GUARD AS 3580746 - Caterpillar

L85. Remove the "0 sealing ring from the pump body (where fitted) (Fig. L.8).Inspection
1. Examine all parts for signs of cracking, wear or corrosion.2. Install the inner and outer rotors in the pump body. The chamfered edge of the outer rotor enters the pump body first.
L9
L10
L113. The clearances of a new pump are given on Page B.12 and are checked as shown in Figs. L.9, L.10 and L.11. Should an oil pump be worn to such an extent it adversely affects the working pressure, a replacement pump should be fitted. Parts of the pump are not supplied individually.To Assemble the Oil Pump
1. Fit the drive and driven rotors to the pump body entering the chamfered end of the outer rotor to the body first. Refit end plate using a new "O" sealing ring (where fitted).
L122. Refit the key in the keyway of the drive shaft and refit the drive gear to the shaft. With earlier pumps, the boss on the drive gear was positioned towards the rear of the gear, the flat face of the gear being towards the circlip groove. The correct clearance for the gear was 0.003/0.007 in (0,08/0,18 mm) between the rear face of the gear and the pump body. With current pumps, the boss on the gear is positioned on the front of the gear and the correct clearance for the gear is 1,244/1.264 in (31,60/32,11 mm) when measured from the face of the gear boss to the rear face of the pump mounting flange as shown in Fig. L.12. The minimum clearance between the gear and pump body should be 0.004 in (0,01 mm).3. Fit the drive gear retaining circlip (where fitted). Prime the pump with clean engine lubricating oil before fitting to the engine.To Refit the Oil Pump
1. Fit the oil pump to No. 1 main bearing cap.
L132. Refit the idler gear to the shaft with the recessed face towards the front and secure with the circlip. Check the idler gear end float which should be 0.002/0.016 in (0,05/0,41 mm). Check the backlash between oil pump gear and idler gear which should be 0.006/0.009 in (0,15/0,23 mm) Fig. L.13.3. Refit timing case, timing gears, timing case front cover and crankshaft pulley.4. Refit the oil delivery pipe between the oil pump and pressure relief valve housing.5. Refit the suction pipe to the oil pump.6. Fit the sump strainer to the pump suction pipe, and refit the sump to the engine. Refill the sump with oil of an approved grade. Before starting, crank the engine over using the starter motor with the stop control out until oil pressure is indicated.Oil Pressure Relief Valve
The oil pressure relief valve is contained in a housing bolted to the bottom face of the cylinder block and is set to operate at 50/60 lbf/in2 (3,52/4,22 kgf/cm2) -345/414 kN/m2.To Remove and Dismantle the Relief Valve Assembly
1. Remove the sump.2. Disconnect the oil pump delivery pipe at the relief valve end.
L143. Remove the relief valve housing, later type (Fig. L.14).
L15 1.