Komatsu Backhoe Brake Parts

Komatsu Backhoe Brake Parts parts list
Fits Model	Description	Details	Price	Product Details
See Details	TBD	Outer Brake Piston	CA0380401	$65.00	View Info
See Details	TBD	Brake Disc, Outer	CA0148488	$98.00	View Info
See Details	TBD	Brake Disc, Inner	CA0148487	$64.00	View Info
See Details	TBD	Brake O-Ring	CA0143837	$38.00	View Info
See Details	TBD	O-Ring, Brake Piston - External	CA0142207	$28.00	View Info
See Details	TBD	Outer Brake Piston	CA0148631	$65.00	View Info

Replacement brake components for Komatsu backhoe loaders, including inner and outer brake disc plates, brake pistons, and brake sealing O-rings for the wet disc brake systems used across Komatsu backhoe models.

Fits Models At A Glance

WB Series: WB140, WB150, WB146, WB156
WB Series (continued): WB93, WB97

Key Notes

Application: Wet disc brake service and repair on Komatsu backhoe axles
Part Types: Inner and outer brake disc plates, brake pistons, brake piston carrier and piston O-rings
Sealing: External and internal brake O-rings to reseal piston housings
Sold: As individual components so you order only what your repair needs

Why Choose Broken Tractor

✅ Individual brake parts for targeted repairs
✅ Genuine Komatsu part numbers for correct fitment
✅ Fast shipping from two US locations

Frequently Asked Questions

What brake parts do you carry for Komatsu backhoes?

We carry inner and outer brake disc plates, inner and outer brake pistons, and the O-rings that seal the brake piston carrier and pistons. These cover the wet disc brake system used on Komatsu backhoe loaders. You can order each piece separately based on your repair.

How do I know which brake disc plate I need for my Komatsu backhoe?

The inner brake disc plate (CA0148487) and outer brake disc plate (CA0148488) are separate parts within the brake pack. Match your Komatsu part number to confirm the correct plate, since the inner and outer positions use different components. If you are unsure, our parts team can help you identify the right one at (800) 909-7060.

Why are my Komatsu backhoe brakes dragging or not releasing?

Worn brake disc plates or failed piston O-rings are common causes of brakes that drag or fail to release fully. Damaged O-rings on the brake piston or carrier can prevent proper piston movement. Broken Tractor offers the disc plates, pistons, and O-rings needed to reseal and rebuild the brake assembly.

Are the brake pistons different for the inner and outer positions?

Yes, the outer brake piston is a distinct part (CA0148631 and CA0380401 are outer piston options), so confirm the position before ordering. Match the Komatsu part number to your machine to be sure you get the correct piston.