Parking Brake Adjustment - Snapper NZM21521KWV Safety Instructions & Operator's Manual

Section 5 - ADJUSTMENTS & REPAIR
WARNING
DO NOT attempt any maintenance, adjustments or
service with engine running. STOP engine. STOP
blades. Set brake. Remove key. Remove spark plug
wires and secure away from spark plugs. Engine
and components are HOT. Avoid serious burns,
allow sufficient time for all parts to cool.
5.2.1. MOWER DECK ADJUSTMENT (LEVELNESS)
SIDE to SIDE and FRONT to REAR
7. Loosen the nuts that secure both rear deck
support eyebolts (slotted brackets on 61, See Figure
5.5). Adjust to remove slack from both rear chains.
Tighten nuts securely. See Figure 5.6.
FIGURE 5.6
8. Move deck lift lever and set the mower deck to
the highest cutting position and recheck side to side
blade tip dimensions. The difference between the
two should be 1/8" or less.
NOTE: The deck timing rod is preset at the factory
and requires no adjustments. See Figure 5.7.
9. The leveling blocks used in Step 4 should result
in a proper deck pitch. If a pitch adjustment is
required, use the two rear deck support eyebolts
(slotted brackets on 61). Adjust up or down as
required.
10. Reinstall deck lift assist spring. Place deck in
highest cutting position. Tighten nut on eyebolt until
1 1/4" of threads (2 1/4" for 61" decks) protrude
past end of nut. See Figure 4.9.
Do not operate this machine if the brakes are not
functioning properly!

5.3 PARKING BRAKE ADJUSTMENT

LOOSEN NUTS AND
POSITION CHAIN
UNTIL TIGHT
21
DECK TIMING ROD
NO ADJUSTMENT REQUIRED
FIGURE 5.7
WARNING
The parking brake can be adjusted by rotating hex
nut clockwise to increase brake tension. If this
adjustment does not result in proper braking action
contact your authorized SNAPPER dealer for
corrective action. See Figure 5.8.
1. Disengage parking brake. Measure the relaxed
length of the brake spring.
2. Engage parking brake. Length of spring should
decrease 3/8". Adjustment is required if less than
3/8".
3. Loosen jam nut.
4. Tighten hex nut to compress brake spring 3/8".
Tighten jam nut to secure the hex nut in place.
Disengage and engage parking brake and recheck
brake spring compression measurement. Repeat
previous steps for other wheel. See Figure 5.8.
3/8"
COMPRESS
PARKING BRAKE
FIGURE 5.8