Oil Level

High or low; correct as required

Vacuum Line

Leaking, pinched, disconnected, or cut

Modulator

Leaks or damaged diaphragm (A bent modulator will not function correctly)

Modulator Valve

Nicked, scored, or cut valve

Oil Pump Assembly

Pressure Regulator Valve or Springs

Nicked or scored valve; damaged springs

Pressure Relief Valve

Damaged spring; missing ball