Connecting Rod Alignement; Crankshaft, Connection Radius; Crankshaft, Journal/Crankpin Diameter Check, Timing Cover Bearing Internal Diameters And Crankshaft And Big End Bearing Support; Crankshaft, Lubrication Ducts, Bore Thread On Flywheel Side And P.t.o - Kohler RD 441 Service Manual

74
C C
A
75
R
R
1
76
77
Workshop Manual KD 441_cod. 1.5302.865_2

Connecting rod alignement

Use a dial gauge as shown in the figure.
Check that axes are aligned using the piston pin; axial mis alignment
A = 0.015; limit 0.03 mm.
If the difference is greater, the connecting rod is not aligned, and it
must be replaced with a new one.
Crankshaft, lubrication ducts, bore thread on flywheel side and
p.t.o.
Remove plugs C and check that the lubrication duct is perfectly clean.
Close with a new plug checking for proper sealing.
A = M14x1.5 (turn counterclockwise)
B = M8x1.25
B

Crankshaft, connection radius

Caution – Warning
When the crankpin and main journal are ground, values R and R
must be obtained again to prevent the drive shaft from breaking.
Radius R that joins the crankpin to the supports is 3.3÷3.7 mm.
Radius R that joins the main journal to the timing gear is 1.5 mm.
1
Crankshaft, journal/crankpin diameter check, timing cover bea-
ring internal diameters and crankshaft and big end bearing sup-
port
Use an outside micrometer for the journal and an inside dial gauge for
the timing cover, crankshaft and big end bearings.
nd
ed_ rev. 01.
Overhauls and checking
5
1
- 39 -