Electrical system
Check the 13- diodes in the opposite direction of current
flow by switching the position of the positive and neg-
ative probes. Carry out the same measurement proced-
ure as above.
NOTE! Check first the inner resistance in the measuring
cables. When the measurement between the stator
windings is carried out the measuring cable�s inner re-
sistance (e.g. 0.10 Q) must be deducted from the value
obtained.
The instrument should during this measurement show a
one "1" (to far left). If the instrument shows another val-
ue the diode is defective.
Measure between all winding connections (three meas-
urements). The resistance should lie at 0.10 S2.
Note: If any diode is defective the entire diode plate
must be replaced.
Measure also against the alternator material by con-
necting the instrument in position S2. Measure between
the respective winding and the material. The instrument
should during this measurement show a one "1" (which
implies infinite).
Checking of the D+ diodes
If the instrument shows another value the stator winding
is defective.
The diode plate�s three magnetising diodes are check
according to the same principle as above.
Note: If any stator winding is defective the stator
must be replaced as a complete unit.
Connect the measuring instrument�s positive probe to
the respective connection for the stator winding (1-2-3)
and the instrument�s negative probe to D+. The voltage
drop for the respective diode should be between 450
and 650 mV.
Check the D+ diodes in the opposite direction of current
flow and switch the positions of the positive and nega-
tive probes. Carry out the same measuring procedure
as above. The instrument should show a one "1" (to far
left). If the instrument shown another value the diode is
defective.
Starter motor
General
The stator motor is a DC series motor. The starter gear
is controlled by a magnet and is moveable in an axial
direction on the rotor shaft.
Note: If any diode is defective the entire diode plate
must be replaced.
On engine MD2040 the starter motor is provided with a
reduction gear. This enables a higher torque.
Check measurement of the stator windings
When the diode bridge is removed it is possible to
measure the stator windings with the multimeter set to
the "Buzzer" position.
Measure the resistance between respective windings.
76
| Categories | Volvo Penta Manuals |
|---|---|
| Tags | Volvo Penta MD2010, Volvo Penta MD2020, Volvo Penta MD2030, Volvo Penta MD2040 |
| Download File |
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| Document File Type | |
| Copyright | Attribution Non-commercial |
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jeg skal bruge manualen , til at samle min Volvo penta md 2030 igen.
Ö, hur dka jag veta om det är bra innan jag set produkten.
Pages 58 and 59 are missing from Volvo Penta MD2010 MD2020 MD2030 MD2040 Workshop Manual. I need only these pages at present!