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If the power disconnect is out of sight, lock in the open position and tag it to prevent unexpected application of power. Failure to do so could result in fatal electrical shock! 3. Release all pressure within the system before servicing any component. 4. Drain all liquids from the system before servicing. 5. Secure the discharge line before starting the pump. An unsecured discharge line will whip, possibly causing personal injury and/or property damage. 6. Check hoses for weak and worn conditio