Snapper SPV21 User Manual

14
Section 4 - REPAIR & ADJUSTMENTS
WARNING
DO NOT attempt any maintenance, adjustments or
service with engine and blade running. STOP
engine and blade. Disconnect spark plug wire and
secure away from spark plug. Engine and
components are HOT. Avoid serious burns, allow
sufficient time for all components to cool.
4.2 WHEEL DRIVE CONTROL ADJUSTMENT
The wheel drive control lever should engage the
transmission when the lever is squeezed back
against the handlebar, and disengage the
transmission when the lever is released. See
Figure 4.4.
FIGURE 4.4
If the transmission does not fully engage or disengage,
adjustment may be performed as follows:
1. Remove rear cover from mower. Refer to
Section “Rear Cover Removal & Installation”.
2. With wheel drive control lever in ‘DISENGAGE’
position (see Figure 4.4), spring on end of wheel
drive control cable should have no tension.
Measure overall length of unextended spring. See
Figure 4.5.
FIGURE 4.5
(Top of transmission; pulley removed for clarity)
3. Engage lever, and roll mower back and forth
several times to ensure clutch dogs are fully
engaged. With lever engaged, measure length of
extended spring. Overall spring length should
increase by 0.090 – 0.110” (3/32 – 7/64”). See
Figure 4.5a.
FIGURE 4.5a
4. To adjust spring extension:
a. Disengage lever.
b. To increase extended spring length, loosen jam
nut, and rotate ferrule below adjustment
turnbuckle, located on lower end of wheel drive
control cable, ½ turn out from turnbuckle. Tighten
jam nut. See Figure 4.5b.
c. To decrease extended spring length, loosen
jam nut, and rotate ferrule ½ turn in toward
turnbuckle. Tighten jam nut. See Figure 4.5b.
FIGURE 4.5b
5. Engage lever and recheck extended spring
length. Repeat step 4 as needed.
IMPORTANT: INCORRECT ADJUSTMENT CAN
CAUSE DAMAGE TO THE TRANSMISSION.
GROUND SPEED
CONTROL
WHEEL DRIVE
CONTROL
SLOW
FAST
ENGAGE
DISENGAGE
SPRING HAS NO
TENSION
TRANSMISSION
ENGAGE LEVER
(DISENGAGED)
CABLE
MEASURE
UNEXTENDED SPRING
EXTENDED SPRING – SHOULD BE LENGTH OF UNEXTENDED
SPRING PLUS 0.090 to 0.110” (3/32 to 7/64”) EXTENSION
TRANSMISSION
ENGAGE LEVER
(ENGAGED)
FERRULE
ROTATE FERRULE
OUT TO INCREASE
SPRING LENGTH
ROTATE FERRULE IN
TO DECREASE
SPRING LENGTH
LOOSEN JAM NUT
TURNBUCKLE

Snapper SPV21 Specifications

General

Brand	Snapper
Model	SPV21
Category	Lawn Mower
Language	English