Bryant Automatic Standby Generator ASPAS1BBA007 - Manual (Page 11)

• 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:
Hold the rocker arm jam nut in place as the pivot ball
stud is turned.
When valve clearance is correct, hold the pivot ball stud
in place with 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.
Figure 1.9 - Valve Clearance Adjustment
• Install new valve cover gasket.
• Re-attach the valve cover.
NOTE:
Start all four screws before tightening or it will not be
possible 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.
• On GT-990, Repeat the process for the other cylinder.
NOTES:
Jam Nut
Pivot Ball
Stud
Rocker
Arm
Valve
Stem
Bryant 9
Section 1 — Post Installation Start-up and Adjustments
Bryant Air-cooled 7 kW, 12 kW and 15 kW Generators