Sachs SA 280A - Page 46

Operation, maintenance and lubrication of electric starters
Operating instructions
Do not l eave the starte r sw itch ed on lon ger than 10 seconds without int err up ti on .
Before sw i tching on agai n, wait 1 minute to allow the starter to coo l and the battery
to r ecove r. If there is a grating of teeth, switch off s tart er immediately and repeat
starting attempt. Let go the starter as soon as the engine runs under i ts own power.
Should the system not be provided with a starter safety de vice, never switch on the
starter until the engine or the pi nion ha ve come to rest, as otherwise damage will be
caused to pinion and g ear rim.
If the engine does no t star t after some starting attempts, furthe r st ar t ing attempts will
serve no purpose and will on ly lead to exhaustion of th e batte ry. The fault should be
soug ht a nd reme di ed (ch eck the fue l supply in particular).
Maintenance
Danger of short circuits ar i ses when work is carr i ed out on the elec tr i cal componen ts
of the built - in starter. It is therefore strongly recommended, before carrying out such
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wo rk, that the earth lead be disconn ected from the battery. Do not place tools on the
battery!
Carbon brushes
The condition of the carbon brushes should be checked period ically. After removing
the ret aining strap (2, Fig. 61) of th e s liding gear starter or screwing off the cap (1,
Fig.
62) a nd tak ing out the fuse, the compensating washers and the cap (2 , Fig . 62) of
the inertia pinion type star ter, th e spri ng whi ch pr esses the releva nt carbon brush on
to the commutator should be raised, pre fe rably with a ho ok (take care not to bend
spring to one side and not to raise it long er than necessary ). Now check that the car-
bo n brushes can easily be moved in their guides in the brush holder.
The carbon brushes and brush hold ers must be kept free of dust, oil and grease. If
these parts are dirt y or j am, they should be cleaned w ith a cle an gasoline-damped
rag (not wi th waste w ool, as this easily sh eds fibres) and we ll dried .
Do not sa ndpap er, fi le or u se kniv es on the bright gro und surface of the carbon
brush es. Blow o ut the bru sh ho ld e rs we ll. If a carbo n brush is bro ken, unsoldered or
so worn that the spring or the sol dered-in strand in the brush is in danger of str ikin g
agai nst the br u sh hold er, then it should be repl aced. (U se o nly BOSCH carbon
brushes.) When fitting the carbon brushes, care shou ld be ta ken that the spring does
not s tr ike against the brush.
When fitting the cov er strap (2, Fig. 61) of the sl iding pinion starter, care should be
taken to ensure that the locking cl asp li es on the middle of a web; the sea lin g strip
glued into the strap sho uld close ly fit every wh er e.
Wh en fitting the cap (2, Fig. 62) of the in ert ia pi ni on typ e s ta rt er, car e sho uld be taken
to ensure th at the armat ure sh aft is se at ed cor rec tly in th e housing and that th e carbon
brush es ar e in close contact with the co mmutator . Fit co mp ensating washers and fuse
and screw o n
cap (1, Fig. 62).
The
carbon bru sh es s hould at all eve nt s be renew ed when the eng in e is g i ve n a gene -
ra l overhau l.
Commutator
The commutator should have an even, grey- black surface, and must be free of dust,
oi l and greas e. Soiled commu tators sh ould be cleaned with a clea n gaso lin e-damped
r ag (not w ith waste woo l) and we ll d ried. Commutators which have be co me scored
and ecce ntri c must be r e- turn ed in a s uita bl y eq uipp ed workshop . By no m ea ns s hould
a commutat or be worked on w ith sa n dpap er or a fi le.
L ubricatio n
Both bea rings of the sta rt er are provid ed wit h a se lf-lu bricati ng bearing (Campo-
bu sh). These bearings must not be grea sed or tr eated with gr ease-disso lvin g cleaners.
To increase the
ir se rvice lif e, the pinion and the gear rim should be cl ea ned p er iod i-
ca lly wi th a bru sh dipped in gasoline and then r e-gre osed (gra ph i te grease , e. g.
BOSCH Ft 1 v 13). If necessary, remov e bur rs from gea r rim and p ini on.
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