ARMY TM 9-6115-604-12
NAVY NAVFAC P-8-633-12
Table 3-5. Coolant Test Results and Recommendations
NUMBER OF DROPS,
NITRITE TEST SOLUTION A
RECOMMENDED
FOR COLOR CHANGE IN RED
COOLANT SOLUTION
COOLANT CONDITION
MAINTENANCE
WITH ANTIFREEZE
WITHOUT ANTIFREEZE
0-12
0-6
Dangerous (0 to 0.6 oz per
Precharge system or add
gallon DCA)
make-up DCA
12-17
7-12
Borderline (0.7 to 1.2 oz per
Replace service filter and/or
gallon DCA)
add make-up DCA
18-25
13-20
Acceptable (1 3 to 2.0 oz per
None
gallon DCA)
25-30
20-30
Tolerable (2.0 to 3.0 oz per
None
gallon DCA)
over 30
over 30
Overrated (over 3 0 oz per
Drain part of coolant and
gallon DCA)
make-up with plain antifreeze
and/or water
(d) Install new water filter elements, and tighten until the seals touch the water filter head. Tighten an
additional one-half to three-fourths turn.
(e) Open the valves
e.
Maintenance of Radiator Pipes. Hoses. and Clamps. See Figure 3-17.
(1) Inspect. Inspect the radiator pipes, hoses, and clamps for security. Check for rust or other signs of leakage.
Check hoses for deterioration.
(2) Replace.
(a) Drain the radiator in accordance with paragraph 3-13 b, above.
(b) Remove overflow hose (8) by removing hose clamp (9) and clamps (47).
NOTE
To remove hose assembly (10) unit level maintenance must remove radiator shutter
assembly.
(c) To remove hose assembly (10), loosen hose clamps (11) and disconnect pipe adapter (14) from reducer
(13) and clamps (47).
(d) To remove radiator drain hose (19), remove hose clamps (20), unscrew straight adapter (21), shut off
cock (22), pipe nipple (23), and elbow (24).
(e) To remove hose assembly (25), remove hose clamps (26), unscrew pipe bushing (27), elbow (28), and
straight adapter (29).
(f)
To remove radiator outlet hoses (31) and water outlet tubes (32), remove hose clamps (30).
(g) To remove radiator inlet hoses (33) and water inlet tubes (34), remove hose clamps (11).
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