Speed Control Adjustment - Yard Machines 668 Operator's Manual

DECK ENGAGEMENT ADJUSTMENT
The cutting deck engagement may be adjusted to
make certain deck is disengaged when lift lever is in
the BLADES STOP position. Correct adjustment as
follows.
With the engine off, place the lift lever in the highest
cutting position (first position). Remove the cotter
pin and flat washer which secure the
disengagement rod to the stabilizer shaft assembly.
See Figure 16. Shorten the rod by threading it in
until the ferrule is against the back of the slot in the
lift shaft assembly, and the rod lines up with the
hole in the stabilizer shaft. For more belt tension the
disengagement rod must be lengthened. To
decrease belt tension the disengagement rod must
be shortened.
Check the adjustment by placing the lift lever in the
BLADES STOP position. The deck should move up
and forward, allowing the belt to become loose.
Start and test for disengagement. Repeat procedure
as necessary.
Stabilizer Shaft
Assembly
Disengagement
Rod
Hairpin Cllp [38" Decks I
Stabilizer Shaft Disengagement
Assembly Rod
Spiing
Stabilize ate
Flat Washer
Hairpin Clip I 42" and 1
[46" Decks_
Figure 16
SPEED CONTROL ADJUSTMENT
(See Figure 17)
NOTE:
When operating the unit initially or after
replacing the belts, there will be little difference
between the highest two speeds until after the belts
have gone through a break-in period and have
seated themselves into the pulleys.
If the full range of speeds cannot be obtained on your
unit, adjust the speed control as follows.
1. Adjust the speed control lever by pushing the
clutch-brake pedal forward until the stop on the
brake rod is against the frame. See Figure 17.
Have another person hold the pedal in this
position as you make the following adjustment.
Place the speed control lever in parking brake
position. Remove the hairpin clip and flat
washer, and adjust the ferrule on the rod so it is
against the back end of the slot. See Figure 17.
Then lengthen rod one more turn. Reassemble
and secure with the flat washer and hairpin clip.
2. Adjust the speed control link as follows to obtain
the correct neutral adjustment.
A. Start the engine.
B. Place the shift lever in Neutral position.
C. Place the speed control lever in high speed
position.
D. Release the clutch-brake pedal completely,
then slowly depress the pedal all the way (to
park position). Hold the pedal in this position.
E. Turn the engine off.
F. After engine stops completely, release the
clutch-brake pedal.
G,
H.
Place speed control lever in second position.
Remove the cotter pin and flat washer which
secures the speed control link to the variable
speed torque bracket assembly.
Push the clutch-brake pedal backward by
hand as far as it will go using light pressure.
Hold it in this position as you thread the
speed control link in or out of the ferrule until
it lines up with the pin on the variable speed
torque bracket assembly.
J. Secure speed control link to variable speed
torque bracket assembly with flat washer and
cotter pin.
16