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Home >> Nissan-Datsun >> 1989 >> Sentra Base >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc & Drum >> Testing >> Power Brake Unit Test >> Notes

Power Brake Unit Test: Notes

Manufacturer does not recommend disassembly of this unit. After air-tight and operational tests, if problem is determined to be in power brake unit, complete assembly must be replaced. Do not disassemble power brake unit.

NOTE: Determine whether source of problem is in power brake unit or check valve. Before reaching final conclusion, inspect check valve.
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