37 Machinery installation, maintenance and repair, refurbishment, rebuilding and overhauls of machinery, replacement, remanufacturing, rebuilding and overhauls of machinery parts such as front and rear-axle assemblies, machine coupling and transmission components, transmissions, transmission gears for machines, differentials and gears including ring gears such as planetary ring gears and sun pinion, drive gears, planet gears, spur sun gears and helical sun gears, worm and wheel drives, double helicals, planet carrier, mill pinion, mill girth gear, worm wheel assembly and ring, shaft assembly, worm shaft, helical pinion, gear rack and pinion assembly, cluster gears, slew pinion, double helical gear, drill head gear boxes, industrial solution mixer components for mining, gearboxes including industrial gear boxes, shafts and pulleys, conveyor parts such as pulleys and rollers, chain tracks and parts thereof, ground engaging traction gears, bushes being parts of engines and motors, camshafts, cable-control units for controlling cable actuated equipment for earth moving and other purposes, replacement parts for backhoe and shovel excavators including machine elements such as frame upper carriages, monoblock boom mounts, stick backhoe mountings, bucket assembly, arm assembly, swing device, hydraulic actuators, hydraulic-control units for controlling hydraulically actuated equipment for earth-moving and other purposes, hydraulic booms, engine rebuild kits including bearings, bushings, exhaust manifold sleeves, studs, fasteners, pistons, piston crowns and skirts, pins, valve cover seal, oil and fuel filters, connecting rods, cylinder head, fuel injectors, water pump, oil pump, oil pan isolator assemblies, liners, rings, and seals, and tools for installing the foregoing engine parts, hydraulic and pneumatic controls, drives, controls (as far as included in this class) for hydraulic support units and drive systems, transmission chains and power chains, cylinder heads for engines, cylinder liners, cylinders for machines, cylinders for motors and engines, drilling bits being parts of machines, drilling heads being parts of machines, power drills, axles for machines, ball rings for bearings for machines, bearing brackets for machines, engine bearings, brake linings for machines other than for vehicles, brake segments for machines, brake shoes for machines, lubricating systems parts, hammers being parts of machines, hydraulic hammers, lubricating pumps, lubricators being parts of machines, machine fly wheels, pistons for motors, pulleys being parts of machines, crank shafts for engines, engine camshafts, engine bearings, hydraulic apparatus for use in moving work tools attached to vehicles and not for engines or motors, namely, hydraulic drives, hydraulic gears, hydraulic pumps, and hydraulic shock absorbers, axles for machines, ball rings for bearings for machines, bearing brackets for machines, engine bearings, brake linings for machines, brake segments for machines other than for vehicles, brake shoes for machines, blower units and assemblies, planetary gearboxes, reduction drives, speed increaser, speed reducers, and parts, tools, attachments, accessories and equipment associated with all of the herein goods and included in this class