The Carrier Roller, also known as Top Roller or Upper Roller, is mounted above the track frame of the Komatsu PC400-8 crawler excavator.
For a 40-ton class excavator, the undercarriage operates under heavy dynamic loads during digging, travelling and continuous working conditions. The carrier roller supports the upper track chain, maintains correct chain alignment and reduces friction between moving undercarriage components.
A worn or damaged carrier roller may lead to:
Our PC400-8 carrier rollers are manufactured using professional undercarriage production technology and provide a reliable aftermarket replacement solution for equipment distributors, mining contractors and repair workshops.
Designed for:
Komatsu PC400-8
Suitable for:
Manufactured from:
40Mn2 Alloy Steel
Benefits:
The roller tread surface is processed with controlled induction hardening.
Typical specification:
Provides improved resistance against continuous track-chain loading and abrasive working conditions.
Equipped with:
The sealing structure helps prevent lubricant leakage and protects internal components from mud, dust and water contamination.
Manufactured according to OEM-style dimensions:
Designed for direct bolt-on replacement after confirming the correct specification.
| Item | Specification / Detail |
|---|---|
| Product Type | Excavator Undercarriage Carrier Roller |
| Machine Model | Komatsu PC400-8 |
| Compatible Models | PC400-8 |
| Machine Type | Crawler Excavator |
| Machine Class | Approx. 40 Ton |
| OEM Part Number | Confirm by machine serial number |
| Material Grade | 40Mn2 Alloy Steel |
| Manufacturing Process | Forging / Casting + CNC Machining |
| Heat Treatment | Induction Hardening |
| Surface Hardness | HRC 52-58 |
| Hardening Depth | 8mm-12mm |
| Seal System | Heavy-duty Floating Oil Seal |
| Lubrication System | Lifetime Internal Lubrication |
| Bearing Structure | Hardened Shaft + Wear-resistant Bushing |
| Quality Inspection | Dimension, Hardness and Sealing Inspection |
| Mounting Configuration | OEM Standard |
| Installation | Bolt-on Direct Replacement |
| Application | Mining / Construction / Heavy Earthmoving |
| Shipping Note | Heavy Component — Sea Freight Recommended |
The Carrier Roller, also known as Top Roller or Upper Roller, is mounted above the track frame of the Komatsu PC400-8 crawler excavator.
For a 40-ton class excavator, the undercarriage operates under heavy dynamic loads during digging, travelling and continuous working conditions. The carrier roller supports the upper track chain, maintains correct chain alignment and reduces friction between moving undercarriage components.
A worn or damaged carrier roller may lead to:
Our PC400-8 carrier rollers are manufactured using professional undercarriage production technology and provide a reliable aftermarket replacement solution for equipment distributors, mining contractors and repair workshops.
Designed for:
Komatsu PC400-8
Suitable for:
Manufactured from:
40Mn2 Alloy Steel
Benefits:
The roller tread surface is processed with controlled induction hardening.
Typical specification:
Provides improved resistance against continuous track-chain loading and abrasive working conditions.
Equipped with:
The sealing structure helps prevent lubricant leakage and protects internal components from mud, dust and water contamination.
Manufactured according to OEM-style dimensions:
Designed for direct bolt-on replacement after confirming the correct specification.
| Item | Specification / Detail |
|---|---|
| Product Type | Excavator Undercarriage Carrier Roller |
| Machine Model | Komatsu PC400-8 |
| Compatible Models | PC400-8 |
| Machine Type | Crawler Excavator |
| Machine Class | Approx. 40 Ton |
| OEM Part Number | Confirm by machine serial number |
| Material Grade | 40Mn2 Alloy Steel |
| Manufacturing Process | Forging / Casting + CNC Machining |
| Heat Treatment | Induction Hardening |
| Surface Hardness | HRC 52-58 |
| Hardening Depth | 8mm-12mm |
| Seal System | Heavy-duty Floating Oil Seal |
| Lubrication System | Lifetime Internal Lubrication |
| Bearing Structure | Hardened Shaft + Wear-resistant Bushing |
| Quality Inspection | Dimension, Hardness and Sealing Inspection |
| Mounting Configuration | OEM Standard |
| Installation | Bolt-on Direct Replacement |
| Application | Mining / Construction / Heavy Earthmoving |
| Shipping Note | Heavy Component — Sea Freight Recommended |
