12
Section 4 - REPAIR & ADJUSTMENTS
WARNING
DO NOT attempt any maintenance, adjustments or
service with engine and blade running. STOP engine
and blade. Remove key. 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. Wear
heavy leather gloves when handling or working
around cutting blades. Blades are extremely sharp
and can cause severe injury.
4.1 MOWER BLADE REPLACEMENT
4.1.2. BLADE SHARPENING
(Continued From Previous Page)
4.
Sharpen blade on a grinding wheel at an angle of 22
to 28 degrees. DO NOT sharpen blade beyond original
cutting edge. See Figure 4.3.
FIGURE 4.3
5.
Check blade for balance. If necessary, correct
balance by grinding heavy end of blade.
6.
Reinstall blade. See Figures 4.2 & 4.3. Check
torque of blade retaining cap screw. Recommended
torque should be 30 to 40 ft. lbs.
4.2 WHEEL DRIVE CONTROL ADJUSTMENT
(Engine To Transmission Drive Belt)
The wheel drive control requires periodic adjustment
to maintain proper engine to transmission drive belt
tension. The adjustment is located on the right
handle and requires no tools. See Figure 4.4.
IMPORTANT:
DO NOT operate engine when
inspecting or adjusting the drive belt.
1.
Visually check engine drive belt for cracking,
fraying, severed or belt strands exposed. Replace
belt before operating mower.
2.
To check for proper drive belt tension. STOP
engine. Shift ground speed control to 1
st
and engage
the wheel drive control.
3.
With the wheel drive control engaged, pull the
mower handles, moving the mower rearward.
Observe the rear wheels.
4.
If the rear wheels slide on the surface (no
rotation) the belt is properly tensioned and the
control does not require adjustment.
5.
If the rear wheels rotate, increase belt tension by
rotating the thumb screw COUNTER-CLOCKWISE.
6.
Turn thumb screw one turn at a time and recheck
tension (repeating steps 3-5).
7.
When proper belt tension has been set, operate
machine and verify proper wheel drive control
function.
IMPORTANT:
DO NOT over-tighten wheel drive control.
DO NOT operate if control or drive does not function
properly. Contact your local SNAPPER Dealer for
assistance.
IMPORTANT:
If machine creeps forward after wheel
drive control is released the cable is too tight and must
be readjusted to eliminate all forward movement.
Machine must not have any forward movement when
wheel drive control is disengaged. If the wheel drive
control fails to return quickly to the “OFF” position when
released, check for a broken, binding, or kinked cable.
FIGURE 4.4
*DO NOT SHARPEN
BEYOND ORIGINAL
CUTTING EDGE OF
BLADE
ORIGINAL CUTTING EDGE
22º TO 28º
HOLD BLADE
CONTROL AGAINST
HANDLEBAR AND
ENGAGE WHEEL
DRIVE CONTROL
WHEEL DRIVE
CONTROL
THUMBWHEEL
ADJUSTER
