Chevrolet 10 Series 1968, Service Manual

Page: 493 / 713

CLUTCHES AND TRANSMISSIONS 7-30
7. Install poppet balls, springs, retainer, and poppet 8 . Move rod (1) to neutral position, tighten fork clamp
screws. screw (4) firm ly and retain with lockwire (3).
MANUAL TRANSMISSION CONTROL LINKAGE
TRANSMISSION LINKAGE ADJUSTMENT
3-Speed Column Shift
In cases where gearshift linkage has been disconnected
or removed, proper adjustment sequence is important.
1. Install control rods to both second and third shifter
lever and first and reverse shifter lever. Set both
shifter levers in neutral position.
2. Align both shifter tube levers on mast jacket in the
neutral position. Install gauge in holes of levers to
hold levers in alignment. Position relay levers so
that gearshift control lever is in neutral position.
3. Connect control rods to tube levers making sure
clamps are properly adjusted so that tube levers and
transmission shifter levers remain in their neutral
positions while tightening.
4. Remove gauge and move selector lever through all
positions to check adjustment and insure over-travel
in all positions.
NOTE: If mast jacket lower dash clamp has
been disturbed at its mounting on dash, its ad­
justment to the steering mainshaft should be
checked as outlined in the procedure in Section
9 of this manual.
Tilt Cab Models
NOTE:
Key numbers in text refer to Figure 2D.
1. Place transmission selector and shift levers (9) in
"N E U TR A L” position.
2. Adjust selector and shift rods (
8
) to provide 90°
angularity at the lower end of the gearshift lever ( 1 )
to the control island panel ( 2 ) as shown.
Adjustment is accomplished by rotating the adjust­
able clevis (see Inset, fig. 2D) at either the control
F ig . I D —Steering Column G earshift
island or transmission end of the selector and shift
rods ( 8 ). Tighten lock nuts securely.
3. Check adjustment by moving gearshift lever through
the shift pattern. There must be no binding in the
linkage.
NOTE:
At the extreme selector and shift move­
ments, clevis pins should rotate freely. Re­
adjust linkage, if necessary, to obtain these
conditions.
4. Replace any worn or damaged cotter pins.
5. Lubricate control linkage as described in LUBRICA­
TION (Section 0) of the Truck Service Manual.
CONTROL ISLAND SHIFT MECHANISM
On Tilt Cab Models with Clark, New Process, Fuller
or Spicer transmission, if shift controls at control is ­
land panel become worn or damaged, make repairs as
described in the following text:
Removal
NOTE: Key numbers in following text refer to
Figure 3D.
1. At the control island panel, disconnect shift rod ( 6 )
from shift finger (10). Also, disconnect selector rod
(7) from selector finger (9).
2. Remove shift mechanism assembly-to-control island
panel attaching parts and then remove assembly
from vehicle.
3. Remove gearshift knob, boot retainer (1) and boot (2).
Disassem bly
NOTE: Key numbers in following text refer to
Figure 3D.
1. Remove cotter pin and washer from selector finger
pin (3), then remove selector finger (9).
2. Remove lockwires from pivot screws (5), then re ­
move pivot screws, washers and selector finger
strap and pin assembly (
11
).
3. Remove gearshift lever (14).
4. Using hammer and punch, remove roll pin (12), pivot
pin (13), and then remove shift finger (10) from
control cover (4).
Cleaning and Inspection
1. Clean all parts thoroughly in cleaning solvent. Wipe
or blow parts dry.
2. Check all parts for wear, distortion, cracks, or other
damage.
3. Replace all parts that would affect proper selection
of transmission gears.
Assem bly
NOTE: Key numbers in following text refer to
Figure 3D.
CHEVROLET TRUCK SERVICE MANUAL