Part number: 331/32806
Alternative numbers: 232/54000, 332/W3498, 331/61309, 333/T5808
Type: Bottom / track roller
Manufacturer: High-quality aftermarket replacement
Machine class: 2.5 – 3.5 ton mini excavators
The 331/32806 bottom roller is a critical undercarriage component designed for JCB mini excavators 802, 803 and 804. Its primary function is to support the machine’s weight and guide the track chain smoothly along the undercarriage frame. This component operates under extreme conditions, constantly exposed to shock loads, abrasion, moisture and dirt.
Thanks to its robust construction and sealed design, the roller ensures long service life and reliable performance even during heavy-duty operation. A properly functioning bottom roller prevents uneven track wear and protects other undercarriage components from excessive stress.
Function and failure diagnostics:
Bottom rollers carry the full weight of the machine and maintain track stability. Failure of a single roller quickly accelerates wear of the entire undercarriage.
Common symptoms of wear:
⚠️ Safety warning:
Working on tracked undercarriage components is extremely hazardous. Before replacing the roller, the track tensioner must be released, and the machine must be securely supported on certified stands. Failure to follow safety procedures can result in serious injury.
Application in machines
|
Brand
|
Type / Series / Model
|
|
JCB |
Mini Excavators: 802, 802 Super, 802.4, 802.4 Super, 802.7, 802.7 Plus, 802.7 Super, 8025ZTS, 8027Z, 803, 803 Magnum, 803 Plus, 803 Super, 8030ZTS, 8032Z, 8035ZTS, 804, 804 Plus, 804 Super |
The list above is for reference. It is crucial to verify the OEM part number or roller dimensions.
Data sheet
Specific References






The 331/32806 bottom roller is a critical undercarriage component designed for JCB mini excavators 802, 803 and 804. Its primary function is to support the machine’s weight and guide the track chain smoothly along the undercarriage frame. This component operates under extreme conditions, constantly exposed to shock loads, abrasion, moisture and dirt.

















