Belt 1685 mm 7242/50849 JCB, aftermarket

Belt 1685 mm 7242/50849 is an aftermarket part for the JCB machines. According to the product card, this part is a belt, size 1685 mm.

The drive belt carries power from the crankshaft pulley to the alternator, water pump, fan and air conditioning compressor. Machines mostly use multi-rib (poly-V, for example 8PK) or V-belts. Over time a belt stretches, hardens and cracks across its ribs; a loose or worn belt slips and squeals, the alternator stops charging, the engine overheats or the air conditioning stops working. A broken belt stops the water pump and fan and can overheat the engine quickly. The belt must be kept away from oil and fuel, as oil softens the rubber and causes slipping.

Specifications

Compatibility

According to the product card, the part number is 7242/50849. The card also lists 3289102, 3927103. Fit is confirmed by the part number and the machine serial number. Other parts are in JCB belts.

Fitting

Before fitting the belt, stop the engine, release the tensioner and note the belt's routing. Seat the new belt in the correct grooves of all the pulleys, then release the tensioner or set the tension to the maker's value. Check the belt again after running the engine briefly.