Bolens 137-465A - Manual (Page 12)

NOTE
Belt tension is automatically main­
tained by the spring on the variable
speed bracket on the drive belts and
the belt tension on the deck belt is
maintained by the two deck springs.
SPARK PLUG
The spark plug gap should be cleaned and reset to
a 0.030-inch clearance every 25 hours of engine
operation. (See figure 22.) Spark plug replacement
if recommended at the start of each mowing
season; check engine parts list for correct plug
type.
NOTE
Whenever the spark plug is removed
for cleaning, it is advisable to re­
place the spark plug gasket with a
new gasket.
FIGURE 22. SPARK PLUG CLEARANCE
REPLACING BLADE
WARNING
j
Before beginning to work on the cut­
ter blade, remove the spark plug
from the cylinder.
Removing and Sharpening Blades. Remove the
center bolt and lockwaher. See figure 23. Pull the
blade and blade adapter from the blade spindle.
The adapter can be removed from the blade by
removing the two adapter bolts , lockwashers and
nuts.
WHEEL ADJUSTMENT
The caster (forward slant of the king pin) and the
camber (tilt of the wheels out at the top) requires
no adjustment. Automotive steering principals
have been used to determine the caster and
camber on the tractor. The front wheels should
toe-in 1 /8 inch.
To adjust the toe-in follow these steps.
1. Remove the elastic locknut and drop the tie
rod end from the wheel bracket.
2. Loosen the hex jam nut on tie rod.
3. Adjust the tie rod assembly for correct toe-in.
FIGURE 24. TIE ROD END
12