Table of Contents
Advertisement
ENGINE: HEAD. VALVES· GUIDES· SPRINGS AND ROCKERS
57
.
·
·
·
I
·
·
.
.
·
·
·
.
.
·
·
.
·
. . .
.
.
.
·
,
·
.
,
,
,
,
' ,
.
.
.
,
,
,
. .
,
H'~'
>f
l--
-h:j
,
.-:13
I -
, , ,
,
, ,
, '
, '
.,==
'
.
,
D~'
'5" S'./'
I--
~
,
.
:--
r;;
'-
~ .~
'--.
IS"
10" S'
).
INTAKE
EXHAUST
Fig. 91 - Inclination angles of valve. and seals in head.
Grind
valve seats recalling that
in brief intervals
during which
the
grindwheel contacts the seat the
current should be switched off from grinding
machine; this precaution will avoid vibrations which
may compromise the issue of grinding work.
It is
good practice frequently dressing the grind-
wheel on dressing machine Ap. 5050 (fig. 92), so
Flg.!2. Dre••lng tape, grindwheel A. 9408C on dressing machine
Ap. 5050.
1.
Spindle A. 94069. _ 2. Grindwheel A. 94084. - 3. Arm control
lever. -
<t.
Cutter travel control knob. - 5. Cutter locking screw. -
6. Diamond cutter. - 7. Working angle graduation scale. - 8. Work-
ing angle adjusting knob.
Fig. 93 _ Using 200 cutter to narrow valve seats.
1. Spindle A. 94058.• 2. 200 cutter. - 3. Cylinder head holding tool
A. 60041.
that the wheel taper of 45
0
±5' is maintained, cor-
responding to the valve seat angle.
Next, narrow the valve seats as follows:
- Place cutter A. 94083 (200) on spindle A. 94058
and slide spindle onto pilot A. 94015.
- Operate the cutter (fig. 93).
- Repeat the procedure above outlined with
cutler A. 94030 (75°) (fig. 94).
Use two cutters alternately until valve seats are
fashioned as shown in fig. 98.
Valve seats in head should be angled at 45°±5'.
Fig. 94 • Using 750 cuHer to narrow valve seats.
1. Spindle A. 94058. - 2. 750 cutter. - 3. Cylinder head holding'PlooJ
A. 60041.
.
Advertisement
Table of Contents
