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Group 170 Preventive Maintenance

Cab Climate Control Unit

Recovery/Recharge Unit Area

Check A/C Hoses, Fittings, Switches, and

Wires

Note: For further information refer to literature in Func-

tion Group 2.

WARNING

Do not remove the cap to the coolant surge tank while

the engine and radiator are still hot. Scalding ﬂuid and

steam may be blown out under pressure if the cap is

taken off to soon.

Note: This check is also considered Noise Emissions

Control Maintenance, which is required maintenance for

any Volvo vehicle. For further information on Noise Emis-

sions refer to “Noise Emissions” page 6.

To perform a check of the A/C Hoses, Fittings, Switches,

and Wires complete the following:

1 Pump up to where the relief valve releases (heater

controls should be open) at 75 kPa (11 psi). Leave

under pressure for ﬁve to ten minutes. Check for

leaks, wear, cracking and distortion on hoses and

tubing.

2 Check hose ﬁttings for tightness and damage.

3 Check damaged wires and switches.

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Volvo VHD Wartungshandbuch Seite 75