Lombardini CHD series - Valve Guide and Seat Procedures; Valve guide insertion, after driving; Oil seal in the valves guides, (intake and exhaust); Valve seats and bore

- 33 - Workshop Manual LDW CHD _ cod. 1.5302.345 - 6° ed_rev. 05
A
mm025,14÷005,14
B
mm095,14÷575,14
C
mm025,63÷005,63
D
095,63÷575,63
aa
a
aa °54÷'35°44
aa
a
aa
1
°06÷'35°95
*sS
55,1÷72,1
00,2
*aS
06,1÷02,1
H
00,1÷57,0
03,1
X
530,7÷020,7
Y 530,7÷020,7
L 2,73÷8,63
A
00,7÷589,6
A-Y
050,0÷020,0 001,0
A-X
4
29
28
26
25
30
27
Valve guide insertion, after driving
Press guides considering the L distance from the head plane X.
Clearance
(mm)
Limit value
(mm)
Dimensions
(mm)
Ref.
Dimensions
Ref.
Limit value
(mm)
Dimensions
(mm)
Ref.
Ref.
Disassembly / Reassembly
Valve recess and sealing surfaces
Ss* = Sealing surface width on exhaust side
Sa* = Sealing surface width on intake side
H = Valve recess with reference to the head plane
Valve seats and bore
Oil seal in the valves guides, (intake and exhaust)
To prevent the seal 1 warping when mountig the valve guide
3 put it into the tool 2 part no. 7107-1460-047 and proceed as
showninthegure27,makingsuretheseal1 reaches its stop.