Carrier DM-4 Power Pack Operation And Service Manual Download | Manualshive

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DM-4
Power Pack

T-270

Bus Air
Conditioning
Unit

1
2
3
...
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Summary of Contents for DM-4 Power Pack

Page 1: ...DM 4 Power Pack T 270 Bus Air Conditioning Unit...

Page 2: ...Carrier Transicold Division Carrier Corporation P O Box 4805 Syracuse N Y 13221 SERVICE MANUAL OPERATION AND BUS AIR CONDITIONING UNIT DM 4 POWER PACK Carrier Corporation 1995 D Printed in U S A 0695...

Page 3: ...HOOTING 3 1 3 1 Diesel Engine 3 1 3 1 1 Engine Will Not Start 3 1 3 1 2 Engine Starts Then Stops 3 1 3 1 3 Starter Motor Malfunction 3 1 3 1 4 Malfunction in the Engine Starting Circuit 3 2 3 2 Altern...

Page 4: ...r Head Unloaded 1 4 1 6 Compressor Cylinder Head Loaded 1 4 1 7 Alternator Schematic Diagram 1 5 4 1 Speed Control Solenoid 4 2 4 2 Engine Speed Adjustment 4 3 4 3 Engine Crankcase Breather 4 3 4 4 Me...

Page 5: ...e compressor directly through a nylon drive gear and adapter The adapter also includes a V belt sheave which drives the system alternator Electrical power for the control system and for starting the e...

Page 6: ...Radiator Overflow Reservoir Figure 1 1 Power Pack DM 4 Front View 1 Water Temperature Switch Gauge WT 2 High Temperature Coolant Lockout HTL 3 Preheat Light PHL 4 A C Stop Light ASL 5 Rear Start Switc...

Page 7: ...7 8 10 9 4 Figure 1 4 Fuel System Diagram 1 Fuel Tank 2 Fuel Supply Line 3 Fuel Pump 4 Mechanical Lift Pump 5 Fuel Filter 6 Fuel Bleed Valve 7 Injection Pump 8 Injector Nozzles 9 Fuel Leak off Line 10...

Page 8: ...n Valve 14 Discharge Piston Check Valve Assembly 15 Discharge Manifold Figure 1 5 Compressor Cylinder Head Unloaded b Loaded Operation Refer to Figure 1 6 Discharge pressure bleeds from the discharge...

Page 9: ...oning alternator driven by the main engine Both of these alternators are used to independently power the air conditioning system NOTE The Power Pack engine controls and starter are 12 volt and receive...

Page 10: ...the engine 2 When the preheat light has gone out depress the start switch to crank the engine CAUTION If the engine should fail to start after 20 30 seconds of cranking Place the Rear Control Switch...

Page 11: ...anual 4 2 or 4 3 7 Starter cranks engages but dies after a few seconds Engine lube oil too heavy Voltage drop in starter cable s 1 4 Check 3 1 2 Engine Starts Then Stops Engine stops after several rot...

Page 12: ...T OFF REAR switch defective Check Tighten Replace Replace Replace Engine Manual Replace 3 2 ALTERNATOR Alternator fails to charge Battery condition Alternator belt loose or broken Loose dirty corroded...

Page 13: ...il and filter 4 3 2 X 3 Pre trip inspection after starting 2 1 b X 4 Check engine hours Run 10 min c Every 1500 Hour Maintenance Normal Operating Conditions X X 1 Complete 400 Hour Maintenance Refer t...

Page 14: ...ercent of an alkaline base radia tor cleaner should be added 6 oz dry to one gallon 4 Run engine 6 to 12 hours and drain system while warm Rinse system three times after it has cooled down Refill syst...

Page 15: ...gine The air clean er is designed toeffectively removecontaminants fromthe air stream entering the engine An excessive accumulation of these contaminants in the air cleaner will impair its op eration...

Page 16: ...water pump V belt is driven by a sheave on the en gine crankshaft Frayed cracked or worn belts must be re placed Adjustment is achieved by altering the position of the front side idler When replacing...

Page 17: ...to compressor 11 Slide compressor enough to clear nylon drive gear Figure 4 4 and remove compressor from unit 12 Drain oil from defective compressor before shipping 13 The original unloader valve mus...

Page 18: ...here is no need to remove pump from can after each use When the compressor is in operation the pump check valve prevents the loss of refrigerant while allowing ser vicemen to develop sufficient pressu...

Page 19: ...5 1 SECTION 5 ELECTRICAL 5 1 INTRODUCTION This section includes the electrical wiring schematic for the DM 4 Power Pack...

Page 20: ...5 2 Figure 5 1 Electrical Wiring Schematic Diagram DM 4 Power Pack Dwg No 061 287 Rev C...

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