Generac Power Systems 53187 - Manual (Page 84)

PART 2
ENGINE MECHANICAL
Cylinder Head Assembly (Continued)
4. Install CAPS on end of valve stem s. Install the PUi
RODS and the ROCKER ARM ASSEMBLY.
SH
ROCKER ARM TIGHTENING TORQUE
15-18 Ft.-Lbs. (2.0-2.5 m -kg)
Figure 17. Caps, Push Rods, Rocker Arm
Valve Clearance Adjustment
See Figure 18. Loosen the NUT, then adjust intake
and exhaust valve clearance to 0.008 inch (0.2m m ) by
turning the ADJUST SCREW . Use the follow ing proce­
dure:
1. Adjust valve clearance w ith engine cold.
2. Set No. 1 pistonattopdeadcenter(TDC). then adjust
the intake and exhaust valves of No. 1 cylinder and the
exhaust valve of No. 2 cylinder.
3. Turn the crankshaft 240* counterclockw ise (as
view ed from the front).
4. Adjust No. 3 cylinder intake and exhaust valves and
the intake valve of No. 2 cylinder.
Nut
Adjust screw
Valve clearance
1
SECTION 2.5
ENGINE REASSEMBLY
CYLINDER HEAD COVER TORQUE
6-8 Pt.-Lbs. (0.8-1.2 m -kg.)
Water Pump Assembly
Install the w ater pum p assem bly, gasxet and hose.
Figure 19. W ater Pum p, Gasket & Hose
Nozzles and Nozzle Holders
Install caps and gaskets. Install nozzle holders and
tighten to specified torque. Install the return pipe and
the injection pipes, tighten to specified torque.
NOZZLE HOLDER TIGHTENING TORQUE
58-61 Ft.-Lbs. (8.0-8.5 m -kg)
INJECTION PIPE TIGHTENING TORQUE
18-22 Ft.-Lbs. (2.5-3.0 m -kg)
Complete the Assembly
Install any rem aining engine com ponents.
Figure 18. Adjusting Valve Clearance
Cylinder Head Cover
Install cover gasket and cover. Tighten the cover evenly
to recom m ended torque.
PAGE 2.5-5