Nilfisk-Advance SW900, Service Manual

Page: 62 / 137

Electrical and Control System 62 Service Manual – SW900
Dynamotor Voltage Check (SW900 P) (Continues)
If the voltage is lower than the specified value,
perform the following procedures to detect the
cause and correct it:
• Check that the drive belt between the
engine and reduction unit is properly ten-
sioned (see the procedure in the relevant
paragraph) and that the pulleys are efficient
and not loose
• Check that the reduction unit is correctly
closed
• Check the dynamotor carbon brushes (see
the procedure in the relevant paragraph)
• If necessary, disassemble the dynamotor
(see the procedure in the relevant para-
graph), and check the condition of all its
components
If the above-mentioned procedures do not lead
to a correct voltage, the dynamotor must be
replaced (see the procedure in the relevant
paragraph)
Reassembly
10 Close the engine compartment hood and engage
the front fastener
11 Release the hopper position microswitch
from the forced operation, and check that the
microswitch operates properly
12 Install the hopper by using its transport handle
and wheels