PUMP GP-GEAR 9D6610 - Caterpillar

Oil Pump
Operation
The gear-type positive displacement oil pump is mounted on the oil manifold. The pump furnishes oil at all times to cool, lubricate and actuate the marine gear.The pump is driven by a shaft splined to the clutch drive spider of the marine gear. The drive spider rotates any time the diesel engine is running and in the same engine direction. When it is desired to change a marine gear from a clockwise rotation to a counterclockwise rotation (as viewed from the front of the engine) it is necessary to make the following changes.1. Remove the oil pump as outlined in the covering topic. Rotate it 180° and replace the pump on the oil manifold using the holes provided.2. The plug inside the cover assembly must be removed from its position and placed in the hole in the high pressure side of the pump. The plug must always be in the high pressure side, regardless of pump rotation.3. A new oil pump inlet tube is needed to allow for the difference in height of the oil pump inlet connection. A new outlet hose may be needed if the original hose will not reach the oil pump outlet connection at its new position.Oil Pump Removal and Installation
1-Outlet hose. 2-Oil pump. 3-Inlet flange.1. Remove the bolts securing the oil pump inlet flange (3) to the strainer retainer.
REMOVING OIL PUMP.
4-Oil pump inlet tube. 5-Oil pump drive sleeve.2. Inspect the gasket behind the oil pump and replace if necessary.3. Remove the oil pump inlet tube (4) from the oil pump.4. Inspect the oil pump drive sleeve (5) and replace if worn or damaged.5. Install in reverse order of removal using a new O-ring seal on the oil pump inlet tube.Disassembly and Assembly
1-Cover assembly. 2-Plate. 3-Pump body.1. Separate the parts evenly so as not to damage them.
2-Plate. 4-Drive gear assembly. 5-Plate. 6-Bearings. 7-Driven gear assembly.2. Inspect the bearings (6) and replace if worn or damaged.
DISASSEMBLING OIL PUMP
4-Drive gear assembly. 5-Plate. 8-Lock rings. 9-Bearings. 10-Driven gear. 11-Shaft.3. Inspect the bearings (9) and replace if worn or damaged.
DISASSEMBLING DRIVE ASSEMBLY
8-Lock ring. 12-Gear. 13-Lock ring. 14-Shaft. 15-Key. The gears (10) and (12) are a slip fit on the shafts (11) and (14).4. Remove the lock ring (8) and gear (12) from the shaft (14) as shown. The gear (10) can be removed in a similar manner.5. When assembling, be sure that the key (15) is aligned with the keyway and the lock ring is firmly seated in the mating groove in the shaft.6. Inspect the plates (2) and (5) for excessive wear and replace if necessary.
OIL PUMP PLATES
16-Oil relief grooves. When assembling the oil pump, be sure the plate with the oil relief grooves (16) is placed between the head assembly and the pump body. The grooves face the pump gears.Selector Valve
The selector control valve assembly is mounted on the marine gear and directs the flow of oil and also regulates the oil pressure being delivered to the marine gear. The pressure regulating section of the