How to Change Rear Brake Pads on Triumph Bonneville

Helps you change the rear brake pad set on a Triumph Bonneville.

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How to Change Rear Brake Pads on Triumph Bonneville
54 Steps
Supplies
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1
Put the motorcycle on center stand or paddock stand

Put the motorcycle on center stand or paddock stand

2
Use 5mm allen key to loosen the pad retaining pins

Use 5mm allen key to loosen the pad retaining pins

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3
Loosen the pad retaining pins by turning anti clockwise

Loosen the pad retaining pins by turning anti clockwise

4
Loosen the pins but do not remove them yet

Loosen the pins but do not remove them yet

5
8mm hex bit for removing the mounting bolts ( it could be a normal bolt from manufacturing- I had changed my caliper mounting bracket hence the hex bolt )

8mm hex bit for removing the mounting bolts ( it could be a normal bolt from manufacturing- I had changed my caliper mounting bracket hence the hex bolt )

6
Use the 8mm hex bit and loosen the bolts alternatively

Use the 8mm hex bit and loosen the bolts alternatively

7
Loosen the bolts alternatively and remove them.

Loosen the bolts alternatively and remove them.

8
Remove the bolts

Remove the bolts

9
Removing the second one

Removing the second one

10
Twist the caliper against yourself

Twist the caliper against yourself

11
Twist the caliper towards yourself and the caliper will come loose

Twist the caliper towards yourself and the caliper will come loose

12
Removed rear caliper

Removed rear caliper

13
Clean the rotor using a rough or medium sand paper with random hand movement ( don't over do this or use extreme force ). Warning- Be extremely  careful with your hand.

Clean the rotor using a rough or medium sand paper with random hand movement ( don't over do this or use extreme force ). Warning- Be extremely careful with your hand.

14
Remove the loosened retaining pins

Remove the loosened retaining pins

15
Pull the second retaining pin out, you may have to push the pads inward of the caliper to get the pins out

Pull the second retaining pin out, you may have to push the pads inward of the caliper to get the pins out

16
My worn out rear caliper ( slightly over used :-(

My worn out rear caliper ( slightly over used :-(

17
Use hot soap water and clean the caliper

Use hot soap water and clean the caliper

18
Push the pistons together inward to clean the caliper. ( Take care not to push one piston at a time, to avoid the other one popping out and fluid to spill, leading to complete fluid line rebuild )

Push the pistons together inward to clean the caliper. ( Take care not to push one piston at a time, to avoid the other one popping out and fluid to spill, leading to complete fluid line rebuild )

19
Use a small flat screwdriver to pop the pad spring upwards

Use a small flat screwdriver to pop the pad spring upwards

20
This is the flat spring that pushes the pad for alignment and retention

This is the flat spring that pushes the pad for alignment and retention

21
Clean the flat spring thoroughly with cleaning fluid ( I use WD40 )

Clean the flat spring thoroughly with cleaning fluid ( I use WD40 )

22
Remove the locator post and clean it

Remove the locator post and clean it

23
Grease the guide poles

Grease the guide poles

24
Clean thoroughly and wait for the caliper to dry. Wipe down and spray very little WD40 to displace water and lubricate the unit. Wipe off extra lubricants and cleaning fluids

Clean thoroughly and wait for the caliper to dry. Wipe down and spray very little WD40 to displace water and lubricate the unit. Wipe off extra lubricants and cleaning fluids

25
Align the flat spring back ( note the way it goes in - the small hook that retains the flat spring is towards the pistons )

Align the flat spring back ( note the way it goes in - the small hook that retains the flat spring is towards the pistons )

26
The two small arrow like upward bends help keep the two pads separate

The two small arrow like upward bends help keep the two pads separate

27
Push both pistons together inside as much as you can ( Important - if you push one piston at a time, you risk the other piston popping out of the bore, which leads to full hydraulic fluid loss )

Push both pistons together inside as much as you can ( Important - if you push one piston at a time, you risk the other piston popping out of the bore, which leads to full hydraulic fluid loss )

28
Use a new pad - shown here is the inside pad

Use a new pad - shown here is the inside pad

29
Keep it in the caliper

Keep it in the caliper

30
Push it flush onto the pistons

Push it flush onto the pistons

31
Align the pad to the pistons as shown

Align the pad to the pistons as shown

32
Hook the second pad in the guide hook

Hook the second pad in the guide hook

33
And rotate it inwards, note the two arrow like hooks of the flat spring should keep this pad towards the outside of caliper

And rotate it inwards, note the two arrow like hooks of the flat spring should keep this pad towards the outside of caliper

34
Clean the retaining pins with a smooth to medium sand paper

Clean the retaining pins with a smooth to medium sand paper

35
Do this step very gently. Note this step is to clean the hardened salts on the pin and not to remove metal of the pins. After cleaning, rub the surface with grease.

Do this step very gently. Note this step is to clean the hardened salts on the pin and not to remove metal of the pins. After cleaning, rub the surface with grease.

36
You need to push the pads to align them to get a through hole so the retaining pins can be guided in

You need to push the pads to align them to get a through hole so the retaining pins can be guided in

37
Retaining pins guided in and ready to be tightened

Retaining pins guided in and ready to be tightened

38
Use the 5mm allen and hand tighten to reasonable strength. Don't over tighten, we shall be doing that using a torque wrench after mounting the caliper back on the bracket.

Use the 5mm allen and hand tighten to reasonable strength. Don't over tighten, we shall be doing that using a torque wrench after mounting the caliper back on the bracket.

39
Hand tighten the retaining pins

Hand tighten the retaining pins

40
Push the pads aside and relocate the caliper onto the mounting brackets

Push the pads aside and relocate the caliper onto the mounting brackets

41
Use thread locker on the mounting bolts. ( After cleaning the bolts with cleaning solvent )

Use thread locker on the mounting bolts. ( After cleaning the bolts with cleaning solvent )

42
Tighten the bolts alternatively

Tighten the bolts alternatively

43
Tighten the bolts alternatively until tight with one hand ( do not use your body weight and over tighten these bolts )

Tighten the bolts alternatively until tight with one hand ( do not use your body weight and over tighten these bolts )

44
Use nail polish remover and clean off the old torque marking paint

Use nail polish remover and clean off the old torque marking paint

45
Clean the paint that marks the torqued bolt

Clean the paint that marks the torqued bolt

46
Rear brakes mounting bolts are torqued at 40Nm and the retaining pins at 18Nm

Rear brakes mounting bolts are torqued at 40Nm and the retaining pins at 18Nm

47
Use a torque wrench and gradually torque to 40Nm by moving through 30Nm, 35Nm. ( It is a good habit to torque up gradually, rather than jumping directly into the factory value )

Use a torque wrench and gradually torque to 40Nm by moving through 30Nm, 35Nm. ( It is a good habit to torque up gradually, rather than jumping directly into the factory value )

48
Reached 40Nm for both mounting bolts

Reached 40Nm for both mounting bolts

49
Start at 15Nm and reach 18Nm for the retaining pins

Start at 15Nm and reach 18Nm for the retaining pins

50
Torquing the retaining pins

Torquing the retaining pins

51
After all bolts and pins are torqued, use a bright coloured nail polish to mark the torqued bolts

After all bolts and pins are torqued, use a bright coloured nail polish to mark the torqued bolts

52
Final step, all torqued and marked

Final step, all torqued and marked

53
Start the motorcycle and run in gear and press the pedal, the first pedal push will be completely loose. The pads will align as soon as you pump the fluids in the line using the foot pedal.

Start the motorcycle and run in gear and press the pedal, the first pedal push will be completely loose. The pads will align as soon as you pump the fluids in the line using the foot pedal.

54

Wear a helmet and go for a test ride, for the first 100km the brake pads have not set in correctly, so don't use aggressive braking, ride slow and run in the pads.

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