Snapper 381451HBVE, Safety Instructions & Operator'S Manual

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Section 4 - ADJUSTMENTS & REPAIR
WARNING
DO NOT attempt any adjustments, maintenance,
service or repairs with the engine running. STOP
engine. STOP blades. Engage parking brake. Remove
key. Remove spark plug wire from spark plug and
secure away from plug. Engine and components are
hot. Avoid serious burns by allowing all parts to cool
before working on machine.
4.3 MOWER BLADE DRIVE BELTS – ADJUSTMENT /
REPLACEMENT (continued from previous page)
2. Remove cover to gain access to the belt, idler and
control cable area. The cover is retained to the seat
pedestal with four screws. See Figure 3.4.
3. Visually inspect condition of belt. If worn or
damaged, replace. Refer to Section “ENGINE TO
DECK BELT REPLACEMENT” for instructions.
4. With engine stopped, move blade control lever to
the ON position. The control cable spring should
extend between 3/8” & 1/2”. See Figure 3.5. If spring
extension is less than 1/4”, adjustment is required.
FIGURE 4.3
5. The threaded fitting on the end of the control cable
provides fine tension adjustments. See Figure 4.4.
Loosen jam nuts and turn nuts until spring extension
falls in the range of 3/8" to 1/2". Tighten nuts securely.
Move blade control lever to the OFF position. Install
cover (refer to note below) and tighten screws
securely.
NOTE: If the threaded fitting adjustment did not
produce proper spring extension, leave cover off and
proceed to next step.
FIGURE 4.4
6. If step 5 did not produce the correct spring
extension, the idler pulley will require repositioning.
The idler arm has a series of 4 holes. See Figure 4.5.
The #1 position produces the highest belt tension, #4
the lowest. Remove the idler pulley – noting the
mounting hole location prior to removing bolt.
FIGURE 4.5
7. Reposition the idler pulley one hole at a time in the
desired direction (higher tension or lower tension).
Install bolt and nut. Tighten securely.
IMPORTANT: DO NOT over tension belt. Excessive
tension will adversely affect belt drive function and
can cause damage.
8. Check belt tension. Repeat step 4. Use threaded
fitting on cable for fine adjustment (refer to step 5).
DO NOT exceed 1/2” spring extension.
NOTE: The rear deck brackets are slotted where they
attach to the deck. This provides adjustment to
accommodate variations in belt length. Loosen nuts
(4) and slide deck forward to increase engine to deck
belt tension.
#4 - LOWEST
TENSION
#1 - HIGHEST
BELT TENSION
CONTROL CABLE TENSION
ADJUSTMENT. MOVE NUTS.
INCREASE
TENSION DECREASE
TENSION
NOTE: POSITION BELT GUIDES 1/8” FROM BELT WITH
BLADE CONTROL ON (ENGINE OFF).
CONTROL CABLE SPRING EXTENSION RANGE 3/8” &
1/2”
BELT GUIDES