Section 05: COOLING SYSTEM
Section 05 Updated Sept.2016
X3-45 Commuter PA1593 DOB 2400-2489
5
When installing a new hose, clean pipe
connections and apply a thin layer of a
non-hardening sealing compound. Replace worn
out clamps or clamps that pinch hoses.
3.1 CONSTANT-TORQUE HOSE CLAMPS ON
COOLANT LINES –VOLVO D13
All hose clamps of 1 3/8" ID and over, used on
the heating and cooling systems, are of the
"Constant-torque"
type. These clamps are
worm-driven, made of stainless steel, and
supplied with a series of Belleville spring
washers. They also feature an extended integral
liner that covers the band slots to protect
soft/silicone hoses from damage, and help
maintain consistent sealing pressure.
This type of clamp is designed to automatically
adjust its diameter to compensate for the normal
expansion/contraction of a hose and metal
connection that occurs during vehicle operation
and shutdown. The constant-torque clamp
virtually eliminates coolant losses due to
"Cold
flow"
leakage and greatly minimizes clamp
maintenance.
FIGURE 3: COOLANT FLOW TO RADIATOR (VOLVO D13)
3.1.1 Installation
A torque wrench should be used for proper
installation. The recommended torque is 90 to
100 lbf-in. (10 to 11 Nm). The Belleville spring
washer stacks should be nearly collapsed flat
and the screw tip should extend ¼" (6 mm)
beyond the housing (Fig. 4).
CAUTION
The hose clamps will break if over-torqued.
Do not over-tighten, especially during cold
weather when hose has contracted.
FIGURE 4: CONSTANT-TORQUE CLAMP
05037
3.1.2 Maintenance
The constant-torque clamps contain a
"Visual
torque check
“
feature.
When the tip of the screw
is extending ¼" (6 mm) out of the housing, the
clamp is properly installed and maintains a
leak-proof connection. Since the constant-torque
clamp automatically adjusts to keep a consistent
sealing pressure, there is no need to re-torque
hose clamps on a regular basis. During vehicle
operation and shutdown, the screw tip will adjust
according to the temperature and pressure
changes.
Checking for proper torque should be done
at room temperature.
3.2 CONSTANT-TORQUE HOSE CLAMPS ON
CHARGE AIR COOLER (CAC)
If for any reason such as an accident, hose
clamps need to be changed; install and tighten
hose clamps to 10±1 lbf-ft (dry) (Fig. 5).
CAUTION
The hose clamps will break if over-tighten. Do
not over-tighten, especially during cold
weather when hose has contracted.
Summary of Contents for X3-45 2016
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Page 16: ...Section 00 GENERAL INFORMATION PA1593 12 FIGURE 12 METRIC US STANDARD CONVERSION TABLE 00005...
Page 17: ...Section 00 GENERAL INFORMATION 13 PA1593 FIGURE 13 CONVERSION CHART 00006...
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Page 72: ...Section 04 EXHAUST AND AFTERTREATMENT SYSTEM PA1593 14 7 TORQUE SPECIFICATIONS...
Page 73: ...SECTION 04 EXHAUST AND AFTERTREATMENT SYSTEM PA1593 15...
Page 74: ...Section 04 EXHAUST AND AFTERTREATMENT SYSTEM PA1593 16...
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Page 176: ...SECTION 06B ELECTRICAL 38 overcurrent working Circuit 306 shorted to ground...
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Page 205: ...Section 09 PROPELLER SHAFT PA1593 3 FIGURE 1 PROPELLER SHAFT ASSEMBLY 09002...
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Page 295: ...SECTION 16 SUSPENSION PA1593 9 2 5 TORQUE SPECIFICATIONS...
Page 296: ...Section 16 SUSPENSION PA1593 10...
Page 297: ...Section 16 SUSPENSION PA1593 11...
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Page 413: ...Section 22 HEATING AND AIR CONDITIONING PA1593 15 FIGURE 18 REFRIGERANT CIRCUIT CENTRAL SYSTEM...
Page 433: ...Section 22 HEATING AND AIR CONDITIONING PA1593 35 FIGURE 36 CENTRAL HEATING SYSTEM COMPONENTS...