Matchless G3L Maintenance Manual page 54

Introduced in early 1941 for use under strenuous war conditions by all the allied armies,
It remains unaltered, except in detail, to this day, and copied practically universally. The
hydraulic dampers operate in tubular members located inside the main tubes.
be seen the aluminium sliding members operate upon steel bushes attached to the b o t t o m
ends of the main tubes and also upon bakelite bushes, secured to t h e t o p end of the
sliders themselves.
prevent leakage of oil f r o m below int o the main spring chamber.
oil is w e l l above the b o t t o m e x t r e m i t y of the main inner tubes and bearing this in m i n d ,
it is at once clear that upward movement of t h e sliders resulting f r o m impact w i t h road
bumps in addition to meeting resistance f r o m the main springs also causes oil to be ejected
by the close fittin g steel bushes.
main inner tubes and also t h r o u g h the holes A (illustration 16) in t h e b o t t o m of t h e
damper tubes, then past the damper disc valve which the passing oil raises off its seat.
As the oil level rises inside the main inner tubes, air trapped is compressed, thereby
formin g an air buffer acting as auxiliary to the main springs.
oil upon impact imposes a certain amount of damper effect, the extent of which
increases w i t h the violence of the shock, or in o t h e r words, the bigger the bump
the greater the damping effect.
returns to its seat and the oil trapped between this valve and the plunger sleeve above
Illustration 16
Above these bushes, an oil seal is f i t t e d , the object of which is to
This oil is forced upward through the open ends of the
Upon the recoil movement, the damper disc valve
52
As w i l l
The normal level of
This displacement of