SWEEPING SYSTEM
ENGLISH
SERVICE MANUAL
18
146 1965 000(2)2007-02
Terra
TM
3700B
MAIN MOTOR ELECTRICAL INPUT CHECK
WARNING!
This procedure must be performed by qualified personnel only.
Preliminary operations
Check and adjust the main broom.
Drive the machine on a solid and level ground and engage the parking brake with the lever (23).
Turn the ignition key (2) to “0” and remove it.
Open the hood (26) and engage the hood support rod (60).
Connect the main motor (74) to the battery (61) as shown in the diagram (A), by inserting the 30 A fuse (B) to protect the
system.
Apply an ammeter (C) to the connection (A) and route the connection so that the hood (26) can be closed; then perform the
test shown in the next step. In this way, the ammeter (C) can be seen by the operator seated on the machine.
Check the main motor electrical input
Start the machine and perform a sweeping simulation, according to the procedures shown in the User Manual. The
following conditions are required:
Lower the main broom.
Lift the side brooms.
Drive the machine at the maximum speed.
Clean the vacuum filter by using the filter shaker.
Drive the machine on a stretch of level ground, in both directions, while recording both values.
Do not let the engine overheat.
In these conditions, record the main motor electrical input by using the ammeter (C).
Stop the machine and compare the readings with the values listed in the table below, according to the kind of ground the
test has been performed on.
Kind of ground
A
Smooth concrete base
20 - 22
Light carpet
20 - 22
Heavy carpet
26
If the electrical input is higher, perform the following procedures to detect the cause and correct the abnormal input:
Remove dirt or foreign materials from the main broom drive system, which can clog or slow down its normal movement.
If necessary, check the motor carbon brushes.
If necessary, remove, clean and check the main motor.
If the above-mentioned procedures do not lead to a correct electrical input, the motor must be replaced.
Reset
Perform steps 4 and 5 in the reverse order.
1.
2.
3.
4.
5.
6.
•
•
•
•
•
•
•
•
•
7.
C
B
30A
A
S300811
