TM 5-3810-307-10
Inspect the boom nose and hook block sheaves for wear. Damaged sheaves cause
rapid deterioration of wire rope.
The use of nylon (nylatron) sheaves, as compared with metallic sheaves, may
change the replacement criteria of rotation resistant wire rope.
The use of cast nylon (nylatron) sheaves, as compared with steel sheaves,
will substantially increase the service life of wire rope. However, conventional rope
retirement criteria based only upon visible wire breaks may prove inadequate in predicting
rope failure. The user of cast nylon sheaves is therefore cautioned that a retirement criteria
should be established based upon the user's experience and the demands of his
application.
2-12.
BATTERIES.
Battery electrolyte must not be allowed to contact the skin or eyes. If this occurs, flush the
contacted area with water and consult a doctor immediately.
When checking and maintaining batteries, exercise the following procedures and
precautions:
Disconnect the batteries.
Wear safety glasses when servicing batteries.
Do not short across the battery posts to check charge. Short circuit, spark, or flame
could cause battery explosion.
Maintain battery electrolyte at the proper level.
Check the electrolyte with a
flashlight.
Check battery test indicator on maintenance-free batteries.
Do not break a live circuit at the battery terminal. Disconnect the ground battery
cable first when removing a battery and connect it last when installing a battery.
Check battery condition only with proper test equipment. Batteries shall not be
charged except in an open, well ventilated area free of flame, smoking, sparks, and
fire.
2-13.
ENGINE.
Be careful when checking the engine coolant level. The fluid may be hot and under
pressure. Shut down the engine and allow the radiator time to cool before removing the radiator
cap.
Shut down the engine and disconnect the battery before performing maintenance. If unable
to do so for the task required, keep hands clear of the engine fan and other moving parts while
performing maintenance.
