Test 35 Check Valve Adjustment | Generac Power Systems 55, 75, 65

Section 7

DIAGNOSTIC TESTS

measured. During cranking and running this read- ing should go to “Infinity”. Verify that the meter leads were properly connected as per Step 2 instructions.

2.If battery voltage was not measured in Step 3, reconnect Wire 15 and Wire 14 to their correct terminal locations.

way is provided for alignment only and theoretically carries no load.

If the flywheel key becomes sheared or even partially sheared, ignition timing can change. Incorrect timing can result in hard starting or failure to start.

Remove and inspect flywheel key for damage.

Figure 7-40. – Engine Ground Harness Test Points

3.If “Infinity” was not measured in Step 15, repair or replace grounded Wire 18A between the J1 Connector and the insulat- ed terminal stud or defective insulated terminal stud.

4.If sparking still does not occur after adjusting the armature air gap, testing the ground wires and performing the basic flywheel test, replace the ignition magneto(s).

Note: Before replacing the Ignition Magneto, check the Flywheel Magnet.

CHECKING FLYWHEEL MAGNET:

The flywheel magnet rarely loses its magnetism. If you suspect a magnet might be defective, a rough test can be performed as follows:

1.Place the flywheel on a wooden surface.

2.Hold a screwdriver at the extreme end of its handle and with its point down.

3.Move the tip of the screwdriver to about 3/4 inch (19mm) from the magnet. The screwdriver blade should be pulled in against the magnet.

FLYWHEEL KEY:

In all cases, the flywheel taper is locked on the crank- shaft taper by the torque of the flywheel nut. A key-

TEST 35 - CHECK VALVE ADJUSTMENT

DISCUSSION:

The valve lash must be adjusted correctly in order to pro- vide the proper air/fuel mixture to the combustion chamber.

ADJUSTING VALVE CLEARANCE:

Adjust valve clearance with the engine at room tem- perature. The piston should be at top dead center (TDC) of its compression stroke (both valves closed).

An alternative method is to turn the engine over and position the intake valve fully open (intake valve spring compressed) and adjust the exhaust valve clearance. Turn the engine over and position the exhaust valve fully open (exhaust valve spring com- pressed) and adjust the intake valve clearance.

Correct valve clearance is given below, in INCHES (MILLIMETERS).

Intake Valve	0.002-0.004 (0.05-0.1)
Exhaust Valve	0.002-0.004 (0.05-0.1)

1.Loosen the rocker arm jam nut. Use a 10mm allen wrench to turn the pivot ball stud while checking the clearance between the rocker arm and valve stem with a feeler gauge (see Figure 7-41).

Figure 7-41 – Adjusting Valve Clearance

2.When clearance is correct, hold the pivot ball stud with the allen wrench and tighten the rocker arm jam nut to the speci- fied torque with a crow's foot. After tightening the jam nut, recheck valve clearance to make sure it did not change.

TORQUE SPECIFICATION ROCKER ARM JAM NUT 174 inch-pounds

Page 61

65, 75, 55 specifications

Generac Power Systems has established itself as a leader in power generation, offering a range of high-performance generators suited for residential and commercial applications. Among its lineup, the Generac 55, 65, and 75 kW generators stand out for their reliability, efficiency, and advanced features.

The Generac 55 kW generator is designed to provide a powerful backup solution for medium to large homes or small businesses. It features a robust engine that delivers dependable performance while maintaining fuel efficiency. One of its key characteristics is the True Power Technology, which produces clean and stable power, ensuring that sensitive electronic devices run smoothly without risk of damage. This generator is equipped with a fully automatic transfer switch, allowing for seamless power transition during outages, with minimal disruption.

Moving to the 65 kW model, it offers increased capacity while retaining the fundamental qualities of the 55 kW version. This unit is particularly suited for larger homes or commercial applications that require greater power demands. The 65 kW generator utilizes Generac’s G-Force engine, known for its durability and reduced maintenance needs. Advanced features such as remote monitoring capabilities allow users to check the generator's status from anywhere, providing peace of mind and convenience.

The 75 kW generator takes performance to the next level, making it ideal for even more significant power needs. It is engineered for both quiet operation and enhanced performance, accommodating a wide range of requirements from residential to larger commercial operations. The 75 kW model includes a full-load voltage regulation system that maintains stable power output under varying loads, safeguarding appliances and equipment.

All three models incorporate advanced air-cooled technology, which enhances their efficiency and operational lifespan. Additionally, their corrosion-resistant enclosures ensure durability even in harsh weather conditions, making them suitable for diverse environments. The intuitive LCD display on each unit provides critical information, including runtime hours and maintenance reminders, empowering users with easy access to the generator's performance data.

Overall, Generac Power Systems' 55, 65, and 75 kW generators represent a commitment to quality, reliability, and innovation in backup power solutions. They are designed to meet the demands of modern power consumption while ensuring peace of mind through robust engineering and advanced technology. Whether for home use or commercial applications, these generators provide an effective means to stay prepared for unexpected power outages.

Generac Power Systems 55 Test 35 Check Valve Adjustment, Checking Flywheel Magnet, Flywheel KEY

Models: 65 75 55