Perkins 1300 EDi Series, Руководство по ремонту, Страница: 212 / 264

14
200 Workshop Manual, TPD 1353E, Issue 3
Peregrine EDi and 1300 Series EDi
To maintain Operation 14-4
1 Inspect the brushes at intervals to ensure that they are free in their guides and that the wire connections are
free to move. To check this, lift the spring from the brush and pull carefully on the flexible connections. If the
brush does not move freely, remove it from its holder and clean the sides with a material which is damp with
gasolene.
2 Ensure that the brushes are fitted in their original positions to keep the original wear seat. The brushes must
have good seats which conform to the shape of the commutator. If the brush seat is not correct, put a piece of
very fine carborundum paper or similar material tight around the commutator with the rough face to the outside.
3 With the brush in position, turn the armature by hand, in the normal direction of rotation, until the brush has
the correct shape. If the brushes are so worn that the springs do not give enough pressure, they must be
renewed.
4 Check the spring pressure with the hook of a spring balance under the spring lip. The correct tension is
8,34/11,00 N (30/40 ozf) 0,85/1,13 kgf.
5 The new brushes must be the same grade as the original brushes. To ensure that correct brushes are fitted,
use only parts from the approved manufacturer.
6 To remove the brushes, remove the four setscrews that hold the brushes, one for each brush.
7 When the new brushes are assembled, connect carefully the field coil and connector wires, held by two of
the setscrews. Before the brushes are inserted in their holders, it is recommended that the holders are cleaned
with compressed air or with a material that is damp with gasolene.
8 The commutator must be completely clean; dirt or oil must be removed by a piece of clean dry material (with
no loose fibres) pressed against it, while the armature is rotated by hand.
9 If the commutator is dirty and has a colour other than its natural colour, lift the brushes and put a strip of fine
carborundum paper or similar material around the commutator, with the rough surface to the inside. Turn the
armature by hand until the surface has returned to its natural colour. Clean the commutator with a material
which is damp with gasolene.
10 If a repair is necessary to the commutator or switch gear etc, the starter motor must be removed for
specialist repair.
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