PUMP GP-GEAR 1789178 - Caterpillar

Camshaft rotation is clockwise in view shown.Firing order (injection sequence) ... 1, 5, 3, 6, 2, 4Injection timing before TC (top center): Precombustion Chamber (PC) ... 10 1°Direction Injection (DI) with 7N1256 Fuel Injection Pump Group ... 28 1°Direction Injection (DI) with 7N4369 or 8N5533 Fuel Injection Pump Group ... 26.5 1°(1) Torque for bushing: 2M4314 ... 205 14 N m (153 10 lb ft)7E5085 ... 160 14 N m (120 10 lb ft) (5) Bore for the rack and diameter of the rack: Bearing at the rear (after assembly) ... 12.746 0.046 mm (.5018 .0018 in)Bearing at the front (after assembly) ... 12.758 0.046 mm (.5023 .0018 in)Diameter of rack (new) ... 12.662 0.005 mm (.4985 .0002 in)Maximum permissible clearance between rack and bearings (worn) ... 0.18 mm (.007 in)(6) Bore in bearings for the camshaft (after assembly) ... 53.988 0.038 mm (2.1255 .0015 in) Diameter of bearing surfaces of the camshaft (new) ... 53.899 0.013 mm (2.1220 .0005 in)Maximum permissible clearance between the bearings and the camshaft ... 0.25 mm (.010 in) Make reference to Special Instruction, Form No. SEHS7292 for information on testing fuel injection nozzles.(9) Torque for the nuts that hold the fuel injection lines to the nozzles ... 40 7 N m (30 5 lb ft)(10) Torque for the nuts that hold the nozzles ... 75 7 N m (55 5 lb ft)(11) Body.(12) Nozzle. Tighten nozzle finger tight on body (11).(13) Put liquid soap (40% solid) in the bore in the cylinder head and on the O-ring seal. Put 5P3931 Anti-Seize Compound on the threads before installation. Torque for precombustion chamber or adapter ... 205 14 N m (150 10 lb ft)(14) Put 5P3931 Anti-Seize Compound on the threads before installation. Torque for glow plug ... 14 3 N m (10 2 lb ft)