Title:
3.8T-6T Upper Track Roller (W21CS41263)
Description:
The Kubota KU-W21CS41263 Upper Track Roller is a genuine OEM undercarriage component designed for Kubota excavators and compact tracked machines in the 3.8 to 6 tonne class. This upper (carrier) roller supports the top section of the rubber track, helping maintain correct track alignment, reduce sag, and ensure smooth, stable travel across uneven or demanding ground conditions.
Manufactured to Kubota’s exact factory specifications, this carrier roller is engineered for durability under continuous vibration, shock loading, and abrasive site environments. It plays a key role in distributing track tension evenly and guiding the track during operation, helping to prevent derailment and premature wear of both the track and undercarriage system.
Regular inspection and replacement of worn upper rollers is essential to maintain efficient machine operation and avoid unnecessary strain on the track chain. Using a genuine Kubota roller ensures correct fitment, reliable performance, and long service life in demanding construction and earthmoving applications.
Model Fitment:
- U45-3
- U45-3 A
- U50-3 A
- KX161-3
- KX161-3 A
- U48-4
- U55-4
- KX057-4
- U50-5
- U56-5
- KX060-5
- KX121-3
- KX121-3 A
- KX042-4
Part Details:
- Part Number: KU-W21CS41263 / W21CS41263
- Part Type: Upper / Carrier Track Roller
- Brand: Kubota Genuine OEM
- Application: 3.8T–6T Kubota tracked machines
- Function: Supports and guides top run of track
- System Role: Undercarriage alignment and load distribution
- Installation Type: Direct-fit OEM replacement
