105639-2200 ZEXEL 9 420 615 285 BOSCH AUTOM. ADVANCE MECHANISM 9420615285 1056392200 3256507031

start by: a) remove fuel pump drive gear and automatic timing advance Before any timing gears are removed, make sure the "C" mark on the crankshaft is in alignment with the "C" mark on the camshaft gear. Put a mark on the idler gear and on the crankshaft gear at location (B).1. Remove two bolts (1) and plate (3). Remove idler gear (2). 2. Remove the idler gear bearing with tooling (A). 3. Remove four bolts (4) and washers. Remove camshaft drive gear (5). If the camshaft drive gear is hard to remove, hit it with a soft hammer.4. Remove the three nuts and washers that hold the fuel injection housing to the timing gear plate. 5. Remove six bolts (6) and the two locks (7) and (8). 6. Remove the timing gear plate.Install Timing Gears And Plate
1. Install the timing gear plate and gasket. Install the two locks and six bolts.2. Install the three nuts and washers that hold the fuel injection pump housing to the timing gear plate. 3. Install the camshaft drive gear. Make sure the "C" mark on the crankshaft gear is in alignment with the "C" mark on the camshaft drive gear. Install the four washers and bolts.4. Use tool (A) to install the bearing in the idler gear. 5. Install idler gear (2). Make sure the mark on the idler gear and the mark on the camshaft gear are in alignment at location (B). Install plate (3) and bolts (1).end by: a) install fuel pump drive gear and automatic timing advance