Air Cleaner - TM-10-3930-626-120048

engine, and operate at fast idle until temperature

Caution: Do not pour cold coolant or

reaches at least 180 degrees F. Continue to operate

water into radiator when engine temperature is

e n g i n e for at least five minutes. Stop engine.

above 200 degrees F. Cold coolant or water,

Remove radiator cap, and open drain cocks on

regardless of engine temperature, will close the

radiator and engine block. Allow system to drain

thermostat and prevent complete filling of

completely. If water is discolored to any extent,

engine water jackets and passages. When filling

repeat the flushing operation.

the system with cold coolant or water, always

operate engine until normal operating tem-

(4) Fill system. Close drain cocks on radiator

and engine block. Pour coolant (consisting of a

perature is reached (thermostat opens); then,

premixed solution of 50 percent antifreeze con-

add coolant or water as required to fill radiator.

forming to Federal Specification O-A-548 and 50

Warning: Radiator cleaning compound

c o n t a i n s acid. Avoid contact with skin. If

percent water) into radiator. Install radiator cap.

Start engine, and allow to operate at fast idle until

contact occurs, wash affected area immediately

temperature gage shows norm al operating tem-

with baking soda solution or with liberal

quantity o f w a t e r . I f c l e a n i n g c o m p o u n d

perature. Stop engine. Remove radiator cap and

check coolant level in radiator. If necessary, add

splashes into eyes, wash immediately with

coolant until level is approximately one inch below

liberal quantity of water and obtain medical aid

top of radiator filler neck. Reinstall radiator cap.

as quickly as possible.

(2) Clean system. Close drain cocks on engine

3-12. Air Cleaner

block and radiator. Pour cleaning compound

a. General. Clean the air cleaner element after

c o n f o r m i n g t o specification MIL-C-10597B

every 75 hours of tractor operation under normal

(ORD) into radiator. Fill radiator with water, and

conditions. When operating under very dusty or

install radiator cap. Start engine and operate at fast

sandy conditions, clean the element daily.

idle until temperature reaches at least 150 degrees

b. Removing, C l e a n i n g , and Reinstalling Air

F. Allow engine to operate at least 30 minutes. Stop

Cleaner Element.

engine. Remove radiator cap, and open drain cocks

(1) Remove wing nut and cover plate from

on radiator and engine block. Allow system to drain

front of air cleaner (fig. 3-3).

completely.

( 2 ) Withdraw element from b o d y o f a i r

Caution: Be sure after using cleaning

cleaner.

compound to flush cooling system thoroughly

(3) Tap element lightly on floor or bench,

as described below. Cleaning compound

being careful not to deform the element. Blow dust

contains a strong acid which if not completely

from plated element with compressed air under

flushed away may attack parts of the cooling

light pressure.

system. Do not attempt to flush the system by

Caution: Do not direct high pressure air

inserting a hose into the radiator with the drain

steam at element. Do not wet the element for

c o c k s open and the engine running. This

cleaning or for any other reason.

procedure will cause the thermostat to close

(4) Reinstall element on air cleaner body with

and stop circulation of water through the

cover plate and wing nut. Tighten wing nut firmly.

engine.

Note. Obtain and install a new filter element after

(3) F l u s h s y s t e m . C l o s e d r a i n c o c k s o n

every 800 hours of tractor operation.

radiator and engine block. Fill cooling system with

clean fresh water, and i n s t a l l radiator cap. Start

3-6