3304B & 3306B INDUSTRIAL & MARINE ENGINES Caterpillar

Oil Pump (3306)

Usage:

Remove & Install Oil Pump (3306)

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 PRODUCT 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 the bolt and lock that holds suction bell (1) to the oil pan plate. Remove two bolts (4) that hold the elbow to the oil pump.

Show/hide table

Oil pump idler gear (2) can fall off the pump when the pump is removed. To prevent injury, always hold the gear on the pump when the pump is removed.

2. Remove the bolts and locks that hold the oil pump to the engine. Remove oil pump (3).

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

3. Install idler gear (2) on oil pump (3). Put the oil pump in position on the engine as shown with idler gear (2) engaged with the crankshaft gear. Install the bolts and locks that hold the oil pump to the engine.

4. Install bolts (4) that hold the elbow to the oil pump.

5. Install the bolt and lock that hold suction bell (1) to the oil pan plate.

End By:

a. install oil pan

Disassemble Oil Pump

Start By:

a. remove oil pump (3304) or remove oil pump (3306)

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 (A) and a press as follows:

a. Put bearings (1) 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 (A) and a press as follows:

a. Put bearings (2) 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 body. Make sure the joints in the bearings are 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.