Specifications

ManualsBrandsSimplicity ManualsSnow Blower1694851

Chapter 1 Engine, clutch and gearbox

1 2.2e Crankshaft pinion can be slid off splined crankshaft end

13.1

Disengage gearchange shaft and withdraw from

casing

14 Dismantling the engine/gearbox unit: removing the end-

float plunger and neutral switch

1 Although the above mentioned components will not

prevent crankcase separation, it is advisable to remove them as

this will need to be done prior to reassembly. The plunger

assembly is retained by a single fixing bolt, and can be

with*

drawn from the crankcase after this has been released.

2 The neutral indicator switch is normally retained by a rubber

pad on the inside of the outer casing. After this has been

removed, the switch body can be withdrawn from the

crankcase.

15 Dismantling the engine/gearbox unit: separating the

crankcase halves

1 Slacken and remove the crankcase retaining screws from

each side of the unit. Note that the bolt which retains the clutch

cable guide must be removed if this has not been done already.

It is recommended that an impact driver is used to loosen and

tighten these screws as it is likely that the heads will be

damaged if an ordinary screwdriver is employed. The screws

will probably prove to be very tight, as they are machine-

assembled in the factory. It is worth noting that it is possible to

obtain sets of Allen screws to replace all the crossheaded

screws on the engine. These are usually far more durable and

better looking then the original fitments and do not require the

use of an impact driver.

2 Check that all the casing screws are removed, then lay the

unit on its side, right-hand casing half uppermost, and support it

on suitable wooden blocks. The right-hand casing half will

probably lift away quite easily, but should it prove stubborn it

can be tapped off using a soft headed mallet. Make sure that all

the components remain in the left-hand casing half. Place the

right-hand casing half to one side while the crankcase com-

ponents are removed.

1 6 Dismantling the engine/gearbox unit: removing the kick-

start mechanism, crankshaft assembly and gearbox com-

ponents

1 With the left-hand casing half still in position on the blocks,

the kickstart mechanism may be lifted out of the casing, having

first lifted the ratchet to release spring tension.

The crankshaft assembly can be lifted out of position. The

use of steel inserts in each crankcase half means that the main

bearings are a light sliding fit, and offer little resistance during

removal. They will remain in position on the crankshaft.

2 Lift the selector fork shaft slightly, so that the selector drum

can be pulled out of the casing. The selector fork assembly can

be eased out of position, noting that it may be necessary to lift

the gear cluster and then tip the fork assembly away from it. Do

not withdraw the selector fork shaft from the forks, as the lower

fork contains a spring loaded locating ball which is easily lost.

3 The gear clusters together with the shafts can now be lifted

out of the case, noting the shim(s) fitted to the shaft end. If the

gearbox assembly is not to be dismantled, it is advisable to

assemble the gear clusters, selector forks and the selector drum

in their correct relative positions, and to secure the assembled

unit with elastic bands before placing it to one side to await

reassembly.

Examination and renovation: general

1 Before examining the component parts of the dismantled

engine/gear unit for wear, it is essential that they should be

cleaned thoroughly. Use a paraffin/petrol mix to remove all

traces of oil and sludge which may have accumulated within the

engine.

2 Examine the crankcase castings for cracks or other signs of

damage. If a crack is discovered, it will require professional

attention, or in an extreme case, renewal of the casting. The

machine dismantled for the photographic sequences proved to

have sustained damage to one of the crankcase lugs due to the

kickstart mechanism breaking away part of its stop. (See

photograph). This necessitated the renewal of the damaged

casing.

3 Examine carefully each part to determine the extent of

wear. If in doubt, check with the tolerance figures whenever

they are quoted in the text or specifications. The following sec-

tions will indicate what type of wear can be expected and in

many cases, the acceptable limits.

4 Use clean, lint-free rags for cleaning and drying the various

components, otherwise there is a risk of small particles obs-

tructing the internal oilways.