Torque Flywheel Nut; Adjust Air Gap; Install Cylinder Head; Install Rocker Arms - Generac Power Systems GTH760 Service Manual

SeCTIoN 13: eNGINe ASSeMblY
Figure 13-12. Torque Flywheel Nut
AdjuST IGNITIoN CoIl AIr GAP
1. Rotate flywheel until magnet is under coil laminations.
2. Place 0.20-.30mm (.008"-.012") thickness, non-magnetic
gauge between magnet and coil laminations, Figure 13-13.
Figure 13-13. Adjust Air Gap
3. Loosen mounting screw so magnet will pull coil down
against thickness gauge.
a. Torque screws to 4.75 Nm (40 in. lbs.).
4. Rotate flywheel to remove thickness gauge.
5. Repeat for second coil.
INSTAll CYlINder HeAdS
1. Install cylinder head with new gasket.
2. Lubricate threads of head bolts with one drop of oil.
a. Torque head bolts in sequence shown (Figure 13-14) to
29.9 Nm (22 ft. lbs.).
3. Insert push rods into recess in tappets.
A
C
TORQUE SEQUENCE FOR HEADS:
Figure 13-14. Install Cylinder Head

INSTAll roCker ArMS

1. Lubricate rocker arms and ball studs with clean engine oil.
2. Assemble ball studs, rocker arms, jam nuts and guide plates
(with tabs facing up) to cylinder head, Figure 13-15.
a. Make sure that the push rods are in the proper location
on the tappets and the rocker arms.
STUD
NUT
Figure 13-15. Install Rocker Arms
13-4
D
B
A-B-C-D-E-F
ROCKER ARM
GUIDE PLATE
(WITH TABS FACING UP)