PREVOST X3-45 COMMUTER User Manual

MI18-37
Page 11 / 14
Writer: <QF7720955 rev 7>
EL
TROUBLESHOOTING, POSSIBLE DEFECTS, ELIMINATION
PROBLEM CAUSE SOLUTION
Clutch does not close any more,
no current stream
Intermittent contact in the plug Check plug
Contact corroded Clean contact
Connection cable defect Repair cable, replace coil
Clutch does not close in spite of
current stream
Insufficient voltage supply Check supply voltage
Impurities in the working gap
(foreign matters)
Disassemble clutch, remove
foreign matters and assemble it
again
Clutch slips when switched on
(causes the destruction of the
clutch by premature wear),
Insufficient voltage supply Check power supply
Friction surface polluted by small
quantities of greasy/oily
substances
Disassemble clutch, clean friction
surfaces with alcohol and
assemble it again.
Heat penetration in the clutch by
slipping V-belts thus grease
penetration in the bearing or
overheating of the clutch
Disassemble clutch. Clean
friction surfaces or replace
already damaged components.
After reassembly of the clutch,
tension V-belts correctly
Incorrect distance between coil
and rotor (coil not in line with the
rotor), thus the switchable torque
is reduced
Disassemble clutch, check cone
for cleanness. Check the seat of
the feather key, check the seat of
the coil.
Clutch worn, working gap too big
(app. 1,2 mm), friction partner
blue
Replace clutch or component
Clutch does not open
immediately when switched off,
this will cause a premature wear
of the clutch), shrieking noise
Voltage supply not completely
interrupted
Check circuit element for
switching the coil ON/OFF and
replace it if necessary
Clutch does not open any more,
voltage supply is in order
Clutch worn and friction partners
welded to each other
on the
friction surface
Replace clutch
Permanent grinding noise Coil not correctly centered or not
firmly screwed down
Check coil, screw it down, or
replace it if damaged. Check
clutch for consequential
damages, eventually
disassemble clutch, check
bearing and friction surfaces,
replace eventually damaged
components.
Compressor bearings defect,
causes friction between coil and
rotor.
Replace bearings. Check coil
function. Replace it if damaged.
If clutch slips,
replace whole
clutch due to friction damage.

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in