10 General Information 20-2 Engine and Tractor Tune-up Model 2120 Tractor TM-4252 (Dec-70) ENGINE TUNE-UP-Continued Service Specifications Reference AIR INTAKE SYSTEM Oil-bath air cleaner - clean oil cup and fill with fresh engine oil to "Full" mark F®S _ bJ Operator's manual and "Fundamentals of Service, Engine" manual. Dry -type air cleaner - clean filter element and dust unloading valve F®S Operator's manual and "Fundamentals of Service, Engine" manual B Check crankcase vent tube for foreign particles (restriction) Tighten cylinder head cap screws 110 ft.lbs. (15 mkg) Section 20, group 10 Check and adjust valve clearance Intake valve 0.014 in. (0.35 mm) Outlet valve 0.018 in.
(0.45 mm) Section 20, group 10 Thoroughly clean wires, connec¬ tions and batteries BATTERIES Tighten cable clamp screws Liberally coat battery terminals and cable connectors with petroleum jelly Check specific gravity of electrolyte Operator's manual Check electrolyte level of battery Operator's manual GENERATOR (ALTERNATOR) Check fan belt tension 3/4 in.
(19 mm) deflection with 20 lbs (9 kg) force Section 20, group 35 FUEL SYSTEM Check fuel tank and lines for leaks or restriction Clean screen of fuel transfer pump Operator's manual Check first stage filter element and replace, if necessary Section 30, group 10 Check injection timing and adjust, if necessary Section 30, group 15 Bleed fuel system Section 30, group 15 Section 20, group 40 Check engine speeds and adjust speed control linkage, if necessary Printed in Germany