GUIDE 4N3669 - Caterpillar

Illustration 1 g03791821
Typical example
(1) Feeler gauge (2) Timing mark on the crankshaft gear (3) Timing mark on the camshaft gear (4) Timing mark on the idler gear Minimum backlash for all gears ... 0.08 mm (0.003 inch)Maximum backlash for all gears ... 0.25 mm (0.010 inch)Note: If the backlash is greater than the maximum backlash, replace the camshaft gear, the idler gear, and the crankshaft gear.When the idler gear is installed on the shaft of the oil pump, align a timing mark on idler gear (4) with the timing mark on crankshaft gear (2). Also, align the other timing mark on idler gear (4) with the timing mark on camshaft gear (3).