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Message: <blockquote data-quote="daytona701" data-source="post: 125727" data-attributes="member: 18244"><p>Bought the factory service manual. Could oil light could be high oil pressure? Manual says could be too high viscosity or pressure relief stuck closed. Changed oil/filter using Shell Rotella 15w40. While oil filter was off checked pressure relief valve and ball moved easily against spring. Machine has about 1050 hrs. Currently have oil pressure sensor unplugged with manual gauge installed. Oil pressure at idle shows 60psi going up to 70psi at half throttle. Parking brake engages by itself while machine is working. Battery terminals are clean and tight with 12.6 volts at rest and about 14.5 engine on. Changed alternator and belt last week. Checked wire harness for break in insulatio. Could common ground to oil sensor circuit and parking brake solenoid be causing the two problems?</p></blockquote><p></p>