GEAR-DRIVE 8E7475 - Caterpillar

Remove Timing Gears
start by:a) remove timing cover 1. Turn the crankshaft until No. 1 piston is at top center compression position and the "C" mark on the crankshaft gear is in alignment with the "C" mark on the camshaft gear. 2. Remove bolt (2) and washer from magneto drive gear (1).
Hold puller with hand to prevent injury when gear (1) is removed from the shaft.
3. Install tooling (A) on gear (1). Remove gear (1) from the magneto drive shaft. 4. Remove bolts (3) and the plate. Remove idler gear (2). Remove bolts (4) from the camshaft gear. 5. Remove the bearing from the idler gear (2) with tooling (B). 6. Install tooling (C) on camshaft gear (5). Remove camshaft gear (5) with tooling (C).Install Timing Gears
1. Install camshaft drive gear (1). Make sure the "C" mark on the crankshaft gear is in alignment with the "C" mark on the camshaft drive gear. Install the four bolts that hold the camshaft drive gear. 2. Use tool (A) to install the bearing in idler gear (2). 3. Put idler gear (2) in position on shaft (3). Put machined side of the plate toward the gear and fasten with two bolts. 4. Put magneto drive gear (4) in position over magneto drive shaft (5). Install washer with the chamfered edge away from the gear and fasten with the bolt. Tighten the bolt to a torque of 110 5 lb.ft. (149 7 N m).end by:a) install timing cover