Section IV. TROUBLESHOOTING
4-8. Organizational Maintenance Trouble-
This section provides useful information for diag-
Perform troubleshooting functions in accordance
nosing and correcting unsatisfactory operation or
Each malfunction stated is followed by a list of
tests and inspections. Any trouble beyond the
scope of organizational maintenance shall be
reported to direct support maintenance.
Table 4-2. Troubleshooting
Test or Inspection
1. ENGINE KNOCKS.
Step 1. Check for loose flywheel or pulley.
Tighten the flywheel or pulley.
(1) See figure 4-2 for removal of belt guard cover.
(2) Remove the screws holding the belt guard cover to the belt guard body.
(3) Remove the guard cover.
(4) Loosen the engine mounting bolts and slide the engine sufficiently
to remove the belts.
(5) Loosen capscrews and remove drive pulley and key.
(6) Inspect the pulley for cracks and breaks and the key for chips and burrs.
See that the key fits snugly in the keyway.
(1) Install pulley and key and tighten capscrews.
(2) Loosen nut on flywheel hub and remove flywheel and key.
(3) Inspect the flywheel for chips and cracks.
(4) Inspect the key for chips, burrs, and a snug fit.
(5) Install the flywheel and key and tighten nut.
(6) Reinstall the belts and slide the engine until proper tension is obtained on
the belts. Belt deflection should be 0.75 to 1.0 inch (19.05 to 25.4 mm)
midway between pulleys. Tighten the engine mounting bolts.
(7) Install the guard cover by attaching to the guard body with screws.