15—710 Checking preglow system   Conventional tools   Voltmeter (measuring range 0-3 volts/0—30 volts)   Note   Battery charged min. 60 % (acid density approx. 1.22 g/cc).   A. Engine 617.950 <®> up to 1980…

    15—708 Installing preglow time relay with modified ventilation   Note   Since Septemb3r 1981 a preglow time relay with modi­fied ventilation is installed for quick-start preglow sys­tem. The part number has not been changed. In…

    15—705 Operation of preglow system   A. General information   On a diesel engine, combustion is effected by self-ignition of the fuel sprayed into the highly compressed and thereby highly heated combustion air. In the…