ARMY TM 9-6115-604-12
NAVY NAVFAC P-8-633-12
(a) Lubricate threads of fittings with sealing compound MIL-S-45180, Type II, before installation.
(b) Attach radiator inlet hoses (33) and water inlet tube (34) using hose clamps (11).
(c) Attach radiator outlet hoses (31) and water outlet tubes (32) using hose clamps (26 and 30).
(d) Install hose assembly (25) using straight adapters (29), pipe bushing (27), and elbow (28). Secure with
hose clamps (26).
(e) Install radiator drain hose (19) using elbow (24), pipe nipple (23), shut off cock (22), straight adapter (21),
and hose clamps (20) and clamps (47).
(f) Install hose assembly (10) using reducer (13) and pipe adapters (14) and secure with clamps (11) and
(g) Install overflow hose (8) and secure with hose clamp (9) and clamps (47).
(h) Refill the radiator in accordance with step b, above.
Inspect Sight Gage. Inspect the sight glass assembly (45, Figure 3-17) for damage, leaks, and secure mounting.
Refer to the next higher level of maintenance for repair or replacement If necessary, service the radiator in
accordance with step b(2), above.
Maintenance of Fan Belt. See Figure 3-3.
(1) Inspect. Inspect the fan belt for cracking, glazing, fraying, or other signs of excessive wear. Make sure belt
tracks are riding in pulley grooves. Since the fan belt Is only visible from the top of the engine, it will be
necessary to bar the engine over. Refer to Figure 3-3.
The barring mechanism is spnng loaded to disengage. Whenever the retaining pin is
positioned in the barring mechanism groove, the barring mechanism is disengaged.
(a) Remove the retaining pin and ensure the barring mechanism engages.
(b) Using a wrench on the barring mechanism, bar the engine over as necessary to Inspect the fan belt.
This task requires two people.
(a) Remove right and left hand fan shrouds (1 and 2, Figure 3-17) and top, bottom, and center grills (6 and
7) as necessary to gain access to fan belt by removing hexagonal nuts (4), lockwashers (5), and hexagon
head capscrews (3).
(b) Using a wrench, relieve tension on idler assembly from fan belt.
(c) Remove belt from bottom pulley. Cut unserviceable belt or remove by working belt over fan.
(d) Install replacement belt by working over fan. Pry idler assembly away from crankshaft to slip on belt. Be
sure that tracks on belt mate with grooves of all two pulleys.
(e) Install right and left hand fan shrouds and grills as per step (a), above.
Inspect Idler Pulley Assembly. See Figure 1-6. Inspect pulley for cracks, pits, or damage.
Maintenance of Fan Shrouds and Grills.
(1) Inspect. See Figure 3-17. Inspect the right and left hand fan shrouds (1 and 2), center grills (7), and top and
bottom grills (6) for obvious signs of damage. Ensure that there are no tears in the grills. Check security of