Toro Workman 3000 Series Service Manual page 221

8. Before installing the camshafts and timing gears, turn
the crankshaft to set the No. 1 cylinder to top dead
center (TDC) of the compression stroke. Reverse steps
1 - 5 to install the camshafts and timing gears (Fig. 81).
9. With the crankshaft set to No. 1 cylinder TDC, install
the idle gear so the timing marks on all the gears are in
alignment (Fig. 82).
Workman 3300-D/4300-D Page 4 - 71
Figure 81
Figure 82
Liquid Cooled Diesel Engine