DROVE MOTORHOME FOR 1.25 HRS. TO DELIVER FOR REPAIR OF GENERATOR WHICH WAS NOT WORKING. UNIT APPROXIMATELY 8 MONTHS OLD - STILL UNDER WARRANTY. ON ARRIVAL AT DEALER, ATTEMPTED TO PUT DOWN HYDRAULIC JACKS. FIRE STARTED IN ENGINE COMPARTMENT AREA FROM LEAK ON HYDRAULIC LINE THAT BROKE DUE TO DESIGN DEFECT. THIS WAS CONFIRMED ON 10-5-04 BY INSURANCE ADJUSTER INSPECTOR. UNIT HAD PREVIOUS PROBLEMS WITH THE HYDRAULIC JACK SYSTEM, STARTING ON 4-30-04 TO PRESENT.*AK