Impreza Sedan AWD F4-1820cc 1.8L SOHC (1993)
Brake Master Cylinder: Service and Repair
Disassembly
PRECAUTIONS FOR DISASSEMBLING
1) Remove mud and dirt from the surface of brake master cylinder.
2) Prepare tools necessary for disassembly operation, and arrange them neatly on work bench.
3) Clean work bench.
4) Tools for disassembly operation:
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1 Phillips screwdriver
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1 C-ring pliers
DISASSEMBLING PROCEDURE
1) Remove supply valve stopper. (only vehicle equipped with A.B.S.)
2) Remove C-ring with C-ring pliers pushing in primary piston slightly.
NOTE: Piston may jump out from master cylinder.
3) Extract primary piston assembly and secondary piston assembly.
CAUTION:
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Do not disassemble the piston assembly; otherwise, the spring set value may be changed.
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Use brake fluid or methanol to wash inside wall of cylinder, pistons and piston cups. Be careful not to damage parts when washing. If
methanol is used for washing, do not dip rubber parts, such as piston cups, in it for more than 30 seconds; otherwise, they may become
swelled.