Eaton 8 kW Air-cooled Owner's Manual

Also see for 10 kW Air-cooled: Owner's manual

26To check valve clearance:The engine should be cool before checking. If valve clearance is•0.002" - 0.004" (0.05 - 0.1mm) , adjust m ent is not needed.R e move spark plug wires and position wires away from plugs.•R e move spark plugs.•Make sure the piston is at Top D ead Center (TD C ) of its com-•pression stroke (both valves closed ) . To get the piston at TD C,re move the intake screen at the front of the engine to gainaccess to the flywheel nut. Use a large socket and socketwrench to rotate the nut and hence the engine in a clockwisedirection. While watching the piston through the spark plughole. The piston should move up and down. The piston is atTD C when it is at its highest point of travel.To adjust valve clearance (if necessary), (Figure 4.9):Make sure the engine is at 60° to 80° F.•Make sure that the spark plug wire is re moved from the spark•plug and out of the way.R e move the four screws attaching the valve cover.•Loosen the rocker ja m nut. Use an 10mm allen wrench to turn•the pivot ball stud while checking clearance between the rockerar m and the valve ste m with a feeler gauge. Correct clearanceis 0.002-0.004 inch (0.05-0.1 mm) .NOTE:Hold the rocker arm jam nut in place as the pivot ballstud is turned.When valve clearance is correct, hold the pivot ball stud in placewith the allen wrench and tighten the rocker ar m ja m nut. Tightenthe ja m nut to 174 in/lbs. torque. After tightening the ja m nut,recheck valve clearance to m ake sure it did not change.Install new valve cover gasket.•R e-attach the valve cover.• Figure 4.9 - Valve Clearance AdjustmentJam NutPivot BallStudRockerArmValveStemNOTE:Start all four screws before tightening or it will not bepossible to get all the screws in place. Make sure thevalve cover gasket is in place.Install spark plugs.•R e-attach the spark plug wire to the spark plug.•On the GT-530 and GT-990/999, repeat the process for the•other cylinder.4.8 COOLING SYSTEMAir inlet and outlet openings in the generator compart m ent mustbe open and unobstructed for continued proper operation. Thisincludes such obstructions as high grass, weeds, brush, leavesand snow.W ithout sufficient cooling and ventilating air flow, the engine/gen-erator quickly overheats, which causes it to quickly shut down.(S ee Figure 4.10 for vent locations. )Make sure the doors and roof are in place during operation asrunning the generator with the m re moved can effect cooling airmove m ent. The exhaust from this product gets extremelyhot and remains hot after shutdown. High grass,weeds, brush, leaves, etc. must remain clear ofthe exhaust. Such materials may ignite and burnfrom the heat of the exhaust system.Figure 4.10 – Cooling Vent LocationsThe maximum ambient temperature for the gen-erator is 25° C (77° F).Section 4 — MaintenanceAir-cooled Generators