D4500

MOTOR COACH INDUSTRIES Pdf Download PDF Report

Unscheduled Maintenance

Date Test Miles Service Activity Downtime Hours
02-11-08 7195 The support plate for the A/C compressor is cracked. Replaced support plate. 2.0 2.0
02-11-08 7195 The left front A/C blower motor is failing. Replaced blower motor. 2.0 2.0
03-06-08 8226 The air conditioning will not function. Replaced failed control module. 10.0 0.5
05-16-08 13084 The A/C is inoperative. Control pad will not power up. Replaced failed micromax logic board. 2.0 2.0
02-27-08 7627 The 24 volt charging system is overcharging (36 volts). Replaced both batteries and notified manufacturer. 4.0 2.0
02-29-08 7627 Troubleshooted the charging system with manufacturer's rep. Installed a resistor on the 24 volt system in the electrical management box. 230.0 8.0
05-14-08 13084 The right side battery mounting bracket is broken and the left side bracket is cracked. Welded/repaired battery pack mounting brackets. 2.0 1.0
03-11-08 8327 Running diagnostics on transmission; codes 7438, 7421, 7452, 1323, 1324, 7356, 7451 and 7490. Arrangements being made to tow bus to Penn Diesel warranty dealer. 4.0 2.0
03-13-08 8327 Test bus towed to Penn Diesel-Allison warranty dealer for transmission problems. Warranty dealer replaced speed switch for the encoder. 224.0 8.0
03-27-08 8596 Inspect for coolant leak. Replaced broken 45 degree swivel fitting by the thermostat housing. Topped off coolant. 32.0 4.0
05-19-08 13084 Check system light is on, loss of throttle. Problem not found during troubleshooting. Test bus towed to Penn Diesel in Pittsburgh. Warranty dealer found the rotor B thrust bearing groove depth to not be within spec. Metal debris created by the failed bearing caused either a short-to-phase or short-to-chassis condition when it penetrates the coating on the stator windings. The warranty dealer was directed to overhaul the test bus with a new stator housing, rotor assembly and flange, filters, gaskets, bearings and a C1 clutch hub. 256.0 16.0
06-04-08 13690 The generator drive belt failed. Replaced generator drive belt. 1.0 1.0
02-13-08 7415 The lower drive axle radius rod bushings are worn. Replaced both left and right lower drive axle radius rods. 4.0 2.0
03-10-08 8262 The front sway bar is broken near the right radius. Replaced front sway bar and saddle bushings. 24.0 2.0
04-10-08 9007 The left outer sway bar bracket is broken on the front sway bar. Replaced bracket. 10.0 2.0
04-15-08 9423 The right rear drive axle shock is broken at the lower end. Replaced shock. 8.0 4.0
04-16-08 9590 The left forward shock on the drive axle is broken at the lower end. Replaced shock. 8.0 2.0
04-17-08 9837 The front sway bar is broken approximately 12 inches from the left side radius. Replaced front sway bar. 3.0 2.0
04-21-08 10086 The left front outer sway bar bushing is worn. Replaced left front outer sway bar bushing. 2.0 1.0
04-25-08 10993 The right front sway bar link is broken. Replaced right front sway bar link. 3.0 1.0
04-28-08 11131 The right side tag axle shock pulled apart. Replaced right side tag axle shock. 6.0 3.0
04-29-08 11361 Front sway bar-the lower bolt and nut is missing from the right outer sway bar clamp. Replaced bolt and nut. 1.0 0.5
05-06-08 12519 The front sway bar is broken. Replaced front sway bar. 4.0 3.0
06-10-08 14655 The right side forward shock is broken at the bayonet mount on the drive axle. Replaced right rear, forward shock. 3.0 2.0
12-17-07 2390 The cords are showing on the left rear tag axle tire. Replaced right front with new tire and rotated right front to left rear tag. 8.0 1.0
01-04-08 3842 The right rear tag axle tire is worn. Installed new tire on right front and right front rotated to right rear tag. 2.0 2.0
01-09-08 4522 The left tag axle tire is flat. Installed new tire at left front. Left front tire rotated to left tag. 3.0 3.0
01-23-08 6172 The right rear tag axle tire is worn. Mounted new tire and installed on the right front. Rotated right front tire to right tag. 2.0 2.0
01-30-08 6641 The left tag axle tire is worn. Removed worn tire and mounted new tire. Replaced worn left tag axle tire. 8.0 2.0
03-25-08 8534 The left tag tire is flat. Replaced left tag tire. 10.0 4.0
04-17-08 9837 The right tag axle tire is worn. Replaced tire with used repaired plugged tire. 4.0 2.0
04-18-08 9871 The left outside drive axle tire is flat. Installed new tire at left inside and rotated left inside to left outside. 18.0 4.0
04-24-08 10802 The left front tire is worn. Replaced left front tire. 4.0 2.0
04-29-08 11361 The right side tag tire is worn. Replaced right side tag tire with used plugged tire. 4.0 2.0
05-07-08 12742 The right side tag axle tire is worn. Replaced right side tag axle tire. 2.0 2.0
05-08-08 12953 The left side tag axle tire is worn. Replaced left side tag axle tire. 2.0 1.0
05-14-08 13084 The left sway bar link on the front sway bar is cracked. Replaced left front sway bar link. 2.0 1.0