Chapter 4 Fuel and exhaust systems
4-27
Accelerator pump
inlet check ball
Anti-overfill device
Accelerator
pump outlet
Check weibt
and ball
14.21 Remove the check weight and ball from the
14.22 Remove the accelerator pump mounting screws
accelerator pump outlet and remove the steel ball
and remove the pump cover link assembly, diaphragm,
of the anti-overfill device spring, body and gasket from the carburetor
Pin’
14.23 Remove the snap-ring from the sub-EGR control
valve pin
14.31 A universal float level gauge setup for measuring
float height
23 Remove the snap-ring from the sub-EGR control valve pin (see illus-
tration).
24 Remove the pin, then remove the link from the valve. Then take out
the steel ball and spring from the sub-EGR control valve.
* 25 Remove the sub-EGR control valve from the throttle body.
Reassemb&
26 Clean all parts thoroughly in solvent and blow out all air passages with
compressed air before beginning reassembly..
27 Reassembly is the reverse of disassembly. Don’t reuse any old gas-
kets or O-rings. Use the new ones in the carburetor rebuild kit.
28 When replacing jets, make sure the old jet and new jet are the same
size (a No. is stamped on each jet).
29 lnspectthe operation of the throttle and choke linkage, and the sub-
EGR valve. They should operate smoothly.
Float adjustment
Refer to illustrations 14.31 and 14.32
30 Invert the float chamber cover assembly without a gasket.
31 Position a universal float level gauge, or equivalent instrument, as
shown (see illustration). The float level (distance from the bottom of the
float to the surface of the float chamber) should be within the dimension
listed in this Chapter’s Specifications.
Shim
location
14.32 Shim location for float height adjustment shims
32 If it isn’t, the shim under the needle seat (see illustration) must be
changed. Shim kit MD606952 contains three shims f.0118 in., .0157 in.-
and .Oi 96 in.). Adding or removing a shim changes the float level by three
times the thickness of the shim you add or remove.
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