Brake Pads Front, Replacement

Brake pads front, replacement

Special tools:
115 8147 TORQUE SOCKET 1/2" 19 MM 115 8147 Torque Socket 1/2" 19 mm

Minimum thickness
Replacement point = 3.0 mm (0.12")

Preparations
- Remove wheel.

Removing brake caliper and brake pads




- Remove retaining spring (3) carefully to avoid deforming it.
- Remove protective caps (1) from the two locating pins (2).
- Remove both locating pins, using 7 mm (0.276") hexagonal socket.

- Remove brake caliper carefully from mounting so as not to damage brake hose.
- Remove brake pads.
- Suspend brake caliper from a steel wire in front spring to avoid damaging hose.

Note! Do not depress brake pedal while brake pads are removed.

Cleaning and checking




- Clean brake pad contact surfaces in brake caliper and on caliper mounting.
- Check piston dirt guard.
- If dirt guard looks worn, replace it as a precautionary measure.
- If dirt guard is damaged, overhaul brake caliper as per Brake caliper front, overhaul Brake Caliper Front, Overhaul.

Note! If dirt guard is damaged, dirt may have penetrated into the cylinder and so the brake caliper needs to be overhauled.

Checking brake disc




- Check brake disc friction surface.
- If brake disc shows signs of being skew, check its lateral run-out as per Measuring lateral run-out on brake disc Measuring Lateral Run-Out on Brake Disc.
- If brake disc shows signs of major wear, variations in thickness etc., replace it as per Brake disc front, replacement Brake Disc Front, Replacement.

Note! Disc thickness = replacement point = 23.0 mm (0.9"). Minimum recommended disc thickness when installing new brake pads = 23.8 mm (0.94").

Installation of items

Installation of locating pins
- Check locating pin rubber bushings. Replace as necessary
- Grease locating pins with Volvo silicon grease (PN 116 1325-4) and insert them in rubber bushings (4). Pin should slide easily into bushings.

Installation of brake caliper and brake pads
- Push piston back in cylinder on brake caliper.
- Check that dirt guard is positioned correctly.





- Install new brake pads and install brake caliper.
- Tighten locating pins to 30 Nm (22 ft.lb) and install protective caps.
- Install retaining spring (3).

Finishing and checking
- If brake hose was not unscrewed, go to Checking brake fluid level.
- If brake hose was unscrewed, tighten brake hose onto brake caliper to 18 Nm (13 ft.lb)

Note! Make sure that hose is not twisted. There is a white line running along the hose which shows if the hose is twisted. Correct at other end of hose if necessary.

- Top up and bleed braking system as per. Then continue as below.

- Check that there are no leaks and that brakes are working properly.

Checking brake fluid level
- Push brake pedal down a few times.
- Check level in brake fluid reservoir. Top up brake fluid if necessary.

Installation of wheel




- Make sure that brake discs and ring contact surfaces are clean.
- Grease hub center rim guide with anti-rust agent 116 1038-3.
- Install wheel
- Tighten bolts hand tight. Then tighten them crosswise to 110 Nm (80 ft.lb) If using airgun, use torque socket 115 8147 TORQUE SOCKET 1/2" 19 MM 115 8147 Torque Socket 1/2" 19 mm.

Note! Tightening bolts crosswise to a specific torque setting is important in preventing stresses in the brake disc.