Retorquing Head Bolts; Maintenance Schedule - Generac Power Systems GN - 320 Owner's Manual

RETORQUING THE HEAD BOLTS
After the first 50 hours of operation, retorque the head bolts.
NOTE: Only perform this adjustment after the first 50 hours of
operation. The head bolts will need no further adjustment.
1. Remove the four (4) screws from the rocker cover
(see Figure 10).
2. Remove the rocker cover and rocker cover gasket.
3. Torque the bolts to 6.9 kg-m. (44 ft-lb).
4. Torque the bolts in the following sequence: A, B, C, D, (star
pattern). See Figure 12.
MAINTENANCE OPERATION
Check Oil Level
Change Oil
Change Oil Filter (if so equipped)
Service Air Filter
Replace or Clean Spark Plug
Clean Spark Arrestor Screen
Adjust Valve Clearance
Retorque Head Bolts
NOTE 1: Change oil and filter after first 8 hours of operation and then every 50 hours thereafter. Change sooner when operating under heavy load or
in dusty or dirty environment or in high ambient temperature.
NOTE 2: Clean more often when operating under dirty or dusty conditions.
NOTE 3: Perform this task ONLY after first 50 hours of operation. Head bolts will NOT need further retorquing.
G G e e n n e e r r a a c c G G N N - - 3 3 2 2 0 0 / / 3 3 6 6 0 0 / / 4 4 1 1 0 0 E E n n g g i i n n e e

MAINTENANCE SCHEDULE

Every 8 Hours or
or Daily
X
Figure 12 — Tightening Sequence
25 Hours or Every 50 Hours or Every
Season
See Note 1
See Note 1
Foam Pre-Filter Paper Filter (Note 2)
See Note 3
— 12 —
100 Hours or Every
Season Season
X
X
X