SPRING AS-GAS 1439434 - Caterpillar

Firing order (injection sequence), 3306 Engine ... 1, 5, 3, 6, 2, 4Firing order (injection sequence), 3304 Engine ... 1, 3, 4, 2
A. Part number of fuel injection pump and governor group. B. Identification number on housing. C. Location of part number marks on camshaft. Early camshafts had no part number marks on the camshafts. All 4 cylinder camshafts without part number marks at location (C) are 4N4312. If the part number of the fuel injection pump and governor group is not in the chart or if it has a different camshaft, make reference to the parts book, or to TECHNICAL PARTSGRAM; COMMON USAGE IN SLEEVE METERING FUEL SYSTEMS, 4 and 6 PUMP GROUPS, Form No. FEG00707. Torque for bolt in hole for timing pin ... 108 36 lb. in.(12.2 4.1 N m)Torque for bolts that hold governor weight carrier to camshaft ... 90 10 lb. in.(10.2 1.1 N m)(1) Diameter of rear bearing surface (journal) of the camshaft (new) ... 2.3720 .0005 in.(60.249 0.013 mm) Bore in the rear bearing for the camshaft (new) ... 2.3750 .0005 in.(60.325 0.013 mm)Maximum permissible clearance between the bore in the housing and the sleeve control shaft (worn) ... .003 in.(0.08 mm)(2) Diameter of sleeve control shaft (new) ... .3530 .0003 in.(8.966 0.008 mm) Bore in the housing for the fuel control shaft (new) ... .3543 .0005 in.(8.999 0.013 mm)Maximum permissible clearance between the bore in the housing and the sleeve control shaft (worn) ... .003 in.(0.07 mm)(3) End play for camshaft with sleeve installed (new) ... .023 .018 in.(0.58 0.46 mm) When installing sleeve on end of camshaft, support the camshaft to prevent damage to parts inside of injection pump and governor housing.(4) Diameter of front bearing surface (journal) of the camshaft (new) ... .9990 .0005 in.(25.375 0.013 mm) Bore in the front bearing for the camshaft (new) ... 1.0005 .0005 in.(25.413 0.013 mm)Maximum permissible clearance between the bearing and the camshaft bearing surface (journal) (worn) ... .003 in.(0.08 mm)
Install spring washer with bent side towards the governor spring (5) as shown.(5) Governor spring: Make reference to the chart "GOVERNOR SPRINGS."For the correct part number for the governor spring for the fuel injection pump and governor group, make reference to the following: Parts book, RACK SETTING INFORMATION, TECHNICAL PARTSGRAM; COMMON USAGE IN SLEEVE METERING FUEL SYSTEMS, 4 and 6 PUMP GROUPS, Form No. FEG00707. If the engine has "surging", install the 6N6901 Governor Conversion Group For Close Regulation ("Dashpot" Governor). Special Instruction, Form No. SMHS6762 has instructions for the installation procedures. (6) Bypass valve: If the spring keeps the pressure in the fuel injection pump housing above 25 psi (170 kPa) with the engine operating under full load, the spring is good.Pressure of fuel in housing for fuel injection pumps, (Full Load) ... 30 5 psi(205 35 kPa) Install guide pin (A) to depth (B) [.642 .003 in.