INSTALLATION - TM-10-3930-644-14-P0281

TM 10-3930-644-14&P

5. Oil cooler should be periodically checked for

Cleaning at these intervals will reduce the possibility of

leaks or clogging.

clogging or overheating, and will minimize the necessity

of removing the radiator for special cleaning. If hard

6. If any fractures or breaks are discovered during

water has been used, the necessity for cleaning is even

radiator inspection, then the radiator should be

greater, since lime deposits or scale will form in the

brazed for proper sealing.

radiator, cylinder head and block. This lime deposit is

detrimental to the engine and the radiator core.

D. INSTALLATION

1. Slide the radiator up into mounting position

Flushing the radiator will remove obstructions in the

within the counterweight, ensuring against any

radiator tubes and other water passages, which, if not

damage to filler neck or cooling fins.

removed, would eventually clog these passages. It is

also important that the air passages between the

2. With radiator properly aligned tighten two

radiator tubes be kept free rf obstructions and that the

capscrews through radiator mount to frame

exterior of the engine be kept free from thick deposits of

support bars.

dust and oil. The following procedure is recommended

to properly clean and flush the cooling system:

3. Install grille and secure grille and radiator with

two capscrews. Secure grille with two remaining

1. Sal Soda is a very effective and safe solvent for

capscrews.

removal of lime, scale and other foreign deposits

in the cooling system. It should be used in the

proportions indicated and according to the

NOTE

directions printed on the container in which it is

The oil cooler lines will have

to be

purchased. Many good cleaning solvents for

replaced and tightened.

this purpose are on the market; they should

4. Replace the upper and lower radiator hoses and

always be used according to directions.

secure the retaining clamps.

If hoses are

cracked or cut, they must be replaced.

CAUTION

Never mix anti-freeze compounds or

5. After radiator is installed, measure the distance

inhibitors

with

any

cleaning,

between the leading edge of the fan blades and

neutralizing or flushing compounds

the radiator core. This dimension should be

approximately 7/8". Also ensure that the cooling

2. After the solvent has been in the cooling system

fan is properly centered within the radiator

the prescribed length of time, the system should

shroud.

be completely drained, and after the engine has

cooled sufficiently, thoroughly flush with clean

6. Close the cooling system drain cocks beneath

water.

radiator and in engine block and fill system to

recommended capacity with coolant, replace the

3. The use of certain cleaning compounds

radiator pressure cap and check for leaks.

resources the use of a neutralizer solution which

is usually packed and sold with the cleaning

compound, and should be used as directed.

NOTE

Allow engine to reach normal(160 F)

4. If radiator is badly clogged, then reverse flushing

operating

temperature.

The

is required.

(Refer to Paragraph C,

thermostat will then open and the

INSPECTION/SERVICE, this Topic).

coolant will flow into the engine.

Coolant level must then be 'topped-

5. After the cooling system has been cleaned or

up'.

flushed, and before new coolant is added to the

system, a complete inspection should be made

7. Replace the engine side panels and lower the

to detect and correct any leaks that may have

operator's seat.

been uncovered.

E. CLEANING AND FLUSHING

a. Inspect all hoses and fittings for signs of

It is recommended that the cooling system be cleaned at

deterioration. Replace as is necessary.

least twice a year, usually at the beginning of the cold

b. Check the cylinder head capscrews, hose

weather season and before the anti-freeze solution is put

clamps, and fitting connections. Tighten

into the system.

or replace where necessary.

R-155-1

3-111