19
Throttle Linkage
The correct setting of the throttle linkage cannot be over-empha-sized. The throttle and automatic
gearbox controls being inter-connected, various conditions affecting car performance can be
encountered if the throttle is not set correctly. As well as poor general performance, there may be
delays in automatic gear-changes, both up and down, and total failure of the “kick-down’. If the
linkage has been disturbed for any reason, it must be reset in the following manner, with reference to
fig. 7.
(1) Block choke valve in fully open position and ensure release of fast idle cam. (These
precautions are not necessary on a fully warmed-up engine).
(2) Disconnect :
(a)
Carb rod (A) at crosshaft lever
(B)
(b)
Carb-bellcrank rod (C) at carburettor
(c)
Rod (D) at upper end
(d)
Cable (G) from lever
(H)
(3) Insert 3/16 dia, rods in the two positions indicated.
(4) Using rod (D) to hold throttle valve lever (J) against forward stop, adjust rod end until it clips
onto ball end stud (E).
(5) Remove 3/16 dia. rod from bellcrank (F) and, still loading system against throttle valve lever
stop, adjust rod (C) till slotted hole just slips over carburettor lever stud. Then adjust rod
end out three (3) full turns and replace washer and spring pin in position.
(6)
Adjust carburettor rod (A) until ball joint stud locates in lever (B) on crosshaft and fix with
nut and spring washer.
Adjust cable end ball joint, while applying a light load against cable stop, until it locates in hole
in accelerator crosshaft lever
(H)
and fix with nut and spring washer.
(7) Remove
A
dia. rod from crosshaft, and blocks from carburettor choke valve, and test that full
throttle opening is being obtained in carburettor when the pedal is depressed fully against
floor stop. If necessary adjust floor stop.
Air Cleaner
The air cleaner is held on top of the carburettor by one wing nut. Every 8,000 miles the air cleaner
element should be cleaned. Every 32,000 miles, or more often under dusty conditions, a new
element should be fitted. At any time if there should be an oil mark on 2/3 of the circumference a
new element should be fitted.
Closed Crankcase Vent System
The crankcase ventilator valve is located on the right hand rocker cover and is connected to the
carburettor body by a rubber tube. The valve serves as a vent for the crankcase, and also provides
upper cylinder lubrication by introducing oily vapour into the inlet manifold.
Every 8,000 miles the valve should be checked for correct operation.
The left hand rocker cover is vented via the carburettor air cleaner.
