856534 Volvo.Penta Base engine

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     1P-1855     Retaining Ring Pliers     1    Start By:
Remove the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Remove".Note: The engine oil pump is mounted on the No. 1 crankshaft main bearing cap. The engine oil pump can be removed without removing the front housing if the No. 1 crankshaft main bearing cap is removed. Use a 9U-6282 Torque Wrench Extension in order to remove the No. 1 crankshaft main bearing cap. The engine oil pump is then removed from the No. 1 crankshaft main bearing cap.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Illustration 1 g00552238
Remove two bolts (1) from suction pipe (3) .
Remove bolt (2) from the mounting bracket.
Remove the strainer, suction pipe (3), and the gasket.
Remove the engine oil relief valve. Refer to Disassembly and Assembly, "Engine Oil Relief Valve - Remove".
Illustration 2 g00545971
Use Tool (A) to remove retaining ring (4) .
Remove idler gear (5) from the gear drive of the engine oil pump. Inspect the shaft of the idler gear for wear or damage. Use the following steps if the shaft needs to be replaced.
Use a suitable press in order to remove the shaft for the idler gear from a 3054 Engine.
Illustration 3 g00572891
Idler gear shaft (A) 8.3 mm (0.33 inch) (B) 20.0 mm (0.79 inch) (C) 1.0 mm (0.04 inch) (D) 16.25 0.15 mm (0.640 0.006 inch) (E) The bore has a diameter of 6.9 mm (0.27 inch). The bore has a depth of 22.0 mm (0.87 inch). The hole is for a 5/16-24 UNF and an 18 millimeter thread. (F) 36.0 mm (1.42 inch) (G) The bore has a diameter of 6.55 0.05 mm (0.258 0.002 inch). The bore must be countersunk 9.0 millimeters. (H) 31.75 mm (1.250 inch) (I) 15.9 mm (0.63 inch)
The shaft for the idler gear on a 3056 Engine is retained with a pin. Make a drill guide with the dimensions listed above in order to remove the pin.
Illustration 4 g00572847
Place drill guide (1) into position on the opposite side of pin (2) on the main bearing cap.Note: Ensure that the countersink in the guide faces outward. Also ensure that the edge of the guide is aligned with the front edge of the main bearing cap. Use a 5/16 inch UNF (4) and a flat washer (3) to retain the guide.
Drill a hole with a 6.4 mm (0.25 inch) diameter in the main bearing cap. The hole should be 47.0 mm (1.85 inch) deep.
Remove drill guide (1) .
Use a suitable drift to drive pin (2) from the main bearing cap.
Press the shaft for the idler gear out of the main bearing cap.
Illustration 5 g00545972
Remove three bolts (6) that hold engine oil pump (7) on the front of the engine.
Remove engine oil pump (7) .