• 120-27-31411 1202731411 Pinion KOMATSU Bulldozer Spare Parts Fitting For D40A-3 D41A-3​

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• Specifiion

• Key functions

1.Swing Motion Enablement: Transfers power from the hydraulic motor/gearbox to the swing ring gear, allowing the upper structure to rotate 360°—vital for tasks like digging, loading, and material placement.

2.Torque Amplification: Works with the swing gearbox to multiply torque, providing enough force to rotate the excavator’s heavy upper structure (≈10–12 tons for PC120-6).

3.Smooth Operation: Precision meshing and helical teeth minimize vibration and noise, improving operator comfort and reducing wear on other swing drive components.

4.Load Distribution: Even tooth contact distributes stress across the pinion and ring gear, extending the service life of both components.

• Compatible models

BULLDOZERS D40A D40AM D40F D40P D40PF D40PL D40PLL D41A D41E D41P
CRAWLER LOADERS D41Q D41S Komatsu

• More other pinion applied to KOMATSU heavey machine

• Directory listing

• We could supply the following spare parts

1 Hydraulic parts: hydraulic pump, main valve, hydraulic cylinder, final drive, travel motor, swing machinery, swing motor etc.

2 Engine parts: engine ass’y, piston, piston ring, cylinder block, cylinder head, crankshaft, turbocharger, fuel injection pump, starting motor and alternator etc.

3 Undercarriage part: Track roller, Carrier roller, Track Link, Track shoe, Sprocket, Idler and Idler cushion etc.

4 Cab parts: operator’s cab, wiring harness, monitor, controller, seat, door etc.

5 Cooling parts: Radiator, air conditioner, compressor, after cooler etc.

6 Other parts: Service kit, swing circle, engine hood, swing joint, fuel tank, filter, boom, arm, bucket etc.

• Packing and Shipping

Packing Details :

inner packing : plastic film for wrapping

external packing : wooden

Shipping :

within 3 days after received the payment , by air or by express or by sea on the basis of the

quantity and emergency circumstances.

1. By Couriers: DHL, UPS, FEDEX, TNT are the main courier companies we are cooperated,

2. By Air: Delivery from the Guangzhou air port to customer's destination city air port.

3. By Sea: Delivery from the Huangpu port .

WHO WE ARE: We are excavator spare parts professional supplier.

WHAT WE DO: Our supply chain cover Engine parts, Hydraulic parts, final drive and swing gear parts, undercarriage parts, GET attachment parts, air conditioning parts, quick wear parts. We have been serving either in domestic market or overseas market, over 8 years' experience in excavator parts area enable us to have firm cooperation and partnership with many overseas customers.

WHOM WE SERVICE: Construction Company, Excavator parts wholesaler, Excavator parts dealer, Government, Personal.

Customer satisfaction and optimal machine performance are what ANTO Parts strive for by providing large storage of spare parts, reliable service and readily available stock. Approximately 95% of all most well known brands( Komatsu Hitachi Vo-lvo Hyundai Doosan Kobelco Kato Sumitomo JCB, SANY, XCMG, LONGKING, and so on) of excavator parts are continuously in stock.

“Customer can get quality and correct parts at best price, soonest way” is our final target.

We now have the biggest parts warehouse and improved storage system, 90 000 cubic meter room making it possible to storage the most commonly required construction machinery parts for instant delivery for customer urgent’ use.

We can supply spare parts for different kinds of request, either for genuine spare parts, OEM parts, aftermarket parts, or second-hand used spare parts.

We stock various types of assemblies of hydraulic pump, final drive and swing drive, control valve, OEM or Genuine, from Korea and Japan, or China made.

You can count on us for various range of spare parts as below:

Engine spare parts, undercarriage track parts, Seal kits parts, Electric spare parts, Hydraulic spare parts, attachment bucket and rock breaker spare parts.