Final check

• Fasten dial gauge (A) to push-rod (C), making sure that dial gauge is fitted with a preload of 10 - 15 mm, then zero.
• Turn pump in its slots and move top of pump away from cylinder assembly (maximum delay).
• Turn crankshaft in its direction of rotation until piston no. 1 is moved exactly to TDC.

Never turn crankshaft against direction of rotation, otherwise tool or pump could become damaged.

• Read gap off dial gauge, then turn pump slowly in slots until dial gauge shows exact installation gap shown on pump label (e.g. 8.52 mm).
  Now tighten pump retaining screws fully.

FINAL CHECK

• Turn the crankshaft in its direction of rotation through several revolutions (at least 2) until piston no. 1 is exactly at TDC: the dial gauge reading must correspond to gap printed on pump label.
  Otherwise, repeat procedure described previously with greater precision.

ADJUSTMENTS WITH PUMP FITTED TO VEHICLE

Before adjusting pump, engine must be at service temperature, i.e. radiator cooling fan must have come on at least twice.

Anti-stall speed adjustment

1. Interpose a spacer measuring exactly 2 mm between anti-stall adjustment screw (10) (see figure on previous page) and accelerator control lever.
2. Turn on engine and adjust speed to 1600±100 min, using a 3 mm socket wrench to turn anti-stall adjustment screw (10).
3. Remove 2 mm spacer.
4. Adjust idle speed to 810±20/min by means of idle adjustment screw (5) after loosening locknut. After adjustment, tighten idle adjustment screw locknut.
5. Move idle control and fuel cut-off lever (7) by hand (see figure on previous page) toward cut-off position by 0.5 - 1 mm. The engine should tend to stall or at least speed should drop. If this does not occur, repeat the previous adjustments described at points 1 - 2 - 3 - 4 to obtain a new engine speed that still lies between 800-1000/min: then repeat test until a positive result is obtained.