Hydraulic Control Assembly - Antilock Brakes: Service Precautions
WARNING: THE ONLY PARTS OF THE HYDRAULIC CONTROL UNIT (HCU) THAT ARE SERVICEABLE ARE THE RELAY BOX, THE PROPORTIONING VALVES, AND THE HCU MOUNTING BRACKET. THE REMAINING COMPONENTS OF THE HYDRAULIC CONTROL UNIT HCU ARE NOT SERVICEABLE ITEMS. NO ATTEMPT SHOULD EVER BE MADE TO REMOVE OR SERVICE ANY OTHER PARTS OF THE HYDRAULIC CONTROL UNIT HCU.