TM 5-3895-346-14
COOLANT FILTER AND CONDITIONER
ENGINE OVERHAUL
Filter Maintenance
Replace the chemically-activated element, following the
manufacturer's recommended change periods (refer to
Preventive Maintenance). The lower corrosion resistor
plate (if used) must be buffed each time (discard the
plate if excessive metal loss or pitting is evident) to
ensure effective protection of the cooling system.
If the filter is installed on an engine which has previously
been in service, it may be necessary to change the filter
element two or three times at intervals of approximately
200 hours or 6,000 miles, or less, to clean-up
accumulations of scale and rust in the cooling system.
It is advisable to drain and flush the system during these
initial change intervals.
Makeup water up to
approximately 40% of the total capacity of the cooling
system may safely be added before a filter element
change is required.
If it is necessary for any reason to drain the cooling
system before an element change, the treated water
should be saved and reused. If the treated water is
discarded, a new filter element must be installed since
the protective agents in the used filter will have been
partially consumed in treating the discarded water.
Figure 3. Coolant Filter and Conditioner
(Clamp-On-Type)
Service
The coolant filter may be grounded at the option of the user.
The current coolant filter includes a nonchromate type element. This element can be used in place of either of
the former filter elements (permanent-type antifreeze or plain water-type) and thus provides year-round cooling
system protection. The current and the former filter elements are completely interchangeable in the former
filter can.
Replace the element and service the filter and conditioner as follows:
1.
Close the filter inlet and outlet shutoff valves. If shutoff valves are not provided, vise grip pliers
can be used to clamp each hose closed during the filter change. Use caution to avoid damaging the hoses with
the vise grip pliers.
2.
Canister-Type Element:
a.
Remove the drain plug in the bottom of the filter body and let drain.
b.
Remove the filter cover-to filter body bolts.
c.
Remove and discard the element.
d.
Remove and discard the corrosion resistor plates.
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