| 1. |
Inspect each brake drum and determine
if brake drums can be refinished. Discard remain within maximum
allowable diameter after refinish specification. |
| 2. |
With tire and wheel assemblies removed,
measure diameter of each of brake drums. |
| 3. |
Inspect each brake drum for excessive
surface wear and/or radial runout. |
| 4. |
If brake drums can be refinished, proceed
with rotor refinishing procedure. |
| 5. |
Thoroughly clean any corrosion/rust
from brake drum flange using rotor/drum flange resurfacing kit tool
No. J-41013, or equivalent, if required. |
| 6. |
Mount brake drum to brake lathe according
to lathe manufacturers instructions. |
| 7. |
Ensure that any vibration dampening
attachments are securely in place. |
| 8. |
With brake lathe running, slowly bring
in cutting tool until it just contacts brake drum friction surface. |
| 9. |
Observe witness mark on brake drum.
If witness mark extends approximately 3/4 or more of way around
brake drum surface, brake drum is properly mounted to lathe. |
| 10. |
If witness mark does not extend 3/4
or more of way around brake drum, mount brake drum to lathe. |
| 11. |
Refinish brake drum following brake
lathe manufacturers instructions. |
| 12. |
After each successive cut, inspect
brake drum diameter. |
| 13. |
If at any time brake drum exceeds maximum
allowable diameter after refinish specification, brake drum must
be replaced. |
| 14. |
Follow brake lathe manufacturers recommended
speed setting for applying a non-directional finish. |
| 15. |
Apply non-directional finish, using
moderate pressure, as follows: |
| |
a. |
If lathe is equipped with a non-directional
finishing tool, apply finish with 120 grit aluminum oxide sandpaper. |
| |
b. |
If lathe is not equipped with a non-directional
finishing tool, apply finish with a sanding block and 150 grit aluminum
oxide sandpaper. |
| 16. |
After applying a non-directional finish,
clean friction surface of brake drum with denatured alcohol or an
equivalent brake cleaner, and wipe friction surface using a clean
shop towel, to remove metal particles remaining from machining.
Repeat cleaning process, if required, to remove all metal particles. |
| 17. |
Remove brake drum from brake lathe. |
| 18. |
Thoroughly clean any corrosion from
wheel bearing flange using hub cleaning kit tool No. J-42450-A,
or equivalent, if required. |
|
Brake Drum R&R
Brake Hydraulic Systems Drain, Refill & Bleed