Skylark L4-138 2.3L DOHC VIN D MFI QUAD 4 (1989)
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Remove proportioner valve cap assemblies.
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Remove "0" rings.
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Remove springs.
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Remove proportioner valve pistons.
CAUTION: Use needle nose pliers with care not to scratch or otherwise damage piston stems.
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Remove proportioner valve seals from pistons.
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Inspect proportioner valve pistons for corrosion, or deformation and replace if found.
5.
Depress primary piston and remove retainer.
6.
Plug primary fluid outlet (outlet nearest to cowl when master cylinder is installed), then apply compressed air into secondary fluid outlet to remove
primary and secondary pistons.
7.
Remove spring retainer and seals from secondary piston.
8.
Inspect master cylinder bore for corrosion.
NOTE: Do not use abrasive material on master cylinder bore. Replace if bore is corroded.
