MM40-107/30-107 COMPONENT MAINTENANCE MANUAL WITH IPL
FOR MAIN WHEEL ASSEMBLY PART NO. 40-107 SERIES AND
MAIN BRAKE ASSEMBLY PART NO. 30-107 SERIES
Page 6
Feb 01/02
CAUTION:
DO NOT PAINT INTERNAL SURFACES OF PISTON BORES.
2.2.4
Inspect pistons (9-40 or 10-40) for nicks or burrs. Remove nicks or
burrs by polishing with 600 grit emery. The final piston large
diameter must not be smaller than
∅
2.121 inch. Thoroughly clean
using available solvent applicable to aluminum before re-installation.
2.2.5
Inspect brake lining for edge chipping and surface deterioration. See
section
3. WEAR LIMITS
.
2.2.6
Lining replacement can be accomplished by using a center punch to
remove the center rivet. Then pry the old segm ents off of the carrier
with a screwdriver. To install new pads, snap the new pad onto the
three carrier pins (9-80 or 10-80), and then attach with new center
rivet (9-75 or 10-75).
NOTE:
If the linings are changed, but the pistons are not removed from the
cylinder, clean the exposed surfaces of the pistons before displacing
the pistons back into the cylinder.
2.2.7
Inspect pressure plate (9-65, 10-65) and back plates (9-90, 10-90) for
cracks or warpage. Replace if cracked or severely deformed.
Inspect pins for looseness. If loose, tighten with Parker Hannifin
Wheel & Brake rivet set and anvil, P/N 199-1A and 199-1B, or replace
back plate and pressure plate assembly.
NOTE:
Slightly warped pressure plates with relief slots can be fixtured in a
vise and straightened when laid on a flat surface; flatness should be
less than .015 inches TIR. Warped pressure plates can cause brake
drag.
2.2.8
Inspect anchor bolt holes in torque plate for internal corrosion or
contamination. If present, clean with emery and apply a light coat of
dry lube.
NOTE:
For best service life, the cylinders must slide freely in the torque plate.
Check the anchor bolt hole and mounting bolt hole areas for
elongation or cracks. Badly elongated or cracked parts should be
replaced with new parts or corresponding part number. Minor
corrosion on the torque plates may be removed with 600 grit emery.
NOTE:
Surfaces from which the protective coating is removed, should be
painted with one coat of zinc chromate primer, and one coat of
aluminum (color) polyurethane.
