Mainshaft (four-speed synchromesh type)	dismantling and reassembly
	Place the mainshaft on a clean uncluttered working surface and begin dismantling by sliding off the third/fourth synchro-hub and baulk rings from the front of the shaft.
	Using a thin screwdriver or thin piece of rod, press down the spring-loaded plunger and turn the splined thrustwasher so that a spline holds the plunger down and the thrustwasher is so positioned that it can now be slid off the front of tlie mainshaft.
	Lift out the spring and plunger and -.hen slide off the third speed gear and its caged needle roller bearing from the front of the mainshaft.
	From the rear of the mainshaft withdraw the first speed gear and its caged needle roller bearing.
	Using two screwdrivers carefully lever the first speed gear needle roller bearing journal rearwards and off the mainshaft.
	Now slide the first/second synchro-hub and the two baulk rings off the rear of the shaft.
	The splined retaining thrustwasher securing the second speed gear in position is retained with two spring-loaded plungers. To compress the plungers insert two small screwdrivers between the thrust-washer and the edge of the gear. Now rotate the thrustwasher so that the splines hold the plungers down and the thrustwasher is so positioned that it can now be slid off the rear of the mainshaft.
	Insert two pieces of wire through the holes in the cone face of the second speed gear. Compress the two spring-loaded plungers and withdraw the gear from the rear of the mainshaft.
	Finally lift out the spring and plungers and take off the second speed gear and split caged needle roller bearing.
	Should it be necessary to dismantle the synchro-hubs place a rag around the hub to catch the balls and springs that will be ejected and then slide the inner hub out of the collar. Now recover the balls and springs from the rag.
	To reassemble the hubs, hold the balls against spring pressure with your fingers and with the help of an assistant slide the hub into the collar. Ensure that the spaces in the collar align with the cut-outs in the hub (photo). Also ensure that the long boss on the collar and hub are on the same side when assembled.
	Begin reassembly of the mainshaft by placing the two split halves of the second speed gear needle roller bearing in position and then insert the spring and plunger into the drilling on the mainshaft (photo).
	From the rear of the mainshaft slide on the second speed gear, flat face first, depress the plungers and slide the gear over the needle roller bearings.
	Support the mainshaft in a vice with suitably protected jaws and using two thin pieces of rod inserted through the holes in the cone of the gear, compress the two plungers (photo).
	Now slide the thrustwasher into position and rotate it until the plungers can be heard to click into position and lock the thrustwasher (photo).
	Place the baulk ring in position on the second speed gear and then refit the first/second synchro-hub with the long boss towards the rear of the mainshaft (photos).
	Fit the first speed gear needle roller bearing journal to the rear of the mainshaft (photo) and tap it fully home using a tube of suitable diameter.
	Refit the first gear needle roller be aring, the baulk ring and then first gear with the flat side towards the rear of the mainshaft (photos).
	From the front end of the mainshaft assemble the third gear needle roller bearing and then place the spring and plunger into the drilling in the shaft (photo).
	Slide on the third speed gear, flat side first, followed by the splined thrustwasher (photo). Ensure that the notch at the rear of the thrustwasher is adjacent to the plunger.
	Depress the plunger and rotate the thrustwasher until the plunger can be heard to click into place and lock the thrustwasher (photo).
	Refit the baulk ring to the third speed gear (photo) and then slide on the third/fourth synchro-hub ensuring that the large boss on the hub faces the front of the mainshaft (photo).
	Finally refit the remaining baulk ring to the front of the third/fourth synchro-hub (photo).