Sachs SA 280A User Manual

ENGINE WITH BOSCH SOLENOID-CONTROLLED
STARTER (Type DO)
Fig. 61
Fig. 61
To remove starter, unscrew 2
nuts
(3) M B with spring washers
and t wo screws (1) M 8 x 20 with
washers.
The pini on of the solenoid-controlled star t er (Fig. 61) slides on a coarse thread on the
armature shaft and is first pressed up against the gear rim by means of a shift lever
until it engages with it. The lever is electro-magnetically operated. Shortly ofter
engagement of the pi nion, the switch mounted on the starter automatically closes
- on mechanically operated starters by means of the engaging lever _ the armature
revolves and the pinion screws itself further forward on the coarse thread until it is
ful ly engaged. Even if too th on toolh engagement occurs, fhe switch wi ll close, as
the spring is spring-connected to the guide ring and the lever is there fore not
hindered in its movement; when starting, the armature turns the pinion until it con
engage. As soon as the pinion runs up agains t i ts counterpart, fi rm contact is estab-
lished between it and the armature, and the engine is being started.
If, after starting, the engine begins to overtake the starter, the pinion is uncoupled
from the
armature shaft by on overrunning roller clutch, but remains engaged with
the gear rim until the engaging lever is returned to its initial position by a return
spring.
To enable the starter to come to rest as soon as possible afte r being switched off, and
to enable a new star! to be made shortly afterwards, on armature broke is installed
on the commutator bearing of the starter.
42
ENGINE WITH BOSCH INERTIA-PINION TYPE
STARTER
(Type DG)
Fill. 62
To remove starter, unscrew 2 nuts
(3) M 8 with spr ing washers.
Fig. 62
The pinion of the inertia-pinion type st arter (Fig. 62) slides on a coarse thread on the
arma t ure shaft. In rest position the gear is held bock by spring tension and the pinion
is not engaged. When the starter is operated, the acceleration of the starter and the
inertia of the pinion result in a force which causes the pinion to run along the shaft
and engage with the gear rim. When the pinion has reached the stop on the armature
shaft the drive becomes positive and the engine is turned by the sta rter.
If, after starting, the eng in e begins to overtake the starter, the pinion is uncoupled
from
the ormature shaft by an overrunning roller clutch and is spun bock by spring
pressure into rest pos ition.
Note:
On subsequen t installation of an inertia-pinion type st arter, on ly the magneto housing
wi th steel rim (F & S Port No. 1471 007000) can be used.
43

Sachs SA 280A Specifications

General

Brand	Sachs
Model	SA 280A
Category	Engine
Language	English