Welcome back:
Honestly, the manual doesn't indicate the bolt size. However, most likely it will either be a 13mm or 14mm. As far as replacement, here is a link that shows how it is done in general:
https://www.2carpros.com/articles/how-to-replace-front-brake-pads-and-rotors-fwd
Here are the directions specific to your vehicle for inspection and replacement. The attached pictures correlate with these directions.
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FRONT DISC BRAKE PAD CHECK AND REPLACEMENT
see pic 1
NOTE: The brake pads have indicators that contact the brake disc when the brake pad thickness becomes 2 mm (0.08 inch), and emit a squealing sound to warn the driver.
CAUTION:
Whenever a pad must be replaced, replace both LH and RH wheel pads as a set to prevent the vehicle from pulling to one side when braking.
If there is a significant difference in the thicknesses of the pads on the left and right sides, check the sliding condition of the piston and slide pins.
see pic 2
1. Check the brake pad thickness through the caliper body check port.
Standard value: 10.0 mm (0.39 inch)
Minimum limit: 2.0 mm (0.08 inch)
CAUTION: Do not wipe off the special grease that is on the lock pin or allow it to contaminate the lock pin.
see pic 3
2. Remove the lock pin bolt. Pivot the caliper assembly and hold it with wires.
see pic 4
3. Remove the following parts from caliper support.
1. Pad assembly or Pad and wear indicator assembly
2. Pad assembly
3. Clip
4. Outer shim
5. Inner shim
4. In order to measure the brake drag force after pad installation, measure the rotary-sliding resistance of the hub with the pads removed.
5. Install the pads and caliper assembly, and then check the brake drag force.
Once you remove the old brake pads, I strongly recommend removing the hardware clips and taking a file to remove any dirt or rust where the clips sit. If rust develops there, it will cause the pads to become locked in the mount and cause sticking and premature wear. Once you do that, then reinstall the clips. They should be clean and lubricated. Make sure the pads move freely in the mount.
Let me know if this helps or if you have other questions.
Joe
Images (Click to make bigger)
Wednesday, January 23rd, 2019 AT 5:32 PM