Lombardini 11 LD 626-3 - Dimensions and Clearance between Guides and Valves; Valve Guide Insertion; Valve Seat Lapping; Valve Seats and Housings

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11 LD Workshop Manual_cod. 1.5302.296_5° ed_ rev. 04
A
02,13÷08,03
B
02,52÷08,42
A
610,04÷000,04
B
041,04÷021,04
C
610,43÷000,43
D
041,43÷021,43
D
52,1÷57,056,1
A
040,8÷520,8
550,0÷520,051,1
B
000,8÷589,7
4
44
45
46
47
Valve guide insertion
Heat cylinder head up to 160 ÷ 180°C.
Thread guides considering the A e B distances from the head plane.
Note: If the guides are supplied with the housing for the lock ring C,
insert the ring, then drive the guides until the lock ring is
stopped without worrying about A and B.
Dimensions (mm)Ref.
Clearance
(mm)
Limit value
(mm)
Dimensions
(mm)
Ref.
Dimensions (mm)
Ref.
Limit value (mm)
Dimensions (mm)
Ref.
INTAKE
VALVE
EXHAUST
VALVE
Disassembly / Reassembly
Valve seat lapping
After cutting, lap valve seats with fine emery paste in oil suspension.
The sealing surface S should not exceed 2 mm.
Valve recess after grinding
Valve seats and housings
Dimensions and clearance between guides and valves