Hydrovac - Pre-installation Instructions

You have purchased a remanufactured unit. Give it a chance to do its job. Before installing, you must perform the following maintenance to insure proper life and performance.

Rebuild or Replace Master Cylinder
• If this is not done, drain and flush master cylinder and hydraulic line of old fluid.
• Using hydraulic brake fluid only (do not use solvent for this operation).

Disconnect Vacuum Hose
• From engine intake manifold and inspect hose for collapsed inner wall and fitting for _carbon build up.
• This step is very important as it insures that the booster receives adequate supply
_of vacuum.
• Replace hose and clean fitting and manifold as needed.
• Test vacuum check valve by starting engine while manifold vacuum hose is _connected to the check valve and the hose to booster is disconnected.
• Place vacuum gauge on booster side and shut engine off.
• Vacuum should remain for 30 seconds.
• Replace check valve if it fails this test with our CV-1 check valve kit or equivalent.
• Warranty requests will be refused if gas or oil is in unit (see trouble shooting guide).

Air Cleaner
• Clean air cleaner by blowing out with compressed air or remove it and
_wash it with solvent.
• Dry completely before reinstalling.
• Inspect air cleaner hose for deterioration. Replace as necessary,.
• The air cleaner causes more failures to the booster than any other single factor
_by letting dirt and water enter the unit.

Install Booster
• Connect all lines making sure all fittings are clean.
• Bleed hydraulic system using a pressure bleeder.
• Do not run engine while bleeding hydraulic system. (See "Bleeding Procedures")

Start Engine
• Check brakes for proper operation.


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