Test 1 - Pump Test

CAUTION: In order to ensure accurate test results, repeat each test that relies on a hydraulic pressure reading before continuing with the test procedure or condemning a component.

1. Depressurize power hydraulic system on 1988-89 model years by pumping brake pedal 18 - 20 times, until pedal becomes hard.

Test Gauge Connection For Valve Block:

2. Connect test gauge and adaptor to valve block.

3. Start engine and allow hydraulic pressure to stabilize (approximately 1 minute).

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TEST 1