Generac Power Systems G0071450, Руководство пользователя

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Maintenance
32 Owner’s Manual for 50 Hz Air-Cooled Generator Sets
6. See Figure 4-5 . Verify spark plug gap using a wire
feeler gauge. Replace spark plug(s) if spark plug
gap is out of specification. See
Specifications .
Figure 4-5. Spark Plug Gap Measurement
7. Install spark plug(s), and tighten to 25 Nm (18.4 ft-
lbs).
8. Install front access panel.
9. Perform “To turn the generator set back ON” in
Generator Set Enable/Disable Procedure .
Checking and Adjusting Valve
Clearance
Check valve clearance according to the Service Sched-
ule . Adjust if necessary.
Checking Valve Clearance
NOTE: The engine must be cool before checking valve
clearance. Adjustment is not needed if valve clearance is
within the dimensions provided in
Specifications .
1. Perform “To turn the generator set OFF” in Gener-
ator Set Enable/Disable Procedure .
2. Remove front access panel and intake side panel
as described in
Remove Front Access Panel and
Remove Intake Side Panel .
3. Turn off generator set fuel supply and disconnect
negative battery cable to avoid accidental start-up.
4. Remove spark plug wires, and position wires away
from spark plugs.
5. Remove spark plugs using a 13/16 in socket
wrench (8 kVA units) or a 5/8 in socket wrench
(10–13 kVA).
6. Remove the four screws attaching one valve cover
using a 10 mm socket wrench. Remove and dis-
card gasket.
7. Verify piston is at top dead center (TDC) of its com-
pression stroke (both valves closed). To move pis-
ton to TDC, remove intake baffle at the front of the
engine to access flywheel nut. Use a 30 mm socket
(8 kVA) or 36 mm socket (10–13 kVA) to rotate fly-
wheel nut clockwise, which will rotate the crank-
shaft. Watch piston through spark plug hole. The
piston should move up and down. Piston is at TDC
when it is at its highest point of travel.
8. See Figure 4-6 . Verify valve clearance between
rocker arm (E) and valve stem (F) with a feeler
gauge.
Figure 4-6. Check and Adjust Valve Clearance
9. Repeat steps 6–8 for second cylinder.
10. Install replacement valve cover gaskets.
11. Install valve covers.
NOTE: Start all four screws before tightening, or it will
not be possible to get all screws in place. Verify valve
cover gasket is in place.
12. Tighten fasteners in a cross pattern, tightening to
6.8 Nm (60
in-lbs ).
13. Install spark plugs and tighten to 25 Nm (18 ft-lbs).
14. Attach spark plug wires to spark plugs.
15. Reconnect negative battery cable and turn on gen-
erator set fuel supply.
16. Install intake side panel and front access panel.
17. Perform “To turn the generator set back ON” in
Generator Set Enable/Disable Procedure .
000211
ISO000534
Contact an IASD for service assistance.
Proper valve clearance is essential for
prolonging engine life.
002380
C
D
E
F