rear brake caliper piston OD

[MaxMav]

What is the OD of the piston for a 2023 Ford Maverick rear brake caliper? I need to replace my badly scored/rusted rear rotors and pads(yes I live in the NE). I have a proper brake caliper tool for a VW so I'm guessing I'll need to fabricate an adapter plate to fit the maverick piston slots. A picture showing the piston and retraction slots would be great. The front brakes are fine. I was able to get a set of rear rotors and pads from Detroit Axle for a great price before the tariffs kicked in. I've had good luck with their products in the past.

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[Msradke]

Need to put parking brake in service mode and just put the piston in. believe info in owners manual.

 

[MaxMav]

Yes, I know that but then the piston must be screwed back into the caliper body before new pads and rotors can be fitted.

 

[XLT 4k Cactus Gray]

Yes, I know that but then the piston must be screwed back into the caliper body before new pads and rotors can be fitted.

Wrong

 

[Msradke]

No. After putting system in service mode , the piston will just push in. Per shop manual.

 

[MaxMav]

Wrong

Have you done a rear brake job on a maverick? If so how did you get the piston back in?

 

[MaxMav]

so just finger pressure is required to push the piston back in?

 

[MaxMav]

No. After putting system in service mode , the piston will just push in. Per shop manual.

 

[MaxMav]

well that's good to know. I'll be doing the brake job early next week. thanks

 

[HeyBales]

Finger strength - eh. Thumb - eh.
Use the same tool you used on the front - push straight in.

Not sure if that VW tool is too specific, or you think a normal generic tool and using old pad is not specific enough.
Manual does say NOT to use a C-clamp, as you can damage the EPB component on the back.

 

[MaxMav]

Thanks, my vw caliper tool is a typical type screw-in tool with a nut with "nubs" that fit into the slots on the pistons. The nut Is attached to the main screw with an allen set screw and fit many vw calipers. I used it when we had a vw egolf and Passat TDI and fabricated an adapter nut that worked on chevy volts. All required the piston to be screwed in to retract. I also made a flat faced pad that fits the nut to compress front caliper pistons so I'll use that.

 

[HeyBales]

Installation
1. NOTICE: Do not use a C-clamp to compress the brake caliper piston or damage to the parking brake actuator motor may occur.
NOTICE: Do not manually retract the piston or damage to the parking brake actuator may occur.
NOTICE: Make sure that the brake hose is not twisted when installing the brake caliper or damage to the brake flexible hose may occur.
NOTICE: Use care when pushing the caliper piston into the caliper piston bores or damage to components may occur.
Compress the brake caliper piston until the piston bottoms out in the brake caliper bore.

 

[Maverick123]

Aren't the rear caliper pistons electrically retracted? You need to put them into service mode, or disconnect the electrical connector and retract them with jumper wires and a 9v battery

 

[BlueSpec1]

I'll review these posts when I have to do mine:
Maverick - Brake job without going into brake maintenance mode
FORSCAN freezing during EPB maintenance mode program: A possible solution

 

[HeyBales]

Aren't the rear caliper pistons electrically retracted? You need to put them into service mode, or disconnect the electrical connector and retract them with jumper wires and a 9v battery

No to electronically retracted for new pads.

Yes to service mode (so the EBB doesn't fire off), and disconnect the EPB module (so it doesn't fire off).

I posted the instructions on the install part, not the remove part. Because several posts already mentioned the 2 items.

That picture is from the service manual - stating and showing pressing in the piston.

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