C4.4 Industrial Engine Engine Oil Pump Caterpillar


Engine Oil Pump
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Type ... Gear-driven differential rotor

Number of lobes

Inner rotor ... 6
Outer rotor ... 7


Illustration 1g00938064
Typical example

(1) Clearance of the outer rotor to the body ... 0.050 to 0.330 mm (0.0020 to 0.0130 inch)



Illustration 2g00938061
Checking the clearance

(2) Service limit of inner rotor to outer rotor ... 0.080 to 0.250 mm (0.0031 to 0.0098 inch)



Illustration 3g00938799
Checking the end play

(3) End play of rotor assembly

Inner rotor ... 0.050 to 0.180 mm (0.0020 to 0.0071 inch)
Outer rotor ... 0.050 to 0.180 mm (0.0020 to 0.0071 inch)


Illustration 4g02501636
Typical example

(4) Tighten the bolts to the following torque. ... 44 N·m (32 lb ft)

(5) Tighten the bolts to the following torque. ... 22 N·m (16 lb ft)

Information System:

C6.6 Industrial Engine Vibration Damper and Pulley - Install
C6.6 Industrial Engine Vibration Damper and Pulley - Remove
MP15, MP20, MP30 and MP40 Multi-Processors Wear Plates - Inspect/Replace
MP15, MP20, MP30 and MP40 Multi-Processors Rotator Head Bolts - Inspect
MP15, MP20, MP30 and MP40 Multi-Processors Rotator Head Bolts - Inspect
C15 and C18 Tier 4 Final Engines Exhaust Cooler (NRS) - Test
MP15, MP20, MP30 and MP40 Multi-Processors Rotator Head Bolts - Check
MP15, MP20, MP30 and MP40 Multi-Processors Rotator Head Bolts - Check
MP15, MP20, MP30 and MP40 Multi-Processors Rotator Head Bolts - Check
C13 Tier 4 Final Engines Exhaust Cooler (NRS) - Clean
2010/05/06 Improved Remanufactured Injectors Are Now Used on Some 3408E and 3412E Machine Engines {1251, 1254, 1290, 1713}
2010/05/20 An Improved Hydraulic Tank is Available for Certain Excavators {5056}
C6.6 Industrial Engine Crankshaft Front Seal - Remove and Install
C6.6 Industrial Engine Crankshaft Front Seal - Remove and Install - Crankshaft Front Seal for Heavy Duty Front Cover
C6.6 Industrial Engine Gear Group (Front) - Remove and Install
C6.6 Industrial Engine Gear Group (Front) - Remove and Install - Heavy Duty Gear Group (Front)
C6.6 Industrial Engine Idler Gear - Remove
C6.6 Industrial Engine Idler Gear - Install
C6.6 Industrial Engine Housing (Front) - Remove
C6.6 Industrial Engine Housing (Front) - Remove - Heavy Duty Housing (Front)
2010/05/13 The Gas Strut on Backhoe Loader Steering Columns Has Been Improved {4309, 4310, 4338}
C6.6 Industrial Engine Housing (Front) - Install
C6.6 Industrial Engine Housing (Front) - Install - Heavy Duty Housing (Front)
C6.6 Industrial Engine Accessory Drive - Remove and Install - Accessory Drive SAE "A"