Suspension lockout system test (M741A1).

Page Title: Suspension lockout system test (M741A1).
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MIL-C-62310A(AT)

4.7.15 Welding repairs and burning examination. To determine conformance to 3.4.15, all

welding repairs and burning operations shall be examined to determine that slag has been

removed and approved procedures have been followed.

4.7.16 Suspension lockout system test (M741A1). To determine conformance to 3.4.16,

suspension lockout system shall be engaged and disengaged. Interlock mechanism shall be

tested by trying to operate vehicle with interlock engaged. During engagement of the lockout

system, turn engine off and verify that the system does not leak and to insure vehicle stability for

a minimum of 20 minutes.

4.7.17 Environmental operation test. To determine conformance to 3.6.1, vehicle shall be

stored and operated at the temperatures specified.

4.7.18 Cooling systems test. To determine conformance to 3.6.2.1, 3.6.2.2, and 3.6.2.3, the

vehicle shall be operated at specified temperatures and cooling system temperatures measured

during and after the test. Radiator pressure cap shall be pressure tested and shall relieve pressure

within specified range.

4.7.18.1 Deaeration/clearing capacity test. To determine conformance to 3.6.2.1.1, the

engine cooling system shall be subjected to the following test:

4.7.18.1.1 Initial test set-up. A set-up shall be accomplished within the vehicle (figure 2)

and reflect the following:

a. Sight glasses, pressure pick-ups, flow meter, and air injection provisions shall be

installed in accordance with figure 2.

b. Thermostat shall be installed and blocked open.

c. Pressure cap shall be installed.

d. Coolant - fresh water.

4.7.18.1.2 Initial test conditions. Initial test conditions shall be as follows:

Engine speed - shall be maximum governed speed.

Engine shall be operated at no load.

Coolant flow shall be 70 gpm (min).

Coolant temperature shall be 180 5F.

Coolant level shall be at 12 .5 gallons.

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