Volvo DL 1981 Owner Manual

pg. 57 Servicing, Page 71 of 127 pages for Volvo DL 1981 Owner Manual. The Owner Manual is applied into the following products: GL 1981, GT 1981

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1981 Volvo DL, GL and GLT It is unlawful to dispense leaded fuel into a vehicle labeled "unleaded gasoline only". Lambda-sond TM (oxygen sensor) system This is an emission control system designed to reduce emissions and improve fuel economy. An oxygen sensor monitors the composition of the exhaust gases leaving the engine. The exhaust gas analysis is fed into an electronic unit which continuously influences a frequency valve. This adjusts the air-fuel ratio to provide optimum conditions for combustion and efficient reduction of the three major pollutants (hydrocarbons, carbon monoxide and nitrous gases) through a 3-way catalytic converter. Change oxygen sensor unit. Reset service indication for oxygen sensor. The oxygen sensor must be replaced every 30,000 miles (50,000 km). To remind the driver about the change of the oxygen sensor unit there is a special reminder light (See section titled "Warning Lights".) The light will stay on until reset. Note: Failure to follow the recommended maintenance may result in vehicle not meeting Federal or state emissions standards. Fuel (line) filter The fuel filter is located on the firewall in the engine compartment. We recommend that this filter be changed every 45,000 miles (75,000 km). The filter is replaced as one complete unit. Replace more frequently if contaminated fuel was introduced into the tank. Air cleaner Replace the air cleaner cartridge with a new one every 30,000 miles (50,000 km). The cartridge should be replaced more often when driving under dirty and dusty conditions. The filter cannot be cleaned and, therefore, should always be replaced with a new one. pg. 57 Servicing Checking and adjusting idling speed The idling speed should be adjusted every 15,000 miles (25,000 km). California vehicles and those equipped with the Volvo Constant Idle Speed System do not require idle speed adjustment. Fuel system cap, tank and lines and connections The effectiveness of the fuel system to contain hydrocarbons is largely dependent on a leak-free system. Check for proper sealing of gasoline filler cap which contains "O" ring type seals. Check all evaporative hoses in vehicle for tightness. Check fuel lines under vehicle and repair if necessary. file:///K|/ownersdocs/1981/81_dl_gl_glt/81DLGLGLT_03a.htm (14 of 18)12/22/2006 10:28:38 PM

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