The PowerStop PBK126 is a pin boot and bushing kit for the caliper guide pins on the 2020-2022 Ram 3500, the rubber boots and bushings that seal the sliding pins against road grime while letting the caliper float. It is a practical refresh for a pad and rotor service, since you can renew the slide points instead of reinstalling tired hardware. Long-tail searches it fits: 2020-2022 Ram 3500 caliper pin boot kit, PBK126 brake guide pin bushing, Ram 3500 HD slide pin rebuild. Lack of lube plus dirt, moisture and heat may cause a pin to seize, and a seized pin leaves the pad dragging and wearing unevenly, so replacing worn boots is cheap insurance on a heavy-duty truck that tows.
Buying a fresh kit makes more sense than reusing old boots when the caliper is already off the bracket. The manufacturer's brake guidance stresses supporting the caliper during work: always support the caliper and never allow it to hang from the brake hose. Monitor the brake fluid reservoir level while compressing the caliper pistons to make sure it does not overflow. For pin boots, owners on user forums recommend a socket sized to seat on the metal flange so the rubber is not torn, with the metal bores cleaned with brake cleaner and dried with compressed air before the new boot goes in.
Owners on user forums note that caliper pin kits usually include new pins alongside the boots, but the contents of the PBK126 were not confirmed in our research. Check the packaging or ask the manufacturer before the install so you know whether the old pins can be reused.
The manufacturer's brake service guidance calls for a caliper piston compressor or C-clamp for the pad and caliper work. For the boots themselves, owners on user forums recommend a socket that seats on the metal flange, a hammer, and a light coat of brake grease on the boot edges.
This is a moderate DIY job that suits someone already comfortable with a pad and rotor swap on a heavy-duty truck. Remove the two caliper guide pin bolts, support the caliper with a hanger rather than letting it dangle from the hose, and pull the old boots and pins. Clean the bores, then press the new boots in squarely with a socket and a hammer, tapping evenly so the boot does not cock at an angle. Use only brake system grease, apply it sparingly, and keep it off the pad friction surfaces. Have a C-clamp or piston compressor on hand, and watch the reservoir level when you push the piston back.
