Frontier ST7526, Operator'S Manual

Page: 37 / 44

AUGER SHEAR BOLT REPLACEMENT
The augers are secured to the auger shaft with special bolts that
are designed to break if an object becomes lodged in the auger
housing. Use of a harder bolt will reduce the protection provided
by the shear bolt. To replace a broken shear bolt, proceed as fol-
lows:
WARNING: To insure safety and performance levels, only
original replacement shear bolts should be used.
1. Stop the engine, disengage all controls, disconnect the spark
plug lead wire, and make sure all moving parts have stopped.
2. Align the hole in the auger with the hole in the auger shaft.
Install new shear bolt, spacer and locknut found in the toolbox
located on the belt cover (see Figure 52).
NOTE: The spacer fits into the larger hole in the auger tube.
Figure 52
Spacer
Locknut
Shear Bolt
MAINTENANCE
37
TO ADJUST OR REPLACE THE SPARK PLUG
Check the spark plug every twenty-five ( 25 ) hours. Replace the
spark plug if the electrodes are pitted or burned or if the porcelain
is cracked.
1. Clean spark plug and reset gap periodically.
2. Clean area around spark plug base before removal, to prevent
dirt from entering engine.
3. Replace spark plug if electrodes are pitted or burned or if
porcelain is cracked.
4. Clean spark plug by carefully scraping electrodes (do not
sandblast or use wire brush).
5. Be sure spark plug is clean and free of foreign material. Check
electrodes gap with a wire feeler gauge and reset gap to 0.030"
(0.76 mm) if necessary. If a new spark plug is needed, refer to
REPLACEMENT PARTS Parts section of this manual for prop-
er replacement spark plug.
6. Before installing spark plug, coat threads lightly with graphite
grease to insure easy removal.
7. Tighten plug firmly into engine. If torque wrench is available,
torque plug to 18-23 ft-lbs. (24.2-31.2 Nm).
Figure 53
0.030" (0.76 mm)
Gap