Gear Housing - Intermediate Shaft - Husqvarna DM220 Workshop Manual

GEAR HOUSING – INTERMEDIATE SHAFT
C
1
2
B
A
510 22 11-01
Function
The gear housing contains a transmission that reduces the high speed of the
electric motor to a lower speed on the spindle shaft. The transmission is built
on two shafts, the intermediate shaft (A) and spindle shaft (B).
The electric motor powers the top gear wheel on the intermediate shaft.
This gear wheel has a slip clutch to the intermediate shaft to protect the
operator in the event of jamming.
The transmission has three gear selection positions that are controlled by
the knob (C). Change gear when the motor is idle.
Service work
The work procedure dictates that the complete intermediate shaft must always
be dismantled first.
However, the spindle shaft with attendant components, is dismantled into
individual parts from the gear housing. Following dismantling of the compo-
nents, the actual spindle shaft can be removed from the gear housing.
Dismantling –
intermediate shaft
1. Position the puller under the
two upper gear wheels.
2. Prepare for dismantling as per
the illustration. Press the shaft
up using the puller.
The helical drive has a slip
clutch on the intermediate shaft.
Slip clutch
Remove the nut.
5
Dismantling – intermediate
shaft
To dismantle you need a small standard
puller with long shanks, two spacers
(wooden blocks, at least 15 mm/.6 in.
high) and a bridge between them, e.g. a
rough metal object.
1. Position the puller under the two
upper gear wheels.
2. Prepare for dismantling as per the
illustration. Press the shaft up using the
puller.
The motor shaft drives the helical drive.
There is a slip clutch between the drive
and the intermediate shaft.
Slip clutch
Use special tool 510 22 11-01 to lock the
shaft.
Remove the nut.
9