Installing Pressure Gauge
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NOTE:
Before connecting pressure gauge, hydraulic accumulator must be depressurized. With ignition off, pump brake pedal a MINIMUM of 20 times using full pedal strokes. When a definite increase in pedal effort is felt, pump pedal 2 more times.
Some diagnostic procedures require that a pressure gauge be connected to the hydraulic unit to read accumulator pressure. See Fig 1 . Pressure gauge must be able to register to 2000 psi (140 kg/cm2 ) and thread securely into adapter. Use the following procedure to install:
- Depressurize accumulator. Remove accumulator from pump body. Take care not to drop the "O" ring seal when removing.
- Install "O" ring on Pressure Gauge Adapter (J-3504-88) and install in pump body. Install pressure gauge. Install second "O" ring between adapter and accumulator. Install accumulator in adapter.
- When removing gauge, depressurize accumulator. Inspect "O" ring seals for cuts or damage. Replace any cut or damaged "O" ring seals.