3408B and 3408C Industrial and Marine Engines Caterpillar


Engine Oil Pump

Usage:

3408B 1LG


Illustration 1g03320866


Illustration 2g03320884

Table 1
Specification for 4N-8734 Engine Oil Pump Gp 
Item  Qty  Part  Specification Description 
When the pump drive is viewed from the drive end, the rotation is Counterclockwise. 
Before operation, the pump must be lubricated with clean engine oil and the pump must turn freely by hand. 
1W-7240 Gear  Length of the gear is 79.375 ± 0.025 mm (3.1250 ± 0.0010 inch).
Depth of bore for the gear is 79.502 ± 0.020 mm (3.1300 ± 0.0008 inch)
2S-2760 Spring  Length under test force is 117.14 mm (4.612 inch).
Test force is 499 ± 24 N (112 ± 5 lb).
Free length after test is 152.91 mm (6.020 inch)
4N-5273 Pump Drive Shaft  Diameter of pump drive shaft is 22.217 ± 0.005 mm (0.8747 ± 0.0002 inch).
Bore in the 7C-6498 Oil Pump Cover for bushing for pump drive shaft is 22.258 ± 0.008 mm (0.8763 ± 0.0003 inch)
4N-5271 Pump Drive Shaft  Diameter of pump drive shaft is 22.217 ± 0.005 mm (0.8747 ± 0.0002 inch).
Bore in the 7C-6498 Oil Pump Cover for bushing for pump drive shaft is 22.258 ± 0.008 mm (0.8763 ± 0.0003 inch)
7N-2156 Bushing  Install the bushings, so that the bushings are even with the outside of the oil pump body.
Angle from the centerline of the oil pump body to the bushing joint of the bushing is 30 ± 15 degrees. 
Installation depth of bushing in the oil pump housing is 0.30 ± 0.25 mm (0.012 ± 0.010 inch)
8M-8489 Dowel  Extension of the dowel after installation is 6.4 ± 0.5 mm (0.25 ± 0.02 inch)

Caterpillar Information System:

793B Off-Highway Truck Air System and Brakes Control Valve (Hoist)
824G , 825G and 826G Landfill Compactor Engine Oil Sample - Obtain
938G Wheel Loader and IT38G Integrated Toolcarrier Braking System Parking Brake Limit Switch
793B Off-Highway Truck Air System and Brakes Oil Filter (Parking Brake Release)
793B Off-Highway Truck Air System and Brakes Oil Filter (Rear Brake Cooling)
793B Off-Highway Truck Air System and Brakes Air Control Valve (Window Wiper)
631E Series II, 633E Series II and 637E Series II Wheel Tractor-Scrapers Air System and Brakes Check Valve (Primary Air Tank)
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Torque Converter
14H and 16H Motor Graders Hydraulic and Steering System Steering System
938G Wheel Loader and IT38G Integrated Toolcarrier Braking System Service Brakes
793B Off-Highway Truck Air System and Brakes Pump Drive
793B Off-Highway Truck Air System and Brakes Gear Pump (Hoist and Rear Brake Cooling) - Single Section
938G Wheel Loader and IT38G Integrated Toolcarrier Braking System Hydraulic Tank and Filter
793B Off-Highway Truck Air System and Brakes Traction Control Valve
793B Off-Highway Truck Air System and Brakes Pressure Switch (Service Brake and Retarder)
561M Pipelayer Engine Starting
793B Off-Highway Truck Air System and Brakes Temperature Sender (Brake Oil)
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Temperature Sender (Torque Converter Oil)
793B Off-Highway Truck Air System and Brakes Temperature Switch (Brake Oil)
793B Off-Highway Truck Air System and Brakes Pressure Switch (Brake Air)
Cold Weather Recommendations for All Caterpillar Machines Battery Information
Cold Weather Recommendations for All Caterpillar Machines Tire Inflation Information
938G Wheel Loader and IT38G Integrated Toolcarrier Power Train Transmission Oil Pump
824G , 825G and 826G Landfill Compactor Differential and Final Drive Oil Sample - Obtain
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.