KOMATSU PC200-7 PC200-8 Drive Sprocket 20Y-27-11582 Detailed Information

Basic Information

• Primary OEM Part Number: 20Y-27-11582 (also written as 20Y2711582)
• Interchangeable Part Numbers: 20Y-27-11580, 20Y-27-11581, 20Y-27-K1110, 20Y-27-77110, 20Y-27-D3060, KM1501 (Berco), R4022000M01
• Alternative Names: Track Sprocket, Sprocket Rim, Final Drive Sprocket, Drive Wheel
• Category: Excavator Undercarriage Parts - Track Drive System
• Original Manufacturer: KOMATSU

Compatible Models

This drive sprocket fits the following KOMATSU construction equipment models:

• PC200 Series: PC200-5, PC200-6, PC200-7, PC200LC-7, PC200NLC-7, PC200-8, PC200LC-8, PC200NLC-8, PC200LL, PC200SC
• PC150/PC160 Series: PC158US-2, PC160LC-7, PC160LC-8
• PC180/PC190 Series: PC180LC-7, PC180NLC-7, PC190LC-8, PC190NLC-8
• PC210/PC220 Series: PC210-7, PC210LC-7, PC210NLC-7, PC210-8, PC210-10, PC220-7, PC220LC-7, PC220-8, PC220LC-8
• PC228/PC230/PC240 Series: PC228US-3, PC228USLC-3, PC228US-8, PC230-7, PC240-7, PC240LC-7, PC240-8
• Other Equipment: BR300S-1/2, BR350JG-1, BR380JG, BR480RG-1, BP500

Technical Specifications

Parameter	Value
Complete Assembly Weight	Approximately 35-37 kg (77-81.4 lbs)
Tooth Count	21 teeth (OEM standard configuration)
Internal Diameter	470 mm
Mounting Holes	20 bolt holes (matches OEM bolt pattern)
Body Material	Forged 40Mn2 / 50Mn high-strength alloy steel
Surface Treatment	Induction-hardened tooth surfaces
Surface Hardness	HRC 50-57 with 4-8mm deep hardened layer
Design Life	3000-4000 operating hours under normal conditions
Quantity per Machine	2 units (1 per final drive)

S9ER
Function: Engages with the track chain links to convert rotational power from the final drive into linear movement, providing traction for the excavator. It also helps maintain proper track alignment and distributes drive forces evenly across the undercarriage.

Market Price & Availability

• Chinese Aftermarket: $50 - $120 per unit (6 months to 1 year warranty)
• European/American Aftermarket: $180 - $300 per unit (1-2 year warranty)
• Genuine KOMATSU: $400 - $650 per unit
• Major Aftermarket Brands: Berco, ITR, Blumaq, Shantui, Costex Tractor Parts, A&S Machinery
• Lead Time: 1-3 days for shipping from Chinese suppliers, 7-15 days for international delivery
• Note: Sold individually. It is strongly recommended to replace both sprockets at the same time to ensure even track wear and prevent premature failure of other undercarriage components.

Related Parts

• 20Y-27-11340: Sprocket mounting bolt kit (includes bolts and washers)
• 20Y-27-11110: Final drive hub / sprocket carrier
• 20Y-27-11210: Final drive oil seal kit
• 20Y-30-00140: Lower track roller (single flange)
• 20Y-30-00321: Front idler assembly (matches this sprocket)

Installation & Maintenance Precautions

1. Safety Warning: Always use proper lifting equipment when handling sprockets. Ensure the excavator is securely supported on jack stands before working on the undercarriage.
2. Pre-Installation Inspection: Thoroughly inspect the final drive hub for cracks, deformation, or excessive wear. Clean all mounting surfaces completely to ensure proper contact.
3. Torque Specification: Tighten the mounting bolts to 180-220 N·m in a crisscross pattern to ensure even pressure distribution. Re-torque after the first 50 hours of operation.
4. Replacement Timing: Replace the sprocket immediately if:
   • Tooth tip wear exceeds 10mm
   • Any teeth are cracked, broken, or severely deformed
   • There is excessive play between the sprocket and track chain
   • The sprocket shows signs of uneven wear (indicates misalignment)
5. Regular Inspection: Inspect the sprocket every 250 operating hours for signs of wear, damage, or loose bolts.
6. Undercarriage Matching: For optimal performance and longevity, replace the sprockets at the same time as the track chains. Mismatched components will cause accelerated wear to all undercarriage parts.