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of the spring. Hold the "U" shackle tightly against the frame bracket and start the upper bushing on the shackle, care being
taken when it enters the thread in the frame, that it is not cross-threaded. Screw the bushings on the shackle about halfway, and
then start the lower bushing, hold the shackle tightly against the spring eye and thread this bushing about halfway, then
alternating from top bushing to lower bushing, turn them in until the head of the bushing is snug against the frame bracket and
the bushing in the spring eye is 1/32" away from the spring measured from the inside of the hexagon head to the spring.
Lubricate the bushings with high pressure lubricant and then try the flex of the shackle, which should be free. If the shackle is
tight, it will cause spring breakage and it will be necessary to rethread the bushings on the shackle.
SHOCK ABSORBERS
The shock absorbers are of the direct action type giving two-way control, however they are not adjustable. They dampen
spring action, as the vehicle passes over irregularities in the road. The shock absorbers are mounted on rubber bushings at both
top and bottom. Should squeaks occur in the bushings, add a flat washer on the mounting pins to place the bushings under
greater pressure and prevent movement between the rubber and metal parts.
DO NOT USE mineral oil to remove squeaks.
CJ2A Operation and Care
Manual -- Proper Maintenance
(part 8 -- Cold Weather Precautions)
With the approach of cold weather, in regions where the temperature drops below the freezing point, precautions must be taken
to prevent freezing of the water in the cooling system. When water freezes it expands and may burst the radiator and cylinder
block.
Be careful to drain the system completely (see COOLING SYSTEM) when putting up the vehicle in cold weather, unless it is
kept in a heated garage or an anti-freeze solution has been added to the water to sufficiently lower the freezing point of the
cooling mixture.
ANTI-FREEZE SOLUTION
It is important that the cooling system be made leak-proof before installing any anti-freeze solution. Should there be any doubt
regarding the condition of either the radiator or heater hoses, replace them.
Common anti-freeze solutions available are alcohol and ethylene glycol. The distillation or evaporating point of alcohol
solution is approximately 170º Fahrenheit. The operating temperatures of the Jeep when used as a farm tractor and especially
when used for belt work through the power take-off is somewhat higher. As a result, alcohol will not be satisfactory to use as
an anti-freeze due to evaporation. Should it be necessary to use it, the solution must be checked often with a hydrometer to
guard against damage due to freezing. Alcohol is satisfactory for highway use, however is must be checked frequently to make
certain that freezing will not occur at anticipated temperatures.
Ethylene glycol has a much higher evaporating point than alcohol, so may be used at higher operating temperatures without
loss of the solution. In a tight cooling system, water only is required to replace evaporation losses, however, any solution lost
mechanically through leakage or foaming must be replaced with additional solution.
The capacity of the cooling system is 11 qts. The following table shows the correct quantity of both alcohol and ethylene
glycol for protection at the various temperatures indicated:
ALCOHOL ETHYLENE GLYCOL
Temp.
Fahr.
U.S.
Qts.
Imperial
Qts.
Metric
Litres
U.S.
Qts.
Imperial
Qts.
Metric
Litres
30º 1 4/5 0.946 1 4/5 0.946
20º 2 1/8 1 4/5 2.011 2 1 2/3 1.892
10º 3 1/4 2 4/5 3.075 3 2 1/2 2.839
0º 4 1/4 3 3/4 4.022 3 3/4 3 1/8 3.549
-10º 5 4 1/8 4.732 4 1/2 3 3/4 4.258
-20º 5 1/2 4 1/2 5.205 4 3/4 4 4.495
-30º 6 3/4 5 2/3 6.388 5 1/2 4 1/2 5.205
-40º 7 1/4 6 6.861 6 5 5.678
The engine should be operated to thoroughly mix the solution.
ENGINE OIL
In cold weather it is important that a lighter grade of engine oil be used so that the engine may be started easily and to assure
an adequate flow of oil to every part of the engine. Use oil having a low cold test which will not congeal at the temperature to
which it will be subjected.
GEAR LUBRICATION
Hard shifting of the transmission gears in cold weather is a positive indication that the transmission lubricant is either too
heavy grade or the quality allows it to congeal at the prevailing temperature. This condition will also probably apply to the
transfer case and the differentials. If the oil is too heavy to allow ease in shifting, it is too heavy to properly lubricate the close
fitting parts. Change the lubricant to a lighter grade without delay.