Install Cylinder Heads; Adjust Valve Clearance; Torque Sequence; Install Guide Plate, Rocker Arm Pivot, Push Rods And Rocker Arms - Kohler Command Pro ECV850 Service Manual

Reassembly

Install Cylinder Heads

Torque Sequence

1
3
6
5
4
2
NOTE: Match numbers embossed on cylinder heads
and crankcase.
1. Check to make sure there are no nicks or burrs on
sealing surfaces of cylinder head or crankcase.
2. Check dowel pins are in place in 2 locations, and
install a new cylinder head gasket.
3. Install cylinder head. Make sure head is fl at on
gasket and dowel pins. Start 6 screws.
4. Torque screws in 2 stages, fi rst to 23.7 N·m
(210 in. lb.), fi nally to 46.9 N·m (415 in. lb.) following
sequence shown.
5. Repeat procedure for opposite cylinder.
Install Guide Plate, Rocker Arm Pivot, Push Rods
and Rocker Arms
NOTE: Install rocker arm stud with coarse threads into
head.
1. Install push rod guide plate and rocker arm studs
onto cylinder heads if removed previously. Torque
studs to 24.0 N·m (212 in. lb.).
2. Note mark or tag identifying push rod as either
intake or exhaust and cylinder 1 or 2. Dip ends of
push rods in engine oil and install, making sure each
push rod ball seats in its socket.
3. Apply grease to contact surfaces of rocker arms and
rocker arm pivots. Install rocker arms, rocker arm
pivots, and set screws.
92
1
3
6 5
2
4
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Adjust Valve Clearance

NOTE: It takes two hands to make lash adjustment. A
clamping device or an assistant to hold lifter
compressed while making adjustment will make
process easier.
1. Turn set screw in rocker arm pivots by hand
clockwise (down), only enough to capture push rods
in recesses.
2. Rotate crankshaft to establish TDC on compression
stroke for cylinder 1.
Check for:
a. Compression will be felt through spark plug hole.
b. Keyway of crankshaft will be aligned with
cylinder 1.
c. No rocker arm/push rod movement if crankshaft
is rotated slightly back and forth. If they are
moving, rotate crankshaft one full revolution.
3. Insert a 0.127 mm (0.005 in.) feeler gauge between
end of one valve and rocker arm.
4. Turn set screw until a slight drag is felt.
5. Hold in this position and tighten set screw securely.
Torque set screw to 7.8 N·m (69 in. lb.), then
recheck adjustment.
6. Proper clearance for all valves is 0.050/0.127 mm
(0.0020/0.0050 in.).
7. Repeat procedure for other cylinder.
Check Assembly
Rotate crankshaft a minimum of two revolutions to
check assembly and overall proper operation.
19 690 01 Rev. --