Adjust Valve Clearance - Generac Power Systems 6055 Owner's Manual

Move piston to Top Dead Center (TDC) of compression stroke (both valves closed). Proceed as follows:
9.
a. Remove intake screen at front of engine to gain access to flywheel nut.
b. Place large socket and socket wrench on flywheel nut and rotate engine in a clockwise direction while watch-
ing piston through spark plug hole.
NOTE: Piston is at TDC when it is at the highest point of travel.
Left
Insert a 0.002 - 0.004 inch (0.05 - 0.1mm) feeler gauge between rocker arm and valve stem. Clearance is correct
10.
when a slight drag is felt while sliding feeler gauge back and forth. Verify that clearances are within the following
specification:
Intake and Exhaust: 0.002 - 0.004 inch (0.05 - 0.1mm)
Proceed as follows:
11.
a. If valve clearance adjustment is required, see Subsection 4.7.3.2— Adjust Valve Clearance.
b. If valve clearance is within specification, see steps 5-12 under Subsection 4.7.3.2— Adjust Valve Clearance.
4.7.3.2— Adjust Valve Clearance
Loosen rocker arm jam nut. Use an Allen wrench to turn the pivot ball stud, while also checking clearance
1.
between rocker arm and valve stem with the feeler gauge.
NOTE: Hold the rocker arm jam nut in place as the pivot ball stud is turned.
When the correct valve clearance is obtained, hold the pivot ball stud in place with the Allen wrench and tighten
2.
rocker arm jam nut until snug.
Using a torque wrench, tighten jam nut to 174 in-lbs (20 N-m).
3.
Recheck valve clearance to verify that it did not change during tightening of the jam nut.
4.
Install new valve cover gasket.
5.
Start four screws to install valve cover.
6.
Verify that valve cover gasket is properly positioned, and then alternately tighten screws to 6-9 ft-lbs (8-12 Nm)
7.
using a crosswise pattern
Finger tighten spark plugs into cylinder head, and then using a spark plug socket, tighten to 15-18 ft-lbs (20-25
8.
Nm).
Install spark plug cables onto spark plug terminals.
9.
Synergy Automatic Standby Generator Owner's Manual
4-Pin
Connector
Figure 4-6. Remove AVR Fan Connector and Screws
Maintenance
Right
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