Cleaning, Inspection And Repair Of Brake Master Cylinder - Piper Navajo PA-31 Service Manual

PIPER NAVAJO SERVICE MANUAL
214
1 2 34 5
6 7 8
9 10 11 12
13 14 15 16
1. CYLINDER BODY
2. NUT
3. WASHER
4. "O" RING
5. VALVE
6. WASHER
7. SPRING
8. PISTON
9. "O" RING
10. SPRING
11. WASHER
12. ROD
13. "O" RING
14. "O" RING
15. GLAND
16. SNAP RING
Figure 7-17. Brake Master Cylinder Assembly
7-56. CLEANING, INSPECTION AND REPAIR OF BRAKE MASTER CYLINDER.
a. Clean the cylinder parts with a suitable solvent and dry thoroughly.
b.
Inspect the interior walls of the cylinder for scratches, burrs, corrosion, etc.
c. Inspect the general condition of the fitting threads of the cylinder.
d.
Check the piston and valve for scratches, burrs, corrosion, etc.
e. Repairs to the cylinder are limited to polishing out small scratches, burrs, etc., and replacing valve
washer seal and "O" rings.
7-57. ASSEMBLY OF BRAKE MASTER CYLINDER. (Refer to Figure 7-17.)
a. Install "O" ring (9) on the cylinder piston (8). Assemble onto the piston rod (12), the piston (8),
spring (7), washer seal (6) and valve (5). Allow the valve to extend into the base of the piston. Slide the
"O" ring and washer (3) in place and secure with self-locking nut (2).
b. Install "O" ring seal (14) on the packing gland (15). Onto the piston rod (12), slide spring (10),
washer (11), "O" ring (13) and packing gland (15).
c. Dip the piston assembly in fluid (MIL-H-5606) and install the assembly into the cylinder (1).
Push the packing gland into the cylinder until the snap ring (16) can be installed into the annular slot at the
bottom of the cylinder.
Reissued: 10/12/79
LANDING GEAR AND BRAKE SYSTEM
2G8