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MAINTENANCE
Crusader
MC-8
[ ''°'~6_-7 _ _ _ DATE__cJ:c...cc...ul' - -+--' y ,' - -1_97_3 _ _ ] .
MANUAL
Figure 6 - 3: Perry Water Filter
manufacturers in their coolant filters. The magnesium
plate will be attacked by solutions which will not be
detrimental to other metals in the cooling system.
The dissolved magnesium will be deposited in the
hottest zones of the engine where heat transfer is
more critical refer illustration C. The use of
aluminum or zinc in preference to magnesium is
recommended to eliminate this type of deposit.
High chloride coolants will have a detrimental ef-
fect on the water softening capabilities of systems
using ion-exchange resins. Accumulations of calcium
and magnesium ions removed from the coolant and
held captive by the zeolite resin can be released into
the coolant by a regenerative process caused by high
chloride content solutions.
Commercially packaged, inhibitor systems are
available which can be added directly to the engine
coolant or to bulk storage tanks containing coolant
solution. Both chromate and non-chromate systems
are available and care should be taken regarding
inhibitor compatibility with other coolant con-
stituents, refer illustration B.
A non-chromate inhibitor system recommended for
use in engines. These systems can be used with either
water or ethylene glycol antifreeze solutions and
provide corrosion protections. One of the approved
non-chromate
inhibitor
systems
Nalcool
2000
(Nalfleet 9000 for marine application) offers the ad-
ditional advantages of a simple on site test to deter-
mine protection level and since this product is added
directly to the coolant, it requires no additional hard-
ware or plumbing.
SPIN-ON TYPE FILTER
DESCRIPTION
Also available as optional equipment is a spin-on
type filter with sacrificial plates can be installed in
the cooling system. The spin-on filter can be reached
for service through the right rear engine compartment
service door.
NOTE: Recommended intervals for changing filter
cartridge is every 500 hours or 20,000 miles.
ANTIFREEZE SOLUTIONS
DESCRIPTION
When freeze protection is required an ethylene
glycol base permanent antifreeze should be used. An
inhibitor system is included in this type of antifreeze
and no additional inhibitors are required on initial
fill if a minimum antifreeze concentration of 30% by
volume is used. Solutions of less than 30% con-
320
300
260
I
/-
260
~-tl_
. .
.•
240
220
T
200
-~·
.:;'
..,..__
..,..~
i"'-
--
-·
--,-
I
I
E
180
·coCLl,NT FkEEZING
a.
--
!OILING TcM~ERATURES
M
p
160
E
140
VS
----
_ANTI-FREEZE CONCENTRATION
I
I
I
-F~EEZl";G PO
1
1NTS
BOILING POINTS
R
120
I
A
T
100
u
80
R
60
-
E
(Fo)
40
20
0
-20
-40
-60
.--(•SEA L::VELJ -
rtECOM.'.'.ENDE0
~
CONCE~fflATION
.....
RANGE 30-67o/. - '
-.....
~
.
'
-
~
-
' ~
~
,
. .
_,I
~, . - -
"~
I
I
\.
,
f - -
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-80
0
10
20
30
40
50
60
70
GO
90
100
Anti-freeze Concentration (% By Volume)
ILLUSTRATION D
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