Sunbeam ALPINE I SERIES: APLINE II SERIES, Руководство по ремонту, Страница: 154 / 413

WSM.12<4
Section E (Gearbox & Overdrive)
TESTING OIL PRESSURE
Release the hydraulic pressure as previously
described.
Remove the operating valve plug and fit in its place
the special adaptor (VLC. L.188). Use an oil
pressure gauge reading to 800 lbs. per sq. in.
(56·24 kgs. per sq. cm.) using a pipe union to fit
the
·r
B.S.P. Internal thread in the adaptor.
Jack up the rear wheels of the car, start the engine
and engage top gear and overdrive with the engine
ticking over slowly.
A pressure of 480-500 lbs. per sq. In. (approx.)
(33·75-35·15 kgs. per sq. cm.) should be recorded.
THE OPERATING VALVE (See Fig. 8)
To gain access to the operating valve, remove the
cover plate from the floor centre, on the driver's
side. With the ignition on, top gear engaged and
Fl1. 15. Oil pump and valve
4th re-issue
Page 19
engine stopped, move the overdrive switch into
and out of the overdrive position ten or twelve
times to release hydraulic pressure.
Remove valve plug, take out plunger and spring
and remove ball with a magnet.
The valve can be removed with a tapered piece of
wood, but care must be exercised to avoid damage
to the seating at the top of the valve.
Near the bottom of the valve will be seen a small
hole breaking through to the centre drilling.
This js the jet for restricting the exhaust of oil
from the operating cylinders. Ensure that this jet
is not choked.
If the unit fails to operate and the ball valve Is
found to be seating and lifting correctly check that
the pump Is functioning.
Jack up the rear wheels of the car, then with the
engine ticking over and the valve plug removed,
engage top gear. Watch for oil being pumped Into
the valve chamber. If none appears check the relief
valve and pump valve.
THE RELIEF VALVE
Access to the relief valve is gained through a
plug in the bottom of the main casing (33 Fig. 19).
To dismantle
Release the hydraulic pressure as previously
described. Remove the drain plug and drain off
oil.
Remove the valve plug, this will release the valve
spring and plunger (and ball on early units).
Remove the valve body.
Inspect the "0" ring, spring and plunger etc.
for damage. The plunger (ball on early units)
should be a sliding flt in the valve body.
THE PUMP VALVE (See Fig. 15)
Access to the pump valve is gained through the
centre plug In the bottom of the main casing.
To dismantle
Proceed as follows:-
1. Release the hydraulic pressure as previously
described. Remove the drain plug and drain off
oil.