Undercarriage of VOVOL EC700 Carrier Roller Assembly HT75 FIAT-HITACHI 71499210 HITACHI 4349518 HITACHI 9078675 HITACHI 9134126 ITM C7670000M00 JOHN DEERE AT318030 TELCO-TATA 9078675 VOLVO 14531515 VPI 4349518
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Product Specifications
Carrier Roller (also known as a Top Roller or Bogie Wheel) is a crucial component of an excavator's undercarriage. On a large machine like the Volvo EC700, which is a 70-ton class excavator, these rollers are built to withstand immense stress and are critical for durability and efficient operation.
Key Features of the Volvo EC700 Carrier Roller Assembly
Heavy-Duty Construction: Designed for the high weight and powerful forces of the EC700, these rollers are typically made from high-strength, forged, or cast alloy steel.
Sealed and Lubricated: Most modern carrier rollers, including those for Volvo, are sealed and lubricated (SALT/Lube). This means the roller bearings are permanently sealed and packed with grease, protecting them from dirt, water, and contaminants. This design significantly extends the service life compared to older, unsealed designs.
Mounting Bracket: The assembly includes a robust bracket that bolts directly to the excavator's main frame (the track frame).
Flanges: The roller has flanges on one or both sides to keep the track chain's link height (the "guide lugs") centered on the roller.
Typical Volvo Part Number Example:
While the exact part number can vary depending on the specific EC700 model year and serial number, a common format for a complete carrier roller assembly might look like this: HT75;14531515
It is absolutely essential to confirm the correct part number using your machine's serial number before ordering. You can do this through the Volvo Construction Dealer portal (VOPA) or by providing your serial number to a dealer/parts supplier.
Signs of a Worn or Failing Carrier Roller
Visible Flange Wear: The flanges that guide the track become noticeably worn down, thin, or even broken.
Abnormal Noise: A rumbling, grinding, or squealing sound coming from the top of the track when the machine is moving.
Track Misalignment: The track chain may start to rub against the track frame or other components because the roller is no longer guiding it properly.
Failure to Rotate: The roller seizes up and does not turn. This causes rapid, severe grinding wear on both the roller itself and the track chain links.
Grease Leakage: If the seal is damaged, you may see grease being flung onto the track frame or the inside of the track.
Consequences of Ignoring a Bad Carrier Roller:
A failed carrier roller can lead to accelerated wear on the track chain, main idler, and sprocket—components that are far more expensive to replace than a single roller.
Replacement & Maintenance Tips
Replace in Pairs: It is highly recommended to replace both carrier rollers (left and right sides of the machine) at the same time, even if only one is bad. This ensures even track tension and balanced performance.
Inspect the Track Chain: When replacing a carrier roller, it's an excellent time to inspect the entire undercarriage for wear, especially the link height that runs against the roller's flanges.
Use Correct Bolts and Torque: The mounting bolts are under high stress. Always use the correct grade of bolt and tighten them to the manufacturer's specified torque.
Check Alignment: After installation, ensure the roller is correctly aligned and that the track runs smoothly over it.
Where to Source a Volvo EC700 Carrier Roller Assembly
DPW PARTS also can manufacturer volvo mining heavy machinery EC700 undercarriage components OEM&aftermarket below:
- Volvo EC700 Track shoes assembly 48Links 650MM
- Volvo EC700 Track link assembly Volvo 700 track chain 48Linsk
- Volvo EC700 Track shoes 650MM BERCO KM3201/650 HITACHI 2039879 HITACHI 4218739 ITM Z7670200N0650V SUMITOMO KUA0194 VOLVO 14522596
- Volvo EC700 track bolts of shoes HITACHI 3076901 HITACHI 4218740 ITM D7670000N15 VOLVO 14522607 VOLVO 14525773 VPI V4218740
- Volvo EC700 track Nuts of shoes HITACHI 3076904 HITACHI 4218741 ITM D7670000N17 VOLVO 14522606 VOLVO 14525774 VPI V4218741
- Volvo EC700 Carrier rollers Volvo 700 Top rollers BERCO HT75 FIAT-HITACHI 71499210 HITACHI 4349518 HITACHI 9078675 HITACHI 9134126 ITM C7670000M00 JOHN DEERE AT318030 TELCO-TATA 9078675 VOLVO 14531515 VPI V4349518V
- Volvo EC700 Sprocket 21Teeth 30Holes ITM R9365000M01 VOLVO 14532544 VOLVO VOE14532544
- Volvo EC700 front idlers ITM P9365400M00 VOLVO 14525744 VOLVO VOE14525744
