D6N LGP Top roller CR4799, 6Y3908 for Caterpillar Upper Roller High quality SQ machine
D6N LGP Top roller CR4799, 6Y3908 for Caterpillar Upper Roller High quality SQ machine
6Y3908
AT175426
AT306803
1080551
108-0551
2295446
229-5446
Aftermarket D6N top roller — also called carrier roller or upper roller — for Caterpillar D6N and D6NLGP bulldozers. OEM cross-references: CAT 6Y3908, BERCO CR4799, CAT 229-5446 · 108-0551, John Deere AT175426 · AT306803. Forged 50Mn steel, floating seal, 1-year warranty. Fitment confirmed by OEM number, machine sub-model or photos before every shipment. Ships from Xiamen and Guangzhou worldwide.
Aftermarket D6N Top Roller — CAT 6Y3908 · CR4799 · 229-5446
Carrier roller profile — tread surface and bracket mounting ears
Product Specifications
| Machine Model | Caterpillar D6N / D6NLGP Bulldozer |
|---|---|
| Part Type | Carrier Roller / Top Roller / Upper Roller |
| OEM Cross References | CAT 6Y3908 | CAT 6Y-3908 CAT 229-5446 | CAT 2295446 CAT 108-0551 | CAT 1080551 BERCO CR4799 John Deere AT175426 | AT306803 |
| Compatible Brand | Caterpillar (CAT) |
| Machine Type | Bulldozer / Dozer |
| Material | 50Mn Steel (forged blank) |
| Technique | Forging + Medium-Frequency Induction Hardening |
| Temperature Rating | High-temperature rated — suitable for Middle East & Gulf operations above 45°C |
| Supply Brand | ShunQi Track |
| Warranty | 1-Year Free Replacement Warranty |
| Shipment Port | Xiamen / Guangzhou |
| Fitment Check | By machine model, OEM number, BERCO reference, photos or dimensions |
Why Choose SQ Carrier Rollers?
We know that equipment downtime costs you money. Instead of generic marketing claims, here is exactly what you get when you install our aftermarket D6N top roller — and why contractors running CAT bulldozers in the Gulf, Australia and North America keep coming back for the same part.
Machined strictly to CAT 6Y3908 and CR4799 specifications. No modifications needed — bolt it on and get back to work. The same fitment logic applies whether your procurement system uses the CAT number, the BERCO reference or the John Deere AT175426 cross-reference.
Forged from 50Mn steel and medium-frequency induction hardened. The outer shell resists abrasion from sand and gravel while the core stays tough enough to take impact shocks on rough ground. This is the same heat treatment spec used on the OEM design.
Every batch is tested for seal integrity and dimensional accuracy before it leaves our facility. The seal compound is rated above 45°C continuous ambient — built for the Middle East, not just a temperate workshop. We do not ship parts that would not pass our own inspection.
Factory quality control — dimensional check and seal integrity test
Factory quality certificate — Quanzhou Shunqi Construction Machinery Parts Co., Ltd.
Cross-Reference & Full Compatibility — D6N / D6NLGP
One roller, eight catalogue numbers. Caterpillar revised this part number at least twice across service manual editions, and different regional parts systems picked up different revisions. BERCO assigned their own reference CR4799 for the same assembly. John Deere AT175426 and AT306803 appear because John Deere licensed and co-produced several Caterpillar dozer platforms sharing the same undercarriage geometry — if your procurement system runs on John Deere numbers, either reference confirms this is the correct roller. Match any number in the table below to confirm the fit.
This carrier roller covers all D6N variants listed below. If you run a mixed D6N fleet on the same site — standard, XL and LGP units together — one part number covers all of them. No separate SKUs, no risk of ordering the wrong variant. Check the Series number on the machine plate if you are not sure which generation your unit is.
Technical cross-section — tread surface, shaft, bushing and floating seal | OEM 6Y3908 / CR4799
| Supplier / Brand | Part Number(s) |
|---|---|
| Caterpillar (CAT) | 6Y3908 · 6Y-3908 · 229-5446 · 2295446 · 108-0551 · 1080551 |
| BERCO | CR4799 |
| John Deere | AT175426 · AT306803 |
| Model | Variants / Notes |
|---|---|
| Caterpillar D6N | D6N · D6N Series II · D6N XL · D6N LGP |
| Caterpillar D6NLGP | D6NLGP · D6N LGP Series II |
What to Check Before Ordering
Packaging & Shipment
Each roller gets rust-inhibiting film on the tread and foam padding around the seal faces, then goes onto a standard export pallet. Every pallet is wrapped in waterproof stretch film and strapped before it goes into the container — nothing shifts in transit. For a full D6N set, pallets are arranged per side so your crew pulls one pallet per crawler and works through it in order.
Standard export pallet — waterproof stretch film wrap + strapping, FCL and LCL shipment from Xiamen / Guangzhou
FCL sea freight from Xiamen or Guangzhou runs approximately 30 days to most ports including Jebel Ali, Dammam and Shuwaikh. LCL consolidation takes approximately 45 days. For urgent single-piece requirements, DHL or FedEx delivers in 5–7 days door to door.
Other Caterpillar Bulldozer Models — Undercarriage Parts Available
ShunQi Track / PartsCrane supplies Caterpillar bulldozer undercarriage parts across the full CAT dozer range — carrier rollers, track rollers, front idlers, sprockets, track chains and track shoes. Each part confirmed to the specific sub-model before shipment. Browse the full range in our Excavator & Bulldozer Parts catalogue.
| Series | Models |
|---|---|
| D3 / D4 / D5 | D3C D3G D3K D4C D4G D4H D4K D5C D5G D5H D5K D5M D5N |
| D6 | D6H D6N D6NLGP D6R D6R Series II D6R Series III D6RXL D6T |
| D7 / D8 | D7G D7H D7R D7R Series II D8L D8N D8R D8R Series II D8T |
| D9 / D10 / D11 | D9L D9N D9R D9T D10N D10R D10T D11N D11R D11T |
Frequently Asked Questions
What is the OEM part number for the CAT D6N bulldozer carrier roller?
The main Caterpillar numbers are 6Y3908 and 229-5446. The same roller also appears as 6Y-3908, 2295446, 108-0551 and 1080551. BERCO lists it as CR4799. John Deere cross-references are AT175426 and AT306803. Any of these confirms the correct carrier roller for D6N and D6NLGP bulldozers.
Does this carrier roller fit both the D6N and D6NLGP?
Yes — D6N, D6N XL, D6N LGP and D6NLGP all use this roller. The LGP variant runs wider shoes for soft ground but the carrier roller mounting and OEM number are the same. Check the Series number on the machine plate if you are not sure which generation your unit is.
Why does the John Deere AT175426 cross-reference to a CAT D6N part?
John Deere licensed several Caterpillar dozer platforms with the same undercarriage geometry. AT175426 and AT306803 are the John Deere catalogue numbers for the same physical roller. Full background is in the Cross-Reference section above.
Can this aftermarket D6N top roller handle the heat in Saudi Arabia, UAE and Gulf countries?
Yes. Ground surface temperatures in Saudi Arabia and the UAE hit 60°C in summer. Standard seals made for cooler climates lose their lubricant within a few months — once the seal goes, the roller seizes and the track chain grinds directly on the frame rail. Our D6N carrier rollers use a seal compound rated above 45°C continuous ambient. Operators in the Gulf get 12 months out of these rollers through full summer seasons. That figure is the basis of the 1-year Gulf warranty.
How many carrier rollers does a CAT D6N need per side?
Two per side, four per machine. When one seal fails, replace both rollers on that side at the same time — it keeps wear even on the track chain and saves you pulling the machine again in a few months for the second one.
Is this a genuine Caterpillar part?
No — aftermarket replacement made by ShunQi Track / Quanzhou Shunqi Construction Machinery Parts Co., Ltd. OEM numbers and brand names are used only to identify which machines the part fits. No connection to Caterpillar Inc., Berco S.p.A. or John Deere.
What does the 1-year warranty cover?
Seal failure and tread defects for one year from shipment. Send photos and machine hours — we arrange a free replacement or credit. Covers Gulf high-temperature operating conditions.
How long does shipping take to the Middle East from Fujian, China?
FCL: around 30 days. LCL consolidation: around 45 days. Urgent single-piece DHL or FedEx: 5–7 days door to door. Destination ports include Jebel Ali, Dammam, Shuwaikh, Sohar and Hamad Port. Incoterms — FOB, CIF or DAP — confirmed at quotation stage.
Last updated: July 27, 2026
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