Section 2.4

CRANKSHAFT AND CAMSHAFT

GENERAL

Prior to removal of the crankcase cover, gain access to the engine and generator by removing surrounding sheet metal as required. See Section 1.6.

CRANKCASE COVER REMOVAL

Before attempting to remove the crankcase cover, remove rust, paint and burrs from the power takeoff (PTO) end of the crankshaft. This will reduce the pos- sibility of damaging the oil seal in the crankcase cover or the bearing during cover removal.

To remove the crankcase cover, proceed as follows:

1.Drain oil from the crankcase.

2.Remove the engine cylinder head, push rods and push rod guide plate. See Section 2.2.

3.Remove all bolts that retain the crankcase cover to the crankcase.

4.Remove the crankcase cover. If necessary, tap lightly with a soft hammer on alternate sides of the cover.

Figure 1. Crankcase Cover Removal

CAMSHAFT REMOVAL

See Figure 2. Remove the camshaft as follows:

1.Tip the engine over onto the flywheel end of the crankshaft. Support the engine to prevent end of crankshaft from resting on the workbench.

2.Reach in with two fingers and hold the tappets up so they are clear of the camshaft lobes. Then, remove the camshaft.

3.Remove the two tappets.

4.Remove the outer and inner oil pump rotors.

CRANKSHAFT REMOVAL

See Figure 3. To remove the crankshaft, proceed as follows:

1.The engine flywheel must be removed before the crankshaft can be removed.

2.The piston and connecting rod must be removed.

3.Remove the crankshaft by pulling it straight out of the crankcase.

Figure 2. Camshaft Removal

Figure 3. Crankshaft Removal

(Continued)

Page 2.3-5

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Generac Power Systems 941-2, 940-2 service manual Crankcase Cover Removal, Camshaft Removal, Crankshaft Removal
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941-2, 940-2 specifications

Generac Power Systems has established a strong reputation in the field of backup power solutions, particularly with its innovative products like the Generac 940-2 and 941-2 generator systems. These generators are designed to provide reliable power during emergencies, ensuring that homes and businesses can maintain operations seamlessly when grid power is disrupted.

One of the standout features of the Generac 940-2 and 941-2 models is their robust engine performance. Both generators utilize Generac’s patented engines, known for their durability and efficiency. These engines are built to withstand the most demanding conditions while providing a consistent power output. This reliability is crucial for users who depend on uninterrupted power supply for essential appliances and equipment.

In terms of technologies, the Generac 940-2 and 941-2 are equipped with advanced automatic transfer switch capabilities. This technology allows the generators to automatically start and supply power within seconds of an outage. This quick response time helps to ensure that critical systems remain operational without noticeable interruptions, which is vital for businesses and households alike.

Another important characteristic of these models is their user-friendly interface. The generators come with an intuitive digital controller that provides real-time information on power usage, system status, and maintenance needs. This technology makes it easy for users to monitor their generators and ensure they are always ready for an emergency.

The design of the Generac 940-2 and 941-2 also emphasizes noise reduction and aesthetic appeal. These units are engineered for quieter operation compared to traditional generators, making them suitable for residential areas. Their sleek appearance also fits well with modern home exteriors, enhancing rather than detracting from the property’s visual appeal.

Furthermore, these generators offer flexible fuel options, with the ability to run on natural gas or propane. This versatility allows users to choose the fuel source that best meets their needs, contributing to energy efficiency and lowering overall operating costs.

In summary, the Generac Power Systems 940-2 and 941-2 are exceptional generators that combine powerful performance with innovative technologies. Their automatic transfer switch capabilities, user-friendly controls, noise reduction features, and flexible fuel options make them an excellent choice for anyone seeking reliable backup power solutions. With these generators, users can rest assured knowing they have a dependable energy source ready when they need it most.
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