10. ALL MOTOR BEARINGS. To be lubricated only at time of disassembly. After lubrication, remove fittings and
Cooling system is pressurized. Remove radiator cap slowly and only when engine has cooled below +120
(+49 ) or painful burns could result.
Do not add cold coolant to a hot engine or engine may be damaged. Allow engine to cool below +120
(+49 ) before adding coolant.
Check coolant level in radiator. Coolant should be 1 in. (2.5 cm) from bottom of filler neck. If coolant is low,
add a 50/50 mixture of antifreeze and water to radiator until proper level is reached.
Change coolant every two years, or 6000 hours, whichever comes first. When changing coolant, DCA4
corrosion inhibitor must be added to cooling system by installing precharge filter WF2053. Test coolant for proper
amount of inhibitor: There should be between one and two units of DCA4 corrosion inhibitor per gallon of coolant
(water and antifreeze). Refer to TM 53820-205-20-1.
12. COOLANT FILTER. Change coolant filter each time the engine lubricating oil is changed, or every 250 to 480
hours if hard time is used. The coolant filter contains four units of DCA4 corrosion inhibitor for replenishment of
coolant inhibitor level. Test coolant for proper amount of DCA4 corrosion inhibitor each time the coolant filter is
changed. Refer to TM 5-3820-205-20-1.
A copy of this Lubrication Order will remain with the equipment at all times. Instructions contained herein are
By Order of the Secretary of the Army:
GORDON R. SULLIVAN
General, United States Army
Chief of Staff
PATRICIA P. HICKERSON
Brigadier General, United States Army
The Adjutant General
To be distributed in accordance with DA Form 12-25-E, Block 4133 Operator and Unit maintenance requirement
CARD 19 OF 19