Dozer Undercarriage Parts
Bulldozer Track Master Link 17M-32-08210 17M-32-08220 for Komatsu D275 Undercarriage
The master link is the only part of your track chain that you can actually take apart. When it wears out or cracks, the whole chain becomes impossible to service without cutting links – and that means expensive downtime. Our 17M-32-08210 (LH) / 17M-32-08220 (RH) master link kit is engineered specifically for the Komatsu D275A-5 and D275AX-5 series. It’s the exact replacement for the factory lubricated track system (78-link configuration), built to the same pitch and bolt pattern so it drops in without modification.
Komatsu D275 Bulldozer Track Master Link Specifications:
| Item | Specification |
| Part Numbers | 17M-32-08210 (Left Hand) / 17M-32-08220 (Right Hand) |
| Compatible Models | Komatsu D275A-5, D275AX-5, D275A-5R (S/N 35021+) |
| Track Type | Sealed & Lubricated (Lubricated Track Link) |
| Pitch | 260 mm (10.24") |
| Material | 35MnB high-tensile alloy steel |
| Heat Treatment | Deep induction hardening + tempering |
| Hardness | HRC 52-58 (surface) |
| Warranty | 12 months or 2,000 hours (whichever comes first) |
Role in the Undercarriage System
The master link is the “hinge” of the entire track chain.
It connects the two ends of the chain and carries the highest load when the machine pushes, turns, or works in rocky ground.
If the master link stretches, cracks, or loses its wedge-ring seal, the whole chain loses tension and starts to whip. This quickly destroys rollers, idlers, and sprockets. Replacing it at the right time is the cheapest way to protect the rest of your 50,000+ USD undercarriage.
Our D275 Master Link Advantages
1. Built Tough for Heavy-Duty Abuse
Made from premium 35MnB high-tensile alloy steel with deep induction hardening (HRC 52–58 surface). This gives superior wear resistance, crack resistance, and fatigue strength – perfect for mining, quarrying, or rocky sites where standard links fail early.
2. Exact OEM-Match Fit & Drop-In Installation
100% dimensionally matched to Komatsu originals (260 mm pitch, precise bolt pattern, wedge-ring seal design). No modifications needed – installs quickly and keeps your track perfectly aligned from day one, reducing the risk of chain snaking or premature roller/sprocket damage.
3. Longer Service Life & Lower Total Cost
Stronger material and better heat treatment mean fewer replacements, less downtime, and big savings on full chain rebuilds.
4. Factory-Direct Quality & Strict Inspection
As a specialized manufacturer, we forge, machine, and heat-treat in-house. Every link gets ultrasonic + magnetic particle testing – no hidden cracks or weak spots. You get consistent quality at factory prices, without trader markups.
5. Protects Your Entire Undercarriage
A strong, reliable master link prevents stretch, seal failure, or breakage that cascades into accelerated wear on rollers, idlers, sprockets, and bushings. Replacing it proactively is the cheapest way to extend your whole undercarriage life by thousands of hours.
6. Worry-Free Overseas Buying
We verify compatibility with your machine serial number/photos before shipping. Worldwide fast delivery, 12-month/2,000-hour warranty, and full support – so you get peace of mind even on remote job sites.
Why Choose Us
We are a specialized undercarriage manufacturer with our own forging, machining, and heat-treatment lines.
1. Direct factory pricing – no middleman markup
2. Every link is 100% dimensionally checked against original Komatsu drawings
3. We use the same 35MnB steel and heat-treatment process as the OEM
4. Strict ultrasonic and magnetic particle inspection on every master link before packing
5. Over 18 years supplying D275 fleets in Australia, South Africa, Indonesia, and the Middle East
Full Range of Undercarriage Parts for Komatsu D275 – One-Stop Solution
Besides our high-quality Track Master Link (17M-32-08210 / 17M-32-08220), we manufacture and supply a complete lineup of aftermarket undercarriage components specifically for the Komatsu D275A-5, D275AX-5, and related series.
Many customers replace the master link during a full track chain service or undercarriage rebuild – getting everything from the same factory ensures consistent material quality, perfect compatibility, and better pricing on bundled orders.
We produce:
Track Chains (sealed & lubricated, 39-links per side, full assemblies available)
Track Shoes / Pads (single grouser, various widths for different ground conditions)
Track Rollers (bottom rollers – single flange & double flange)
Carrier Rollers (top rollers)
Front Idlers (guide wheels)
Sprockets & Segments (drive sprockets)
Track Hardware (bolts, nuts, pins, bushings, master pins)
Q: Will these fit my D275A-5 without modification?
A: Yes – exact OEM dimensions and bolt pattern. Plug-and-play.
Q: Are they left and right specific?
A: Yes. 17M-32-08210 is Left Hand, 17M-32-08220 is Right Hand. We always sell them as a matched pair.
Q: Do you offer full track chain assemblies?
A: Yes – we can supply complete 78-link sealed chains with these master links already installed.
Q: Warranty?
A: 12 months or 2,000 working hours. We replace any defective link free of charge.
Address : Building 17, Block 9, Section D, 27th Road, Chenghui International Hardware and Electrical City, Xiamei Town, Nan'an City, Quanzhou, Fujian Province
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