3056E Industrial Engine Caterpillar

Illustration 1	g00887110

(1) Backlash (minimum) between the oil pump idler gear and the oil pump gear ... 0.062 mm (0.0024 inch)

Backlash (minimum) between the oil pump idler gear and the crankshaft gear ... 0.095 mm (0.0037 inch)

End play (minimum) for oil pump idler gear ... 0.015 mm (0.0006 inch)

Inside diameter of bearing for oil pump idler gear ... 22.22 to 22.26 mm (0.875 to 0.876 inch)

Outside diameter of idler shaft ... 22.19 to 22.21 mm (0.8736 to 0.8744 inch)

Clearance of the oil pump idler gear bearing on the shaft ... 0.024 to 0.030 mm (0.0009 to 0.0012 inch)

Illustration 2	g00876984

(2) Tighten the bolts for the cover on the engine oil pump to the following torque. ... 28.5 N·m (21.02 lb ft)

Tighten the bolts that fasten the engine oil pump to the front main bearing cap to the following torque. ... 22 N·m (16 lb ft)

Tighten the bolts for the engine oil suction tube to the following torque. ... 22 N·m (16 lb ft)

Type ... Gear-driven differential rotor

Number of lobes

Inner rotor ... 4

Outer rotor ... 5

Illustration 3	g00888637

(3) Clearance of the outer rotor to the body ... 0.15 to 0.34 mm (0.006 to 0.013 inch)

Illustration 4	g00876990

(4) Clearance of inner rotor to outer rotor ... 0.040 to 0.130 mm (0.0015 to 0.0050 inch)

Illustration 5	g00888620

(5) End play of rotor assembly

Inner rotor ... 0.043 to 0.118 mm (0.0017 to 0.0046 inch)

Outer rotor ... 0.031 to 0.106 mm (0.0012 to 0.0042 inch)