Cutlass Ciera V6-3300 3.3L MFI VIN N (1993)
PROPORTIONER VALVE REMOVAL
1. Remove proportioner valve caps (2).
2. Remove proportioner valve cap "0" rings (3) and discard.
3. Remove proportioner valve piston springs (4).
4. Remove proportioner valve pistons (5).
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Use needle nose pliers with care not to scratch or otherwise damage piston stems.
5. Remove proportioner valve seals (6) from proportioner valve pistons (5).
CLEAN
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All parts in clean, denatured alcohol.
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Dry with unlubricated compressed air.
INSPECT
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Proportioner valve pistons (5) for corrosion, or deformation and replace if found.
DISASSEMBLY OF MASTER CYLINDER
1. Depress primary piston (17) while depressing piston retainer (18).
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Take care not to damage the primary piston, master cylinder bore, or piston retainer groove.
2. Remove primary piston (17), secondary piston (15), secondary piston spring (12), and spring retainer (13).
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To remove parts, apply low pressure unlubricated compressed air into upper outlet port at blind end of bore with all other outlet ports plugged.
3. Remove secondary seal (16), primary seal (14), and spring retainer (13) from secondary piston (15).
CLEAN
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All parts in clean, denatured alcohol.
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Dry with unlubricated compressed air.
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No abrasives should be used in bore.
INSPECT
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Master cylinder bore for scoring or corrosion. If noted, replace master cylinder.
Assembly
