Mini Excavator Rubber Tracks
KBL PC12UU-2E Rubber Tracks —250×52.5×76 Pair
Two-track replacement set for Komatsu PC12UU-2E, 250 mm width, 52.5 mm pitch and 76 links per belt.
KBL D-PC12UU-2E-0741N
Mini Excavator Rubber Tracks
Huanball HB637 Rubber Track —350×54.5×86 for Kubota KX040-4 / KX121-3
HB637 is Huanball’s 350 mm-wide replacement rubber track with 54.5 mm drive pitch and 86 links. Its manufacturer model list includes KX040-4 and KX121-3 / 3S / 3ST. Rubber, steel cores and reinforcing cord form one continuous belt.
- Model / Part No.
- Huanball HB637 / 350×54.5×86
- Component / application
- Kubota KX040-4 and KX121-3 / 3S / 3ST
- Width
- 350 mm
Huanball HB637 / 350×54.5×86 Specifications
| Model / part number | Huanball HB637 / 350×54.5×86 |
|---|---|
| Supplied brand | Huanball |
| Manufacturer model | HB637 |
| Track size W×pitch×links | 350×54.5×86 |
| Width | 350 mm |
| Pitch | 54.5 mm |
| Links | 86 |
| Machine entries | Kubota KX040-4 / KX121-3 / 3S / 3ST |
| Construction | Rubber and alloy steel with reinforcing cord |
| Order unit | One track |
KX121-2 and KX121-3 have different track identities
The earlier KX121-2 / 2S entry RD101-22314 uses 350×84×56. The KX121-3 / 3S / 3ST OE entry RD118-22310 uses 350×54.5×86. Their similar 350 mm width does not describe the same drive pitch and count.
| Machine | OE number | Width×pitch×links |
|---|---|---|
| KX121-2 / 2S | RD101-22314 | 350×84×56 |
| KX121-3 / 3S / 3ST | RD118-22310 | 350×54.5×86 |
The supply model and original part number have different jobs
HB637 identifies the Huanball replacement. RD118-22310 and RD158-22310 identify the original KX121-3 and KX040-4 track entries respectively. Keep the selected manufacturer, belt size and inner drive/guide shape together on the order.
Count the belt and rolling components separately
One product unit is one continuous track. A matched pair is two units. Sprockets, rollers, idlers and tensioning parts are separate repair lines with their own machine numbers.
Purchase Options & Service Parts
Purchase options
- One HB637 belt
- Two matching belts for a pair
- Selected inner guide/drive configuration with old track code
- PE-film/pallet shipment
Service & replacement parts
- Sprocket by installed machine part number
- Bottom rollers
- Front/rear idlers and tensioner parts
Huanball HB637 / 350×54.5×86 Buying Questions
Does350 mm width identify the entire belt?
The 54.5 mm drive pitch, 86-link count and inner guide/drive profile also define the selected belt.
Is HB637 an original Kubota part number?
It is the Huanball manufacturer model. The original Kubota numbers remain separate identification entries.
How many units are needed for a pair?
Two matching HB637 belts.
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