PERIODIC SERVICE 56 C Adjusting procedures 1. Loosen the lock nut and turn the tie rod to adjust the rod length until the proper toe-in measurement is obtained. 2. Retighten the lock nut. B Cleaning Spark Arrester To avoid personal injury: A After operating the engine, do not touch the muffler, exhaust pipe, or spark arrester until they have had sufficient time to cool. A Tightening torque: 74.0 to 84.0 N-m (7.6 to 8.5 kgf-m) (55 to 61 lbf-ft) This screen type spark arrester was examined, tested, and qualified in accordance with the USDA Forest Service Standard 5100-1c.
C Maintenance and cleanout procedure The screen type spark arrester should be removed, cleaned, and inspected after every 100 hours of use. 1. The spark arrester is located inside the end of the exhaust pipe, and is fastened with 2 bolts. 2. Unfasten the bolt and remove the spark arrester. 3. Shake loosened particles out of the screen assembly and lightly clean the screen with a wire brush. Soak in solvent and again clean with wire brush if necessary. 4. If any breaks in the screen or weldments are discovered, the assembly must be replaced. 5. Return the spark arrester to the exhaust outlet, align the bolt holes and refasten the bolt.
(1) Lock nuts (2) Tie-rod A USDA approval requires clearance between spark arrester sleeve and exhaust pipe to be no larger than 0.023" (0.584 mm). A Keep the length of the left and right tie-rod equal. (1) Spark arrester (2) Bolt (3) Muffler