SECTION K Timing K1 General crankshaft is uppermost as shown in Fig. K.1. (This will bring Nos. 1 and 4 pistons to T.D.C.) As timing gears are employed, the factory setting remains constant. It is also worth remembering that the removal of the cylinder head in no way effects either the fuel pump or the valve timing. 2. Fit the camshaft gear to its hub ensuring that the 'D' marks are correctly aligned. (Refer to Fig. J.5). Secure with the three setscrews. 3. Similarly, fit the fuel pump gear to the fuel pump drive hub ensuring that the stamped timing marks align as shown in Fig. J.6. Secure with the three setscrews.
TIMING MARKS When the engine is originally timed at the factory, certains marks are stamped on the gears, so that if for any reason the engine timing has to be disturbed, then to reset to the original timing is quite straight forward. 4. Replace the idler gear so that the double dots on thE; idler gear are matched to the single dot on the crankshaft gear and single line (or dot) on the camshaft gear, whilst the single dot on the idler gear matches with the double dots on the fuel pump gear. These timing marks when correctly positioned will appear as shown in Fig. K.1.
To Reset the Engine to the Original Timing Before commencing the retiming procedure it is assumed that (a) the camshaft, fuel pump and idler gears have all been removed, and (b) the camshaft is free to turn by hand. (If the cylinder head assembly is still in position, it is advisable to remove the atomisers and rocker shaft to facilitate the retiming operations). 5. Locate the idler gear with the hub and the two securing setscrews using a new tabwasher. 6. Backlash adjustment should be carried out as described under the heading 'To Refit the Idler Gear and Hub. (See Page J.1). 1. Turn the engine until the keyway in the front of the