54
(ii)
Remove the screws securing the bearing housing and remove the
housing complete with the power take-off shah and reduction
gearwheel. Remove the shims
(iii)
Remove the reduction gear housing.
(iv)
Remove the nuts retaining the driving gearwheel.
(b) Reduction gear maintenance
(i) Examine the bearings and fit new parts if rollers or roller tracks
show signs of wear.
(ii) Examine the driving and driven gearwheels. Renew if the teeth
are scored or show signs of wear
(c) To replace
(i) Generally reverse the instructions for removal making sure the oil
seals are in good condition.
(ii) Check the power take-off shaft end float (see Technical Data) and
if not correct, alter the total thickness of the shims behind the
bearing housing.
85. Electric starting equipment (negative earth) (Fig. 23)
(a) This consists of a battery-operated starter motor engaging with a gear
ring on the flywheel, a dynamo for battery charging, a regulator and
switch. Operating the switch energises a solenoid which engages a
motor pinion with the gear ring The pinion remains engaged until the
switch is released, but a free-wheel prevents overspeeding the motor
when the engine fires.
Starter motor
(a) Mounting
Make sure the motor is securely mounted on the engine Fit the
mounting bracket to the engine before mounting the starter motor.
(b) Lubrication
Bearings are lubricated on assembly and require no attention between
overhaul periods.
(c) Terminals
Main terminals and all circuit connections must be clean and tight.
Terminal shrouds should be in position
(d) Brush gear
Remove the cover and inspect the brushes and commutator Brushes
should be free in their slides Springs should seat squarely on the
brushes See that the insulation is in good condition The brushes and
commutator should be free from dust and grease and contact surfaces
clean, smooth and uniform in colour
