Do not remove the radiator cap when engine is hot; steam and hot coolant can escape and burn
personnel. Use extreme care when removing radiator pressure cap. Sudden release or pressure
can cause a steam flash which could seriously injure personnel. Slowly loosen cap to the first stop to
relieve pressure before removing cap completely. After use securely tighten cap. Use a clean, thick
waste cloth or like material to remove cap. Avoid using gloves. If hot water soaks through gloves,
personnel could be burned.
DRIVE BELT INSPECTION
(2) Check drive belt for obvious damage.
(a) If damaged, replace drive belt
(b) If drive belt is O K, check drive
(3) Measure drive belt deflection at
longest span of belt. Maximum
deflection is 3/8 to 1/2 inch (9.5 to
(a) If drive belt is not within limits,
replace drive belt tensioner
(b) If drive belt is within limits,
indicates faulty thermostat.
Remove thermostat (pare 4-63) and test according to TM 750-254; replace thermostat as necessary.