HONDA 2002-2004 GL1800/A Linked Braking System (LBS) Proportional Control Valve (PCV) Leakage

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Filed Under (Honda) by admin on 25-11-2010

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1. Pump the rear brake pedal four times. •If the brake pedal feels spongy, bleed the brake system per the Service Manual. After verifying proper brake system operation, proceed to step 2 below. •If the brake pedal does not feel spongy, proceed to step 2 below. 2. Place the motorcycle on its side stand, with the handlebars in the full left position . Lock the handlebars. 3. Place a scissor jack directly under the left front brake caliper as shown in the illustration. To avoid damage to the caliper, place a protective piece of rubber (such as a piece of inner tube) between the caliper and the jack. Wind up the jack until the front wheel is approximately 15 mm off the ground. 4. Measure the distance from the secondary master cylinder piston mounting bolt to the edge of the secondary master cylinder body (rod length of the secondary master cylinder). Record this measurement . • If the measured length is 30.3 mm, replace the PCV per the Service Manual. (This length indicates the unit’s secondary master cylinder is fully stroked, which means there is no hydraulic brake pressure acting on the PCV.) After replacing the PCV, proceed to the IDENTIFICATION section of this Service Bulletin. •If the measured length is longer than 30.3 mm , proceed to step 5 below. • INSPECTION/REPAIR PROCEDURE Record this measurement. Pump the rear brake pedal four times.
GL1800/A #16 ©2005 American Honda Motor Co., Inc. – All Rights Reserved 3 of 6 FEBRUARY 2005 5. Wait 30 minutes. Do not disturb the motorcycle in any way during this time. 6. Measure the distance again from the secondary master cylinder piston mounting bolt to the edge of the secondary master cylinder body (rod length of the secondary master cylinder). •If the measurement has decreased more than 1 mm from the measurement you recorded, proceed to step 7 below. •If the measurement is within 1 mm of the measurement you recorded, the PCV is OK. Proceed to the IDENTIFICATION section of this Service Bulletin. 7. Check the PCV for leakage. • If the PCV is leaking , replace the PCV per the Service Manual. After replacing the PCV, proceed to the IDENTIFICATION section of this Service Bulletin. • If the PCV is not leaking , you must diagnose the brake system problem before proceeding. After you have diagnosed and repaired the brake system, proceed to the IDENTIFICATION section of this Service Bulletin. NOTE: Any brake system problem not related to the PCV that is found while performing this Service Bulletin is not covered by this Safety Recall. If the motorcycle’s original factory warranty is still in effect or under HPP, file a normal warranty claim. If the unit is outside its factory warranty period or HPP coverage, contact TechLine for goodwill consideration. 8. Verify proper front and rear brake operation by pumping the front brake lever and rear brake pedal before riding the motorcycle

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