KOMATSU PC200-7 PC200-8 Lower Track Roller 20Y-30-00014 Detailed Information

Basic Information

• Primary OEM Part Number: 20Y-30-00014 (also written as 20Y3000014)
• Interchangeable Part Numbers: 20Y-30-00011, 20Y-30-00012, 20Y-30-00013, 20Y-30-00015, 20Y-30-00016, 20Y-30-00130, 20Y-30-00131, KM1428, KM3365, VA4020G0
• Alternative Names: Bottom Track Roller, Track Support Roller, Single Flange Lower Roller
• Category: Excavator Undercarriage Parts - Track Support System
• Original Manufacturer: KOMATSU

Compatible Models

This single flange lower track roller fits the following KOMATSU construction equipment models:

• PC200 Series: PC200-7, PC200LC-7, PC200NLC-7, PC200-8, PC200LC-8, PC200NLC-8, PC200SC
• PC160/PC180/PC190 Series: PC160LC-7, PC160LC-8, PC180LC-7, PC180NLC-7, PC190LC-8, PC190NLC-8
• PC210/PC220 Series: PC210-7, PC210LC-7, PC210NLC-7, PC210-8, PC210LC-8, PC220-7, PC220LC-7, PC220-8, PC220LC-8
• PC228/PC230/PC240 Series: PC228US-3, PC228USLC-3, 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 38-41 kg (83.8-90.4 lbs)
Roller Body Material	Forged 50Mn / 40MnB / 40Mn2 high-strength boron steel
Surface Treatment	Induction-hardened tread surface
Surface Hardness	HRC 50-56 with 8-12mm deep hardened layer
Shaft Material	42CrMo alloy steel
Shaft Surface Roughness	Ra 0.2-0.4 (precision CNC polished)
Bushing Type	Bi-metal copper bushing (0.6mm thick copper layer)
Seal System	Double floating oil seal with 2% molybdenum content
Lubrication	Factory pre-lubricated with high-temperature lithium grease
Design Life	3000-4000 operating hours under normal conditions
Quantity per Machine	14 units total (7 per track: 5 single flange, 2 double flange)

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Function: Supports the entire weight of the excavator, distributes load evenly to the track shoes, guides the track chain movement, and absorbs impact loads from uneven terrain. The single flange design prevents the track chain from derailing during operation.

Market Price & Availability

• Chinese Aftermarket: $35 - $55 per unit (6 months to 1 year warranty)
• European/American Aftermarket: $70 - $120 per unit (1-2 year warranty)
• Genuine KOMATSU: $180 - $280 per unit
• Major Aftermarket Brands: Berco, ITR, Blumaq, Shantui, WSG Machinery, Costex Tractor Parts
• Lead Time: 1-3 days for shipping from Chinese suppliers, 7-15 days for international delivery
• Note: Sold individually. It is highly recommended to replace all track rollers on one side at the same time to ensure even wear and prevent premature failure of other undercarriage components.

Related Parts

• 20Y-30-00017: Double flange lower track roller (for the same machine)
• 20Y-30-00481: Upper carrier roller (top roller)
• 20Y-30-00321: Front idler assembly
• 20Y-27-11582: Drive sprocket
• 20Y-30-00130: Track roller seal and bushing repair kit
• 20Y-30-11340: Mounting bolt kit

Installation & Maintenance Precautions

1. Critical Safety Warning: Always use proper lifting equipment when handling track rollers. Never work under an excavator that is not securely supported on jack stands.
2. Pre-Installation Inspection: Thoroughly inspect the track frame mounting surfaces for cracks, deformation, or excessive wear. Clean all surfaces completely to ensure proper contact.
3. Torque Specification: Tighten the mounting bolts to 120-140 N·m in a crisscross pattern to ensure even pressure distribution. Re-torque after the first 50 hours of operation.
4. Lubrication: Most modern track rollers are lifetime lubricated and do not require regular greasing. Do not attempt to add grease through the shaft.
5. Regular Inspection: Inspect track rollers every 250 operating hours for:
   • Tread wear (replace if wear exceeds 10mm)
   • Oil leakage from the seals
   • Abnormal noise or excessive play
   • Cracks or deformation in the roller body
6. Debris Management: Clean accumulated mud, rocks, and debris from around the track rollers regularly to prevent premature wear and seal damage.
7. Replacement Best Practice: For maximum service life, replace track rollers at the same time as the track chains and sprockets. Mismatched components will cause accelerated wear to all undercarriage parts.