3306B GENERATOR SET ENGINE Caterpillar

Oil Pump

Usage:

Remove & Install Oil Pump

Start By:

a. remove oil pan

Fluid Spillage Containment

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to "Tools And Shop Products Guide", NENG2500 for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose fluids according to local regulations and mandates.

1. Remove bolt (2) that holds suction bell (4) to the oil pan plate.

2. Remove bolts (1) that hold the oil pump to the scavenge tube. Remove the gasket. Bend the locks away from bolts (3). Remove bolts (3) that hold the suction tube to the oil pump. Remove the gasket from between the suction tube flange and the oil pump.

NOTE: The suction tube, suction bell and oil pump can be removed as a unit.

3. Bend the locks away from bolts (6) that hold the oil pump to the cylinder block. Remove bolts (6).

4. Remove oil pump (5). The weight of the oil pump is approximately 14 kg (30 lbs).

NOTE: The following steps are for the installation of the oil pump.

5. Put oil pump (5) in position under the cylinder block. Install a new gasket between the oil pump and the scavenge tube. Install bolts (1) that hold the oil pump to the scavenge tube.

6. Install bolts (6), the washers and the locks that hold the oil pump to the cylinder block.

7. Put suction bell (4) in position on the oil pump. Make sure there is a new gasket between the flange on the oil tube and the oil pump.

8. Install bolts (3) that hold the suction tube to the oil pump. Bend the locks against the bolts. Install the bolt that holds the bracket on the suction bell to the oil pan plate. Install bolt (2).

End By:

a. install oil pan

Disassemble Oil Pump

Start By:

a. remove oil pump

Fluid Spillage Containment

1. Remove idler gear (2). Remove the bearing from the idler gear with Tooling (B).

2. Remove suction bell (1).

3. Remove the bolt and the washer from the oil pump drive gear.

4. Remove the drive gear from the shaft with Tooling (A).

5. Remove the key from the pump shaft.

6. Remove bolts (3) from the pump body.

7. Remove body (8), two gears (7), the keys and spacer (4) from the pump.

8. Remove two shafts (5) and the gears.

9. Remove bolts (6), the cover and the pressure relief valve from the body.

10. Remove the bearings from the oil pump body assembly and the scavenge pump body assembly with Tooling (B).

Assemble Oil Pump

1. Install the bearings in the scavenge pump body assembly with Tooling (B) and a press as follows:

a. Put bearings (9) in position on the inside of the scavenge pump body assembly with the chamfer on the bearing toward the outside of the pump body. Install the bearing until it is 1.52 mm (.060 in) below the inside machined surface of the scavenge pump body assembly. Make sure the joints in the bearings are at an angle of 30 ± 15 degrees from the center line through the bores in the scavenge pump body and toward the outlet passage of the pump. The outlet passage has a cavity between the bearing bores.

2. Install the bearings in oil pump body assembly with Tooling (B) and a press as follows:

a. Put bearings (10) in position on the inside of the oil pump body assembly with the chamfer on the bearings toward the outside of the pump body. Install the bearings until they are even with the outside of the pump at an angle of 30 ± 15 degrees from the centerline through the bearing bores and toward the outlet passage of the pump. The outlet passage has a cavity between the bearing bores.

3. Check the condition of the relief valve. Check the condition and specifications for all the parts of the oil pump before it is assembled. See the topic "Oil Pump" in the Specifications Manual.

4. Put clean engine oil on all the parts of the oil pump.