TM 5-3895-369-14
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.
COOLANT INSPECTION
(1) Remove radiator cap.
(a) Inspect coolant in radiator for
oil floating on top. If oil is
present, indicates faulty oil
cooler core. Repair or replace
oil cooler core (para 4-34).
(b) If oil is not present in coolant,
indicates faulty engine oil
pressure switch.
OIL PRESSURE SWITCH TEST
(1) Open left engine door (para 2-14).
(2) Remove oil pressure switch
(3) Power up STE/ICE-R to vehicle battery
source (TM 9-4910-571-12&P, in
TK mode).
(4) Run pressure test #50
(a) Minimum oil pressure at idle
should read 10 psi (69 kPa), at full
speed minimum oil pressure
should read 30 psi (207 kPa). If
faulty, replace switch (para 4-83).
(b) If oil pressure switch is OK,
indicates faulty oil pressure
gauge.
OIL PRESSURE SWITCH
4-85
