Section 05: COOLING SYSTEM
PA1553
7
pressure caps must be checked periodically for
proper operation.
Recommended phosphate free coolants: Detroit
Diesel “DDC Power Cool” (P/N 23512138) or
Prestone AF977 (bulk) Prevost #685125, 72702
(3.78 L), 70119 (205L), 70102 (4L).
A decal (052635) located on the surge tank
provides information on recommended coolants.
4.6 INHIBITORS
A coolant solution, which has insufficient
inhibitors or no inhibitors at all, invites the
formation of rust, scale, sludge and mineral
deposits within the cooling system. These
deposits can cause water pump seal wear and
coat the interior of coolant system passages.
Heat transfer is reduced as deposits build up,
leading to an overheating condition. Continued
operation with this condition can lead to serious
engine damage: liner scuffing, scoring, piston
seizure and cylinder head cracking. These
damages can occur quickly or over a longer
period of time, depending of location and
amount of deposits. Improperly inhibited
coolants can become corrosive enough to "eat
away" coolant passages and seal ring grooves
and cause leaks to develop. Hydrostatic lock
can occur if leak is internal and accumulates on
top of a piston. The result may be a bent
connecting rod. Cavitation erosion may occur in
improperly inhibited coolants. Cavitation erosion
is caused by the implosion of tiny bubbles
against localized surfaces of the system. Such
implosion causes pinpoint pressures high
enough to erode pump impellers, cylinder liners
and cylinder blocks. In extreme cases, their
surfaces are so deeply pitted that they appear to
be spongy, and holes can develop completely
through them.
4.6.1 Inhibitor Test Procedures
Test Kits are commercially available to check
engine coolant for nitrite concentration. Nitrite
concentration is an indication of Supplemental
Coolant Additive (SCA) level. Nitrite must be
maintained within recommended levels. Coolant
must be tested at each oil change to insure that
inhibitor levels are maintained within the ranges
shown hereafter:
NOTE
Above SCA values with Detroit Diesel #7se298
or TMC RP-329 “Type A”. Use Nalco Chemical
Company nitrite test kits (CO-318). A factory
coolant analysis program is available through
Detroit Diesel distributors under part number
23508774.
DDC Fully Formulated Glycol Coolant Limits
-30 -– 50(°F)
Freeze Point (°F)
125 -– 500 ppm
Boron (ppm)
800 -– 3200 ppm
Nitrite (ppm)
200 -– 750 ppm
Nitrate (ppm)
50 –- 250 ppm
Silicon (ppm)
0 ppm MAX
Phosphorus (ppm)
8.0 -– 11.0
pH
40 ppm MAX
Chlorides (ppm)
100 ppm MAX
Sulfates (ppm)
4.7 COOLANT RECOMMENDATIONS
1.
Always use recommended antifreeze,
inhibitor and water at proper concentration
levels. A 50% coolant/water solution is
normally used as factory fill. Antifreeze
concentration over 70% is not recommended
because of poor heat transfer capability,
adverse freeze protection and silicate
dropout. Antifreeze concentration below 30%
offers little freeze, boilover or corrosion
protection.
2. Use only ethylene glycol antifreeze meeting
the Detroit Diesel #7se298 or TMC RP-329
“Type A” formulation.
3. Use an antifreeze solution year-round for
freeze and boil-over protection. Seasonal
changing of coolant from an antifreeze
solution to an inhibitor/water solution is
recommended.
4. Pre-mix coolant makeup solutions at proper
concentrations before adding to the cooling
system.
5. Maintain the prescribed inhibitor strength
levels as required.
6. Do not mix different base inhibitor packages.
7. Always maintain proper coolant level.
Содержание LE MIRAGE XLII
Страница 1: ...COACH MANUFACTURER MAINTENANCE MANUAL LE MIRAGE XLII BUS SHELLS PA1553 ...
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Страница 13: ...Section 00 GENERAL INFORMATION PA1553 11 FIGURE 14 CONVERSION CHART 00006 ...
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Страница 419: ...SPICER SPECIALITY AXLE DIVISION place product photo here SERVICE MANUAL GENERAL INFORMATION NDS Axle range ...
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Страница 438: ...Page No 12 NDS2 issue A Spicer SpecialityAxle Division Technical Publications Spicer Speciality Axle Division ...
Страница 464: ...Page No 18 Manual No NDS8 Spicer Speciality Axle Division Technical Publications Spicer Speciality Axle Division TP1193 ...
Страница 492: ...Section 12 BRAKE AND AIR SYSTEM PA1553 20 FIGURE 38 AIR OPERATED BRAKING SYSTEM W0 WE ...
Страница 493: ...Section 12 BRAKE AND AIR SYSTEM PA1553 21 FIGURE 39 AIR OPERATED BRAKING SYSTEM W5 ...
Страница 500: ...Section 12 BRAKE AND AIR SYSTEM PA1553 28 FIGURE 46 ABS 4S 4M CONFIGURATION ...
Страница 528: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA ...
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Страница 844: ...Section 16 SUSPENSION PA1553 22 FIGURE 26 SWAY BAR FRONT SUSPENSION 16138D FIGURE 27 SWAY BAR REAR SUSPENSION 16014 ...
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Страница 1162: ...Section 22 HEATING AND AIR CONDITIONING PA1553 16 FIGURE 16 REFRIGERANT CIRCUIT CENTRAL SYSTEM 22247 ...
Страница 1165: ...Section 22 HEATING AND AIR CONDITIONING PA1553 19 FIGURE 17 DOUBLE SWEEP EVACUATION SET UP ...
Страница 1186: ...Section 22 HEATING AND AIR CONDITIONING PA1553 40 FIGURE 42 REFRIGERANT CIRCUIT SMALL SYSTEM 22336 ...
Страница 1191: ...Section 22 HEATING AND AIR CONDITIONING PA1553 45 FIGURE 50 CENTRAL HEATING SYSTEM COMPONENTS 22338 ...
Страница 1201: ...Section 22 HEATING AND AIR CONDITIONING PA1553 55 FIGURE 64 HEATER LINE SHUTOFF VALVES WE W0 ...
Страница 1202: ...Section 22 HEATING AND AIR CONDITIONING PA1553 56 FIGURE 65 SMALL HEATING SYSTEM COMPONENTS 22337 ...
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Страница 1209: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R ...
Страница 1210: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT ...
Страница 1233: ...Compressor 62 11053 Rev B SERVICE PARTS LIST for MODEL 05G TWIN PORT COMPRESSOR 1 2 3 4 5 6 R ...
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Страница 1287: ...Section 24 LUBRICATION PA1553 5 FIGURE 2 LUBRICATION AND SERVICING POINTS ON INDEPENDENT FRONT SUSPENSION VEHICLES 24036 ...
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Страница 1305: ...Section 26 XLII SLIDE OUT PA1553 11 ...
Страница 1306: ...Section 26 XLII SLIDE OUT PA1553 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION ...