Long 360 Series User Manual

TROUBLE-SHOOTING INSTRUCTIONS
The troubles which may be brought out during
the tests are the following:
1. Low idling speed, l'ligh current input with low
torque output.
This trouble may be due to shorted or grounded
armature coils or to defective mechanical com-
ponents (worn-out bearing bushings, bent ar·
mature shaft, loose pole shoe screws). The ar·
mature check is instantaneous, as in these cases
there is a defective commutation bar correspon·
ding to the shorted or grounded coils, so that the
commutator sinks in correspondence of the
aforementioned bars and brush wear is accen-
tuated.
If the trouble is found in the armature winding,
replace the complete armature.
In
the case of mechanical troubles, which are
also revealed by characteristic noises, replace
the worn-out bushings, or the bent armature
shaft, and re-tighten the pole shoes.
2. The starter is inoperative and has a high cur-
rent input.
The trouble is due to a grounded armature or
field winding.
3. Starter inoperative, no current input.
The trouble may be due to a broken-off solenoid
coil, oxidized or worn out contacts because of in-
terposed dirt particles, lack of contact between
brushes and commutator because of brush wear
or breakage of the springs, and to broken-off
field winding.
4. Low idle speed, low current input with low
torque.
The trouble may be due to excessive internal
resistance in the starter, due to defective con-
nection or to a dirty or thrown commutator.
5. High idling speed, high current input with
low torque.
The trouble may be due to a short across the
series field winding or to shunted field winding
interruption.
The former trouble is not easily detected by tak·
ing a resistance reading, due to the low value of
the resistance. Consequently, it is best to
replace it and to check functional conditions
with a new field winding.
SERVICE INSTRUCTIONS
Parts
replacement does not always require that
the starter be dismantled completely. The right
sequence of disassembly, up to the final stripp-
ing and reassembly operations, are given as a
practical service guide.
STARTER DISMANTLING
Strip the starter according to the indicated se-
quence.
The figures illustrating the top refer to the starter
type 2130.
FIG. 0.11/3 STATOR ASSEMBLY
9.
Brush sub·asy.; 13. Spring; 34. Brush connec·
tions sub-asy.
1. Remove nuts (22, Fig. 0.1115), assembling
rods (24) of the bearings, remove the cover
(26),
screw (19) and bearing assembly from
collector side (27) provided with bushing, spr-
ing (13), seat (12) and insulating washer (11)
for armature thrust.
2. Lift brushes slightly and place the spring
ends against the side face of each brush to
avoid damage, then disconnect the starter
cwinding lead from terminal (30, Fig. 0.11/1)
and withdraw from the armature the com-
plete housing with brush holder bearing.
3. Disconnect from the positive brush holders
the terminals of the induction coil winding.
Separate then the complete brush holder
bearing (9, Fig. 0.11/5) from the starter hous-
ing.
Electrical System • 200

Long 360 Series Specifications

General

Brand	Long
Model	360 Series
Category	Tractor
Language	English