C7.1 Engines for Caterpillar Built Machines Caterpillar

Number of lobes

Inner rotor ... 6

Outer rotor ... 7

Illustration 1	g00938064
Typical example

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

Illustration 2	g00938061
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 3	g00938799
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 4	g03346216
Typical example (4) Suction Pipe

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