3208 TRUCK ENGINE Caterpillar


Oil Pump

Usage:

Oil Pump

Oil Pump

Check oil pump end clearance. End clearance is .0027 to .0053 in. (0.069 to 0.135 mm) new.


CHECKING END CLEARANCE (Oil pump with plunger bypass shown)

Remove oil pump cover mounting bolts (1). Remove oil pump cover (2).


OIL PUMP (Oil pump with belleville washer bypass shown)
1. Bolts (four). 2. Oil pump cover.


CHECKING ROTOR TIP CLEARANCE

Check oil pump rotor tip clearance. Rotor tip clearance is .005 ± .003 in. (0.13 ± 0.08 mm). Maximum rotor tip clearance is .011 in. (0.28 mm).

Remove outer rotor (5) and inner rotor (3). Check size of bearing (4). Size of bearing (4) is 2.8041 ± .0022 in. (71.224 ± 0.056 mm). Replace bearing if necessary. Use an 8S2285 Driver (6) to install the bearing. For the correct location of bearing junction, see the topic OIL PUMP in the SPECIFICATIONS.


ROTORS REMOVED
3. Inner rotor. 4. Bearing. 5. Outer rotor.


INSTALLING BEARING
6. 8S2285 Driver.

Clean all parts thoroughly before installing. Oil all component parts before installing. Install inner rotor (3), outer rotor (5), cover (2), mounting bolts (1) and locks. Tighten bolts to 18 ± 5 lb. ft. (24 ± 7 N·m) and secure with locks.

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