Volvo VHD, Service Manual

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Group 170 Preventive Maintenance
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Check Radiator, Hoses and Pipes
Note: For further information refer to literature in Func-
tion Group 2.
WARNING
Do not remove the cap from the coolant surge tank
while the engine and radiator are still hot. Scalding
fluid and steam may be blown out by pressure if the
cap is removed while the engine and radiator are hot.
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.
Perform the Check of the Radiator, Hoses and Pipes as
follows:
1 Check the front area of the radiator package for dirt
and debris that hinders the air flow.
2 Clean the radiator package with compressed air or
water pressure, blowing or pushing from the inside
out.
Note: Air pressure should not exceed 2 bar (30 psi)
for the radiator and charge air cooler cores.
Note: If there is damage to the cooling fins,
straighten them out so air can flow freely.
3 Check for fluid leaks on or around the engine.
Note: Inspect the mating surfaces, auxiliary compo-
nent attaching areas and hookup, hoses and pipes.
4 Pump up pressure in the relief valve, with the heater
controls open, to .75 bar (11 psi). Leave under pres-
sure for five to ten minutes. Look for leaks, wear,
cracking and distortion on hoses and tubing.
5 Check the hose clamps for tightness.
40
Check Engine and Engine Driven Power
Take-Off for Leaks
Note: For further information refer to literature in Func-
tion Group 2.
To complete a check of the engine and engine driven
Power Take-Off complete the following:
1 Check that the engine does not leak oil or coolant.
2 Check that the fittings, flanges and hose connec-
tions are tight.
3 Check that hoses or pipes are not chaffed or are
cracked.
4 Check that the PTO or lines do not leak oil.
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