REPLACE COOLANT PUMP IDLER PULLEY AND ADJUSTING BRACKET (M548A3) --
Loosen cap screw (5) on adjusting bracket (1).
Belts should be neither too loose nor too tight. Belts which are too tight impose excess loads on
bearings, shortening life of bearing and belt. Loose belts may slip, causing overheating. Be sure
idler pulley pivot and adjusting bolts are torqued to 30-35 lb-ft (40.7-47.5 Nm).
Loosen adjusting cap screw (5) on bracket slot. Adjust the belt tension so that a firm push with the thumb, at a midway
point between the two pulleys, will depress the belt 1/2-3/4 inch (1.3-1.9 cm). If belt tension gauge J23600-B or
equivalent is available, adjust the belt tension to 40-50 lb (18.2-22.7 kg) on the gauge. New drive belts stretch during the
first few hours of operation. Run the engine 15 seconds to seat the belts, then readjust the tension. Check the belts and
tighten them again in approximately 1/2 hour of operation and again after 8 additional hours of operation. Check the belt
tension every 200 hours and adjust as necessary.
Tighten cap screw (4) and cap screw (5) to 30-35 lb-ft (40.7-47.5 Nm).
Install power plant rear access panel (see your -10)
END OF TASK