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Freightliner FLA/FLB/FLC/FLD/FLL. Manual - part 12

Engine Cooling System Capacity for FLD 112

Engine Make

Engine Model

Radiator Core and
System Capacity

quarts (liters)

Cummins

6CTA8.3

35.0 (33.1)

L10

33.0 (31.2)

System capacity includes all hoses, fittings, and the heater core.

Table 3, Engine Cooling System Capacity for FLD 112

Approved Antifreeze

Manufacturer

Antifreeze

Type

Caterpillar

Caterpillar Diesel
Engine
Antifreeze/Coolant

Contains
supplement
additives.
Available as a
premixed solution.

Cummins

Fleetguard

Compleat
Premix

Premixed solution
with supplement
additives

Approved Antifreeze

Manufacturer

Antifreeze

Type

Detroit Diesel

Detroit Diesel
Power Cool

Premixed solution
with supplement
additives

Old World
Industries

Fleet Charge

™

With supplement
additives

Table 4, Approved Antifreeze

Maximum Coolant Protection in °F (°C) at Various Antifreeze Concentrations

Cooling

System

Capacity:

gal (L)

Ethylene-Glycol Base Antifreeze Required:

gallons (liters)

2 (8)

3 (11)

4 (15)

5 (19)

6 (23)

7 (26)

8 (30)

9 (34)

10 (38)

11 (42)

12 (45)

10 (38)

(–9)

(–16)

–12

(–24)

–34

(–37)

–62

(–52)

†

11 (42)

(–8)

(–13)

–6

(–21)

–23

(–31)

–47

(–44)

–62

(–52)

†

12 (45)

(–7)

(–12)

(–18)

–15

(–26)

–34

(–37)

–57

(–49)

13 (49)

(–6)

(–11)

(–16)

–9

(–23)

–25

(–31)

–45

(–43)

–62

(–52)

†

14 (53)

(–9)

(–14)

–5

(–19)

–18

(–28)

–34

(–37)

–54

(–48)

15 (57)

(–9)

(–13)

(–18)

–12

(–24)

–26

(–32)

–43

(–42)

–62

(–52)

†

16 (61)

(–8)

(–12)

(–17)

–8

(–22)

–19

(–28)

–34

(–37)

–52

(–47)

–62

(–52)

†

17 (64)

(–8)

(–11)

(–15)

–4

(–20)

–14

(–26)

–27

(–33)

–42

(–41)

–58

(–50)

18 (68)

(–7)

(–10)

(–14)

(–18)

–10

(–23)

–21

(–29)

–34

(–37)

–50

(–46)

–62

(–52)

†

19 (72)

(–7)

(–9)

(–13)

(–17)

–7

(–22)

–16

(–27)

–28

(–33)

–42

(–41)

–56

(–49)

Engine Cooling/Radiator

Heavy-Duty Trucks Maintenance Manual, January 2007

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Maximum Coolant Protection in °F (°C) at Various Antifreeze Concentrations

Cooling

System

Capacity:

gal (L)

Ethylene-Glycol Base Antifreeze Required:

gallons (liters)

2 (8)

3 (11)

4 (15)

5 (19)

6 (23)

7 (26)

8 (30)

9 (34)

10 (38)

11 (42)

12 (45)

20 (76)

(–9)

(–12)

(–16)

–3

(–19)

–12

(–24)

–22

(–30)

–34

(–37)

–48

(–44)

–62

(–52)

†

For cooling system capacities not shown, the required amount of antifreeze can be calculated, using the following: Ethylene-glycol base antifreeze in a 25%

solution protects to 10°F (–12°C), 33% to 0°F (–18°C), 40% to –12°F (–24°C), 50% to –34°F (–37°C), and 60% to –62°F (–52°C).

†

60% ethylene-glycol base antifreeze and 40% water by volume gives maximum coolant protection (–62°F [–52°C]). Exceeding 60% antifreeze diminishes

coolant protection; concentrated ethylene-glycol base antifreeze will freeze at approximately 0°F (–18°C).

Table 5, Maximum Coolant Protection in Degrees F (Degrees C) at Various Antifreeze Concentrations

20–03 Fan Drive and Clutch

Checking (Noise
Emission Control)

Eaton Viscous Fan Clutch

Periodic maintenance is not required because an
Eaton viscous fan drive is a sealed unit. However,
periodically check it for damage and for correct op-
eration. If the fan drive is inoperative or damaged,
replace it with a new one. See Group 20 of the

Heavy-Duty Trucks Service Manual

for instructions.

Horton Advantage

and HT 55O

Fan Clutch

NOTE: If any part of the fan clutch needs to be
fixed or replaced, after performing the checks
below, see Group 20 of the

Heavy-Duty Trucks

Service Manual.

Inspect all electrical connections and wires.
Tighten the connections if loose, and replace
wires and connections if damaged.

Charge the air system to 120 psi (627 kPa), then
proceed as follows:

WARNING

Do not jumper the thermal switch while the engine
is running. This could start the cooling fan, which
could result in serious personal injury.

If the vehicle is equipped with Detroit Diesel Opti-
mized Idling

, make sure this feature is not acti-

vated. If Optimized Idling were activated, the en-

gine could start up without warning, resulting in
serious personal injury.

2.1

If equipped with an electric thermal
switch,

make sure the engine is not run-

ning. Put the ignition switch in the ON
position (engine shut down). Place a
jumper between the thermal switch con-
nectors (located in the engine thermostat
housing), while observing the fan clutch.
The fan clutch should be seen and heard
engaging.

If equipped with a fanstat (shutterstat),

run the engine until its temperature is
above the fanstat engagement setting of
195°F (91°C). The fan clutch should en-
gage, causing the fan to turn.

WARNING

Wear safety goggles when draining the air system
or loosening an air line, because dirt or sludge
could fly out at high speeds. Do not direct the air-
stream at anyone. Do not disconnect pressurized
hoses, since they may whip as air escapes. Fail-
ure to take all necessary precautions could result
in personal injury.

2.2

If the fan clutch does not engage, see if
compressed air is in the fan clutch actuat-
ing air line: With the ignition on, but the
engine shut down, slowly loosen the fit-
ting that connects the actuating air line to
the fan clutch; do not disconnect the fit-
ting. If compressed air escapes, the fan
clutch is inoperative and must be re-
paired. If no compressed air escapes,
replace the solenoid valve or fanstat, as
applicable. Tighten the fitting.

Engine Cooling/Radiator

Heavy-Duty Trucks Maintenance Manual, January 2007

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Check all air connections for air leaks.

Check for wear on the friction facing. See

Fig. 3

(Type S and HT/S) or

Fig. 4

(HT 550). Replace

the facing if it is worn to 1/16-inch (1.6-mm)
thickness or less on a Type S or HT/S fan clutch,
or to 7/32-inch (5.6-mm) on an HT 550 fan
clutch.

If equipped with a toggle switch on the dash, run
the engine with the engine temperature below
205°F (96°C) for Caterpillar engines, or below
200°F (93°C) for all other engines. Set the toggle
switch to the ON position; the fan clutch should
engage. Set the toggle switch to the AUTO or
OFF position; the air should exhaust and the fan
clutch should disengage. Replace the switch if
necessary.

With the engine off and the fan clutch engaged,
use a listening device to check for air leaks. If a
leak is heard, check for air leaks in the fan clutch
by lightly brushing a soap solution in the follow-
ing areas:

6.1

Type S and HT/S Fan Clutches

(

Fig. 3

)

Check for air leaks at the bleed hole on
the fan pilot. Air leakage means that the
cartridge assembly (

Fig. 5

, Ref. 16) or

face seal (Ref. 17) is damaged.

Check for air leaks between the air cham-
ber and the piston friction disc. Air leak-
age means that the large O-ring (Ref. 14)
is damaged.

Check for air leaks around the safeguard
hole on the piston friction disc. Air leak-
age means the small O-ring (Ref. 18) is
damaged.

Check for air leaking from the System
Sentry

fuse. Leaking air means the

clutch has gotten so hot the lead alloy in
the fuse melted. This released the clutch
before the heat could damage the clutch
bearings. Before replacing the fuse, find
and repair the source of the heat.

6.2

HT 550 Fan Clutch

(

Fig. 4

)

Check the rotary air union for air leaks.
Make sure the air line at the air union is
not restricted due to kinking or bending. If
air leakage is found, replace the rotary air
union (

Fig. 6

, Ref. 10).

Check for air leaks around the piston
(Ref. 15) and air chamber (Ref. 13). If air
leakage is found, replace the O-ring seal
(Ref. 11).

f200290

08/08/94

System Sentry

Fuse

Safeguard Hole

Friction Facing

Piston Friction Disc

Air Chamber

Fig. 3, Horton Type S and HT/S Fan Clutch

10/19/93

f500005a

O-Ring Seal

Friction Facing

Piston

Air Chamber

Rotary Air Union

Fig. 4, Horton HT 550 Fan Clutch

Engine Cooling/Radiator

Heavy-Duty Trucks Maintenance Manual, January 2007

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Kysor/Dynair

and Kysor K22RA

Fan Clutch

NOTE:

Check the lining wear at the first M3

maintenance interval; the lining wear does not
require checking at the first M2 interval. Subse-
quent checks must be made at each M2 mainte-
nance interval.

Disconnect the electrical cables from the battery.
Drain all air from the air system. If equipped with
an air starter, drain the air starter reservoir.

WARNING

If the engine starts during this procedure, the fan
could cause personal injury. If the vehicle is

equipped with an air starter, be sure that the air
starter reservoir is drained.

Measure the distance from the back surface of
the fan clutch retaining plate to the forwardmost
edge of the fan belt pulley. See

Fig. 7

, Ref.

Disconnect the line from the air inlet of the air
cylinder. Connect a shop air hose to the inlet.

Apply a minimum of 100 psi (690 kPa) air pres-
sure to the air cylinder—the bearing housing will
move backwards, disengaging the clutch. Again,
measure the distance from the back surface of
the retaining plate to the forwardmost edge of
the fan belt pulley.

Compare the two measurements; if the difference
exceeds the wear limit given in

Table 6

for the

Kysor/Dynair, or exceeds the wear limit of 0.15

f200194a

03/30/95

Mounting Bracket

Rear Sheave Bearing

Inner and Outer Bearing
Spacers

Forward Sheave Bearing

Sheave

Friction Facing

Journal Spacer

Socket-Head Capscrew

Rear Hub Bearing

10. Bearing Spacer
11. Splined Hub
12. Forward Hub Bearing
13. Piston Friction Disc
14. Large O-Ring
15. Locknut
16. Cartridge Assembly

17. Face Seal
18. Small O-Ring
19. Air Chamber
20. Socket-Head Capscrew
21. Stud Bolt
22. Lockwasher
23. Hexnut
24. Piston Assembly

Fig. 5, Horton Type S and HT/S Fan Clutch Components

Engine Cooling/Radiator

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