963197 Volvo.Penta Hexagon screw

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Remove the engine enclosure (hood). Refer to Disassembly and Assembly, "Engine Enclosure (Hood) - Remove and Install".
Tilt the cab, if equipped. Refer to Disassembly and Assembly, KENR3574, "Cab - Tilt".
Tilt the operator platform, if equipped. Refer to Disassembly and Assembly, KENR3574, "Operator Platform - Tilt".
Personal injury can result from hot coolant, steam and alkali.At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.Remove filler cap slowly to relieve pressure only when engine is stopped and radiator cap is cool enough to touch with your bare hand.Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns.Cooling System Conditioner contains alkali. Avoid contact with skin and eyes.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
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.
Note: Put identification marks on all lines, on all hoses, on all wires and on all tubes for installation purposes. Plug all lines, all hoses and all tubes. This will help to prevent fluid loss and this will help to keep contaminants from entering the system.
Use the petcock and drain hose that is located on the radiator to drain coolant from the radiator and the engine. The capacity of the cooling system is 34 L (9.0 US gal).
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Remove hose assemblies (1) and (2) from the vibratory pump.
Remove hose assembly (4). Remove fitting (3) from the propel pump.
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Remove hose assembly (5) .
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Disconnect electrical connector (6) .
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Remove hose assemblies (7) and (8) from the propel pumps.
Remove the cotter pin and pin (11). Loosen nut (9) and remove cable assembly (10) from the propel pump.
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Remove hose assembly (12) from the propel pump.
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Remove the screws that fasten electrical connectors (13) and (14) to the control valve on the propel pumps. Remove electrical connectors (13) and (14) from the control valves.
Remove fittings (15) and (17) from the propel pumps.
Disconnect electrical connector (16). Remove the cable straps that fasten electrical harnesses (18) to the propel pumps.
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Remove hose assemblies (19) from the axle propel pump.
Remove hose assemblies (20) from the drum propel pump.
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Loosen the hose clamps and remove he