Chevrolet 70 1969 Series, Shop Manual

Page: 413 / 913

TRANSMISSIONS AND CLUTCHES 7A-8
Figure 9 -T V Linkage (Model TV70)
fig. 8). With the accelerator pedal depressed to
the thru-detent position (detent button (E) - com ­
pressed) ample clearance must exist between the
pedal and floor, to assure complete movement of
the T V linkage to the thru-detent position.
5. With the accelerator pedal (D) just touching
detent button (E), the carburetor throttle lever
should be in full throttle position. If adjustment
is required shorten or lengthen rods between
accelerator pedal and carburetor throttle lever
and, if necessary, reposition detent button (E) to
obtain above conditions.
6. Using a tachometer to accurately check
engine rpm, road test or dynamometer test
vehicle to check for full throttle, full load upshift
(5th to 6th). Upshift should occur at approximately
50 rpm below the engine governed speed. If up­
shifts do not occur at specified rpm, adjust as
follows:
a. To raise shift point, shorten rod (H), by
turning clevis (G) one turn at a time until the de­
sired shift point is obtained. Tighten jam nut
securely against clevis.
b. To lower shift point, lengthen rod (H) by
turning clevis (G) off rod one turn at a time until
the desired shift point is obtained. Tighten jam
nut against clevis.
T V L IN K A G E A D J U S T M E N T
- M O D E L TV70 (Refer to Fig. 10)
I M P O R T A N T : Prior to adjustment of the T V
linkage, adjust engine idle speed to 500 rpm and
Figure 10— M anual Shift Linkage (All Models)
adjust accelerator pedal as described in ‘ 'EN G IN E
F U E L S Y S T E M ” (SEC. 6M).
1. Disconnect rods (C) and (F) from lever (A).
2. Insert 1/4-inch diameter rod (B) through
hole in lever (A) and slot in governor bracket (E).
3. Place speed control lever (D) in idle
position. Adjust length of rod (C) for free-entry
into levers (A) and (D). Install attaching parts to
retain lever (C) in position.
4. Position T V lever (G) against rear stop
(rotated away from engine). Adjust length of rod
(F) for free-entry into (A) and (G). Install attach­
ing parts to retain lever (F) in position.
5. Remove 1/4-inch diameter rod (B) and
manually check linkage for proper movement.
6. Using a tachometer to accurately check
engine rpm, road test or dynamometer test
vehicle to check for full throttle, full load upshift
(5th to 6th).Upshift should occur 50 rpm below the
engine governed speed. If upshifts do not occur at
specified rpm, adjust as follows:
a. To raise shift point, shorten rod (F) until
the desired shift point is obtained.
CHEVROLET SERIES 70 -80 H EAVY DUTY TRUCK S H O P M A N U A L