PUMP GP-GEAR 4559314 - Caterpillar

Remove cover (2) and spring (7). Remove O-ring seal (6), retainer (8), and oil filter elements (9) .
Clean cover (2), spring (7), O-ring seal (6), and retainer (8). Clean the inside of the oil filter housing.
Caterpillar oil filters are built to Caterpillar specifications. Use of an oil filter not recommended by Caterpillar could result in severe engine damage to the engine bearings, crankshaft, etc., as a result of the larger waste particles from unfiltered oil entering the engine lubricating system. Only use oil filters recommended by Caterpillar.
Ensure that the new oil filter elements are in good condition. Install the new oil filter elements.
Inspect the O-ring seal. Ensure that the surfaces for the O-ring seal are clean. Install a new O-ring seal if the old O-ring seal is damaged or deteriorated.
Install retainer (8), spring (7) and cover (2). Ensure that the retainer and the spring are properly seated between the oil filter elements and the cover.
Start the engine according to this Operation and Maintenance Manual, "Starting The Engine" procedure (Operation Section). Check for oil leaks.Replacing the Engine Oil Filters During Engine Operation
If the engine is equipped with duplex oil filters, the engine oil filter elements can be changed while the engine is in operation. This procedure is useful if the oil filter elements require more frequent replacement than the engine oil.
This filter contains hot, pressurized oil that can cause burns and fire hazards, which may result in bodily injury or death. Follow the instructions given in this Operation and Maintenance Manual and stop the engine if rapid air movement exists to blow the oil.
Warning: Vapor Explosion. May cause serious injury or death. Read the Operation and Maintenance Manual before conducting any maintenance on the duplex oil filter.
Open the "FILL" valve for a minimum of 5 minutes in order to fill the oil filter elements that will not be serviced. The oil filters that will not be serviced must be full of engine oil. Close the FILL valve.
Move the control valve to the "AUX RUN" position in order to change the main oil filter elements. Move the selector valve to the "MAIN RUN" position in order to change the auxiliary oil filter elements.
Allow the oil pressure gauge for the oil filter that is being changed to reach a "ZERO" pressure reading.
Perform Step 1 through Step 8 of "Replacing the Engine Oil Filters With the Engine Stopped".
Open the "FILL" valve for a minimum of 5 minutes in order to fill the new oil filter elements.
Close the "FILL" valve. Rotate the control valve to the "RUN" position for the oil filter that was serviced.Fill the Crankcase
If the engine is equipped with an auxiliary oil filter system, extra oil must be added when filling the crankcase. If equipped with an auxiliary oil filter system that is not supplied by Caterpillar, follow the recommendations of the OEM.
Engine damage can occur if the crankcase is filled above the "FULL" mark on the oil level gauge (dipstick).An overfull crankcase can cause the crankshaft to dip into