Lombardini 11 LD Series - Dimensions and Clearance between Guides and Valves (MM); Valve Guide Insertion; Valve Guides and Cylinder Head Housìngs

26
COMPILER TECO/ATL
REG. CODE
1-5302-296
MODEL N°
50510
DATE OF ISSUE
01.89
REVISION 02
ENDORSED
DATE
17.04.2003
29
30
31
VIII
Valve guides and cylinder head housìngs
Intake and exhaust valve guides are both made of phosphoric cast
iron.
Components:
1 = Exhaust valve guide
2 = Intake valve guide
Dimensions (mm)
A = 42.00
B = 48.5
C = 14.000÷14.018
D = 14.050÷14.060
Valve guides with outside diameter increased by 0.5 mm are also
available; in such cases valve guide bore C should also be
increased by 0.5 mm.
Valve guide insertion
Heat cylinder head up to 160÷180°C
Press guides considering the A e B distances from the head plane.
Dimensions (mm):
A = 30.80÷31.20
B = 24.80÷25.20
Note: If guides are seated with stop ring C, first locate the ring in
place and then position guides without considering A and B.
Dimensions and clearance between guides and valves (mm)
A = 8.030÷8.045 (with guide in place)
B = 7.985÷8.000
(A-B) = 0.030÷0.060
(A-B) limit value = 0.15
DISASSEMBLY/REASSEMBLY