Table of Contents
Advertisement
156
FIAT· 850 PASSENGER CARS
1~
1.
J
6
8
" /
11
Il
17
19-..
11 -
19
J6
5
9
10
14
15
16
- _ 1 8
10
~11
14
16
~18
\",JO
J1
34
Fig. 269 • Detail of left side front suspension and wheel.
,. Shock absorber. - 2. Brake drum. - 3. Wheel hub mounting nut.•
4. Semi-elliptic spring. - 5. Rubber buffer. - 6. Control arm.
passing from reservoir to cylinder will be volu-
metrically equal to the portion of piston rod that
has slid out.
Therefore in this stroke only the rebound and
compensating valves are active while the com-
pression and inlet valves keep closed.
COMPRESSION STROKE
fig. 268 • Sectional view of shock absorber,
1. Resilient bushing, upper mounting.• 2. Rod .• 3. Cylinder upper
blanking threaded ring .• 4. Seal housing. - 5. Rod seal. - 6. Tab
spring. _ 7. Spring cup. - 8. Gasket packing spring. - 9. Casing
gasket. - 10. Vapour pocket drain chamber. - 11. Rod guide
bush-
ing. -
12.
Vapour pocket drain capillary hole.• 13. Dust shield. -
14. Casing .• 15. Working cylinder. - 16. Vapour pocket drain pas-
sage. -
17.
Buffer. - 18. Inlel valve
lilt
limiting disc. - 19. Valve lift
adjustment washer. - 20. Valve star shaped spring. - 21. Inlet valve. -
22. Piston snap ring. - 23. Piston •• 24. Inlet valve holes In piston. -
25. Rebound valve hotes in piston .• 26. Rebound valve.• 27. Valve
guide cup.• 28. Rebound valve spring. - 29. Piston mounting plug.•
30. Compensating valve.· 31. Compensating valve annular passage. -
32. Compression valve orifices .• 33. Gradual acting compression
valve. - 34. Compensating - and· compression valve carrier plug. -
35. lower plug. - 36. Threaded shank, lower mounting.
Starting from the car with parts serial number 207742 the upper
mounting has been obtained through taper resilient bushings.
In this phase shock absorber retracts and the
piston travels downwards.
The fluid in the lower chamber lifts inlet valve (21)
and part of it passes into cylinder upper portion.
Some of the fluid, instead, rams compression
valve (33), and through its orifices (32) passes into
the reserve.
The dampening effect
in this
phase
is
the result
of the displacement of an amount of fluid volu-
metrically equal to the portion of rod entering
the cylinder.
During this stroke both the compensating (30)
and rebound (26) valves remain closed and only
the compression (33) and inlet (21) valves are
operative.
Advertisement
Table of Contents
