CAT D6M-LGP Dozer Undercarriage Parts — Conventional

Yes. The aftermarket CAT D6M-LGP undercarriage parts offered by Propel Parts are engineered as direct replacement components and are designed to meet or exceed OEM specifications for fit, function, and performance. Compatibility depends on your machine serial number prefix. This guide covers serial prefixes 2RN, 4GS, 4JN, and 5NR equipped with conventional track undercarriage. If you are unsure, provide your serial number and our team will verify fitment before shipment.

No, you can place your order normally. After ordering, simply provide your machine serial number through our Exact Fit Guarantee process. Our team will verify compatibility before shipment to ensure the correct parts are supplied. This guide covers Caterpillar D6M-LGP conventional undercarriage machines with serial prefixes 2RN, 4GS, 4JN, and 5NR.

Common replacement components for the Caterpillar D6M-LGP include HD TLA SALT Track Chains, Track Shoes, Lower Rollers (Single Flange and Double Flange), Top Carrier Rollers, Front and Rear Idlers, Sprocket Segment Groups, and Recoil Springs. These are commonly replaced during routine maintenance and complete undercarriage rebuilds.

A complete CAT D6M-LGP undercarriage rebuild typically requires 2 track chains, 90 track shoes per side, lower rollers (quantity varies by position), 2 top carrier rollers per side, 2 idler assemblies, 2 sprocket segment groups, and 2 recoil springs. Additional hardware such as track bolts, nuts, and segment hardware may also be required depending on wear.

CAT D6M-LGP track shoes are available in Single Grouser widths of 24", 28", 30", and 34". A 34" mud hole (W/MH) variant is also available. The right choice depends on your ground conditions and original machine configuration. Swamp-style shoes (34" swamp) are available for machines operating in wet or soft ground conditions — see our D6M-LGP Swamp Application guide for those configurations.

When replacing your CAT D6M-LGP track chains, inspect the track shoes, sprocket segments, lower rollers, top carrier rollers, and idlers. Replacing worn mating components at the same time helps maximize the lifespan of your new track chains and prevents premature wear.

The standard track specifications for the CAT D6M-LGP conventional undercarriage are: Pitch 7.50", Bolt Diameter 3/4", Link Height 119mm, and Bushing Outside Diameter (O.D.) 65.0mm. These specifications apply to serial prefixes 2RN, 4GS, 4JN, and 5NR.

Track hardware is typically sold separately. When replacing Caterpillar D6M-LGP track shoes, you will need the appropriate track bolts and nuts for your shoe width. It is recommended to use new hardware when installing new track shoes to ensure proper torque and retention.

If you're doing a complete undercarriage replacement on a Caterpillar D6M-LGP with conventional track, here's a full parts reference based on standard machine configuration:

Main Undercarriage Components

Our Exact Fit Guarantee is designed to prevent ordering errors. After placing your order, provide your machine serial number and our team will verify compatibility before shipping. If a fitment issue is identified, we will work with you to ensure the correct replacement parts are supplied for your CAT D6M-LGP dozer.