Inspecting, overhauling, adjusting and testing equipment and associated devices such as earth boring machines, cranes, tractors, forklift bucks, compressors, power mowers; power saws, oil filters, pneumatic tools, pumps and fans and other portable equipment, and all types of hydraulic tools, equipment and controls; repairing gas pumps, electric doors and other ship and garage equipment. Inspecting, overhauling and adjusting equipment such as brake systems and associated equipment, differential assemblies, power take-off s and associated equipment, radiators and cooling systems, automatic transmissions and fl uid couplings, no-spin differentials, multi-wheel drive assemblies and associated equipment, wheel assemblies, shock absorbers and chassis stabilizers, and carburetor and fuel injection systems.