(2) Immerse oil cooler in solution of one pan
(1) Insert a smaller OD tube inside damaged tube.
muriatic acid and nine parts water after adding 1 lb. of
(2) Cut and flare ends and solder securely. Do not
oxalic acid and 0.01 gal. of pyridene to each 5 gal. of
burn tubes or header material with torch.
(3) Remove core when bubbling stops, normally 30
If more than 15% of element tubes are defec-
to 60 seconds after immersion.
tive, element cannot be repaired.
i4) Place unit in a 5% solution of sodium carbo-
d Replace all preformed packing and gaskets
nate;, Remove when bubbling ceases and pressure, flush
removed during disassembly and removal.
with :lean warm water.
13-15. Reassembly and Installation
e. Flush inside of tubes with clean, light oil after
a. Refer to figure 13-3 and assemble oil cooler in the
both oil and water sides of cooler have been cleaned.
(1) Install bushing (24), drain cock (23), and plug
When an engine failure occurs in which metal
(22) into housing (21).
particles from worn or broken parts are
(2) Lubricate and place new preformed packing
released into the lubricating oil, replace the
(20) in groove of housing (21). Ensure that packing is
oil cooler core.
not twisted and is free of cuts or nicks.
f Clean all other metallic parts with cleaning sol-
(3) Push element (19) carefully into housing (21).
vent, Federal Specification P-D-680; dry thoroughly
Align index marks on housing and element.
with compressed air.
(4) Place retainer (18) and new gasket (17) on
13-14. Inspection and Repair
housing spacer (16). Push spacer (16) over element
a. Check all parts for indications of excessive wear,
carefully and mate with housing (21). Secure with
cracks, or elongation of threads. Replace any damaged
washers (15) and screws (14).
(5) Assemble plunger (13), spring (12), shim (11),
b. Check cooler element for leaks as follows.
and cap (10) to cower (7). Install plug (9).
(1) Clamp a plate with a rubber gasket to each end
(6) Assemble gasket (8) and cover assembly (7) to
of the tube bundle.
housing spacer (16). Secure with washers (6) and
(2) Install an air connection in one of the plates
and attach air hose.
(7) Place assembly on a flat plate with inlet and
(3) Immerse assembly in water heated to 180F
outlet flat on top of plate. Both ends must be on the
and apply approximately 40 psi air pressure. If air bub-
same plant.; torque screws to 3035 ft-lb (41--47 N- m).
bles are observed, element must be repaired or
b Install lubricating oil filter as follows:
(I) Install new gaskets (4) and (3) and position oil
(4) Upon completion of leak check dry element
cooler to right bank water header plate.
with compressed air.
(2) Install washers (2) and screws (1). Tighten
c. Repair damaged tubes in the cooler element as de-
screws to --35 ft-lb torque (41--47 N. m).
Section IV. WATER PUMP
The water pump is a centrifugal pump which circulates
(2) Loosen and remove water pump belts.
water around the cylinder liners, through the cylinder
(3) Loosen hose clamps and remove hoses from
heads and around injector sleeves. The pump is
water pump assembly.
mounted on the front of the engine and belt driven
(4) Remove screws (1) and lock washers (2). Lift
from the crankshaft.
pump from engine block.
13-17. Removal and Disassembly
(5) Remove gasket (3) and scrape all gasket
a Refer to figure 13-4 and TM 5-3810-295-12 and
material from mating surfaces.
remove water pump as described in the following:
&. Disassemble the water pump as follows:
(1) Remove radiator cap and drain the cooling
(1) Pull impeller (4) from pump shaft (12) using a