Cleaning, Inspection And Repair Of Brake Assembly; Standard Brake Assembly - Piper Dakota Maintenance Manual

b. Align cylinder body over anchor bolt. (Refer to figure 32-11, step B.)
c. Use a suitable arbor press and apply pressure on spot face directly over anchor bolt hole. (Refer to
figure 32-11, step C.)
CLEANING, INSPECTION, AND REPAIR OF BRAKE ASSEMBLY
1. Clean assembly with a suitable solvent and dry thoroughly.
2. Check wall of cylinder housing and piston for scratches, burrs, corrosion, etc., that may damage O-
rings.
3. Check general condition of brake bleeder screw and lines.
4. Check brake disc for grooves, scratches, or pits. Minimum thickness of 164-20 disc used on 40-86B
wheel assembly is 0.205. For 164-22A disc used on 40-90A wheel assembly, minimum thickness is
0.345. (Refer to figure 32-12.) A single groove or isolated grooves up to 0.031 of an inch deep do not
necessitate replacement, but a grooving of entire surface will reduce lining life and lining should be
replaced. If a heat crack exceeding 0.800 of an inch in length of if crack depth exceed 0.210 of an inch,
disc must be replaced. If crack depth is not measurable, replace disc if crack length exceeds 0.400 of
an inch. Should any heat crack extend into welded seam between flange and cup, replace it
immediately. If it is necessary to remove the wheel disc, refer to Removal and Disassembly of Main
Wheel.
5. Remove lining from backing plates by drilling or punching out the old rivets, and installing a new set
using proper rivets and a rivet set that will properly stake lining and form a correct flare of rivet. A
rivet setting kit is available through Piper dealers under Part Number 754 165.
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
Figure 32-9. Standard Brake Assembly (Cleveland 30-55)
2C8
32 - 43 - 00
Page - 32-20
Reissued: August 1, 1986