1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

ENGINE TUNE-UP 2 -21
2. Hold throttle lever closed and pull cam back until low step
is against but not on set screw (B), Figure 35.
3. Clearance between lower edge of choke valve and air horn
should be 5/8" as shown at (A), Figure 38.
4. Adjust by bending fast idle link at offset portion.
UNLOADER ADJUSTMENT (WGD):
This adjustment must be made after making the fast idle
adjustment.
1. Hold the throttle valve wide open and close the choke valve
as far as possible without forcing.
2. Check clearance between upper edge of choke valve and
inner wall of air horn; this should be 1/8" (use Tool
J-818-5), Figure 37.
3. If adjustment is necessary, bend arm (N) on choke trip
lever (Use Tool T-109-187).
UNLOADER ADJUSTMENT (WA1):
1. Open throttle wide open and check clearance be t we en
lower edge of choke valve and air horn. Clearance should
be 7/16" (A), Figure 38.
2. Adjust by bending cam (B) on throttle lever.
IDLE ADJUSTMENT (WGD):
1. With carburetor Installed on engine, start engine and
allow engine to warm up.
8
Figure 37
FIGURE 39
2. See that choke valve is wide open.
3. Set idle adjustment screws (A), Figure 39, to obtain
smooth idle at 540 to 560 R.P.M. (If car is equipped with
Hydra-Matic, set idle at 490-510 R.P.M.).
4. On eight cylinder engines the normal screw setting is 1 to
1-1/2 turns open, on six cylinder engines 1/2 to 1-1/2
turns open.
IDLE ADJUSTMENT (WA1):
Figure 38
1. Start engine and allow to warm up.
2. See that choke valve is wide open.
3. Set idle adjustment screw (A), Figure 40, to obtain smooth
idle at 540 to 560 R.P.M. If car is equipped with Hydra-
Matic, set idle at 490-510 R.P.M. Cars equipped with