Switch Accessories, Duthie Power Services with 50 Years in Generator Maintenance, Rental, Sales, Repair and Transfer Switches for all of Southern California. Engine repairing and rebuilding services including diesel engine overhaul and repair services. All types of fire pump diesel engines can be overhauled and repaired. Services also include preventive maintenance, diagnostic and rental services. Emergency power restoration and repair services are available 24 hours a day, 365 days a year; Additional Engine Rebuilding & ...