The Connecting rod should have no detectable vertical play with oil in the bearing.

To dismantle the Flywheel assembly a heavy Box-Spanner will be needed. The crankpin nuts are invariably tight, and good leverage is required to shift them. The nuts are not locked.

A ¾-in. Whit. spanner (1.3-in. across the flats) and not exceeding 1¾-in. diameter around the hexagon will be needed.

The ends of the Crankpin are slightly taper and the pin will have to be driven out of the Flywheels. For inspection it is of course only necessary to take off one Flywheel, which will permit the

Connecting rod and the roller cage to be slid off the Crankpin, making all parts accessible for close inspection.

The Roller cage is supported on the Crankpin and occasionally wears the outer edges. This is not important provided that the Roller track In the centre is in good condition. Any pitting of the Roller-track calls for renewal of the affected part, and the Crankpin will have to be taken out of the other Flywheel.

Actually, the Crankpin is made up of two parts (except before 1939 when the pins were made in one piece) - a hardened steel Sleeve being pressed on to a "soft" pin. Thus in the event of wear, the Sleeve only may be renewed.

The Standard diameter is 1.374-in.