Section 3 — Maintenance

Commercial-Industrial-Residential Portable Generator System

Figure 21 - Spark Arrestor

the allen wrench and tighten the rocker arm jam nut. Tighten the jam nut

 

to 174 in/lbs. torque. After tightening the jam nut, recheck valve

 

clearance to make sure it did not change.

MUFFLER OUTLET

TUBE

RETAINER

SPARK ARRRESTOR

SCREEN

RETAINING

SCREW

3.6 ADJUSTING VALVE CLEARANCE

After the first 50 hours of operation, you should adjust the valve clearance in the engine.

Important: If you feel uncomfortable about doing this procedure or you don't have the proper tools, please take your generator in to the nearest service center to have the valve clearance adjusted. This is a very important step to insure longest life for your engine.

To adjust valve clearance:

Make sure the engine is at room temperature.

Make sure that the spark plug wire is removed from the spark plug and out of the way.

Remove the four screws attaching the valve cover with a #2 or #3 phillips screwdriver.

Make sure the piston is at Top Dead Center (TDC) of its compression stroke (both valves closed). To get the piston at TDC, remove the intake screen at the front of the engine to gain access to the flywheel nut. Use a large socket and socket wrench to rotate the nut and hence the engine. While watching the piston through the spark plug hole. The piston should move up and down. The piston is at TDC when it is up as high as it can go.

Loosen the rocker jam nut. Use an 10mm allen wrench to turn the pivot ball stud while checking clearance between the rocker arm and the valve stem with a feeler gauge. Correct clearance is 0.002-0.004 inch (0.05-0.1 mm).

NOTE: You must hold the rocker arm jam nut in place as you turn the pivot ball stud.

When valve clearance is correct, hold the pivot ball stud in place with

Figure 22 - Valve Clearance Adjustment

Rocker

Pivot BallArm

Stud

Jam Nut

Valve

Stem

Install new valve cover gasket.

Re-attach the valve cover.

NOTE: Start all four screws before tightening or you will not be able to get all the screws in place. Make sure the valve cover gasket is in place.

Re-attach the spark plug wire to the spark plug.

Repeat the process for the other cylinder.

17

Page 19
Image 19
Generac 004451, 004582, 004451 ,004582 owner manual Adjusting Valve Clearance, To adjust valve clearance

004451, 004582, 004451 ,004582 specifications

Generac is a leading manufacturer of power generation equipment, known for its robust and reliable systems. Among its vast lineup, the Generac 004451 and 004582 portable generators stand out due to their impressive features, advanced technologies, and user-friendly characteristics, making them suitable for various applications such as home backup, outdoor activities, and job sites.

The Generac 004451 model boasts a powerful 2,500-watt output, making it ideal for powering essential appliances during outages or for use in recreational settings. Its compact design enhances portability, allowing users to easily transport it wherever needed. This generator features a durable frame designed to withstand rugged environments, including a fold-down handle for convenient storage. It is equipped with a reliable 50-state compliant engine, ensuring that it meets stringent environmental regulations while delivering dependable power.

On the other hand, the Generac 004582 model is designed for users needing a bit more power, featuring a 3,200-watt maximum output. Like the 004451, it emphasizes portability and ease of use, but it also incorporates a more advanced inverter technology. This innovation ensures that the generator produces clean, stable power, making it safe for sensitive electronics like smartphones, laptops, and medical devices. The 004582's lightweight construction allows for effortless transport, while its fold-down handle and never-flat wheels enhance mobility.

Both models are engineered with user-friendly controls and features such as easy-to-read fuel gauges and a low-oil shutdown system, which prevents engine damage by automatically shutting down the generator when the oil level is too low. Additionally, these generators include multiple AC outlets, offering versatility in powering various devices simultaneously.

Safety is paramount in Generac's design philosophy, as evident in the inclusion of features such as circuit breakers to prevent overloads. Additionally, they are equipped with a robust cooling system that allows for prolonged operation without overheating.

Overall, the Generac 004451 and 004582 portable generators provide a perfect blend of power, portability, and technological advancements, making them suitable for emergency backup power, outdoor events, and job site requirements. With a strong emphasis on reliability and user convenience, Generac continues to be a trusted name in the field of power generation.