a roller that has ingested water and grit fails on a schedule nobody chose.

Two practical consequences follow. First, on an LGP machine, checking rollers after working in wet ground is worth doing rather than waiting for the monthly round. Second, because the rollers are under a wider track and a lower load, plain wear tends to arrive later than contamination - which is why a set on a low ground pressure dozer can look healthy on the outside while one roller has already stopped turning.

Buying in Canada, and what else to check

The deciding factors on a part like this are easy to check and hard to argue with: the cross-reference in writing, the flange configuration and dimensions as supplied, and the stock position with a delivery date - because a machine waiting on a roller is the most expensive part of the job. The roller is listed with its machine fits at bottom roller 3010652 for Caterpillar, and the same catalogue carries the idlers, sprockets and shoes that surround it.

While the machine is up, it is worth inspecting the parts a bottom roller runs against: the idler face, the sprocket teeth and the track's inner surface. A roller rarely fails alone, and the cause of one failure is often the beginning of the next - which is why a set is frequently cheaper than the sequence of single replacements it prevents.

This article is part of the track rollers guide, which covers how bottom rollers are confirmed, how they wear and when to replace a set.

FAQs

What does bottom roller 3010652 fit?

It is a single-flange Caterpillar bottom roller listed for D3K and D4K machines, including the D3K2-LGP configuration. Confirm the number and the flange arrangement against your machine's model and serial number before ordering.

Why does the flange configuration matter?

The flange guides the track from the side it sits on. A roller with the wrong flange arrangement will mount but let the belt wander, which shows up as uneven wear on the belt and the surrounding components rather than as an obvious failure.

How do I know when a bottom roller needs replacing?

A flat spot or roughness when turned by hand, free play in the bearing, or a weep at the seal. The first two mean the roller has stopped carrying its load; the third means the bearing has lost its lubrication and cannot be saved in service.

Should I replace the rollers as a set?

Where they share hours and ground and one has failed, yes - the rest are close behind, and doing the work once with the track off costs less than three separate jobs. A single roller is reasonable when one has been damaged early on an otherwise sound set.

Does track tension affect roller life?

Directly. A loose track slaps and rides the sprocket; a tight one loads the rollers, idler and bearings. Set tension to the figure in the machine's manual, measured the manual's way, and check both sides.