Nilfisk-Advance SR 1100 P/B Service Manual page 91

e e e e ) ) ) ) Take a functional test of motor M M M M 1 1 1 1 0 0 0 0 by applying a 24 V voltage first on
black and green wires and then on black and blue wires as shown in Draw.
1. (Warning: use a protection fuse) Note: Motor M M M M 1 1 1 1 0 0 0 0 current draw is from
10 Amp to 14 Amp when the hopper is empty, during lifting or lowering;
M M M M 1 1 1 1 0 0 0 0 current draw is from 30 Amp to 35 Amp at full weight (max 150 Kg
load)
f f f f ) ) ) ) If M M M M 1 1 1 1 0 0 0 0 works, replace the electronic card S S S S K K K K 4 4 4 4
C C C C a a a a s s s s e e e e N N N N ° ° ° ° 2 2 2 2 : you can hear the hydraulic pump turning
T T T T r r r r o o o o u u u u b b b b l l l l e e e e s s s s h h h h o o o o o o o o t t t t i i i i n n n n g g g g
a a a a ) ) ) ) Check the oil level in the hydraulic pump tank
b b b b ) ) ) ) Check for incorrect connection of the two hydraulic hoses (see Draw. 2:
UP and DN connections of the hydraulic hoses)
c c c c ) ) ) ) Check the hydraulic system (hoses and lifting cylinder), the hydraulic oil
tank and the hydraulic pump to verify that there is no break or oil dripping
N N N N O O O O T T T T E E E E : the hydraulic pump is equipped with two safety valves which
open in case of too high pressure of the oil in the hydraulic
system; the intervention of the safety valves must take place
at 200 Bar at the end of the hopper lifting phase and at 80
Bar at the end of the hopper lowering phase
d d d d ) ) ) ) If the above specified inspections didn't remove the problem, replace the
complete hydraulic pump.
Drawing.1
W W W W A A A A R R R R N N N N I I I I N N N N G G G G
- during test the motor must be disconnected from the
electronic board
- during test the battery must be disconnected from the
machine
- use a protection fuse to prevent accident in the event
that the motor be failed in short circuit
25
Drawing.2