Valves; Removing Carbon Deposits, Checking And Grinding Valves; Checking Clearance Between Valve Stem And Valve Guide And Valve Centering - Case 445/M2 Service Manual

32
E NG I NE S

VALVES

Figure 74
EXHAUST
VALVE
42.13
41.87
INTAKE AND EXHAUST VALVE MAIN DATA
Removing carbon deposits, checking and
grinding valves
Figure 75
Remove carbon deposits from valves using the proper metal
brush.
Check that the valves show no signs of seizing, scoring or
cracking.
Regrind the valve seats, if required using acceptable
tools and removing as little material as possible.
ED. FEBUARY 2003
INTAKE
VALVE
Check the valve stem (1) using a micrometer (2), it shall be
6.960 to 6.980.
45.13
44.87
70326
Checking clearance between valve stem and
valve guide and valve centering
18625
Use a magnetic base dial gauge (1) set as shown in the figure,
the assembling clearance shall be 0.052 ± 0.092 mm.
Turn the valve (2) and check that the centering error is not
exceeding 0.03 mm.
SECTION 4 − OVERHAUL AND TECHNICAL SPECIFICATIONS
Figure 76
Figure 77
1
2
18882
75757