Cummins NT855 Parts Catalogue
The Cummins NT855 Parts Catalogue provides a detailed reference for all components of the NT855 engine. The NT855 is one of Cummins’ classic heavy-duty diesel engines, widely used in trucks, construction machinery, marine applications, and power generation. This catalogue helps engineers, operators, and maintenance personnel accurately identify part numbers and technical specifications required for service and repair.
Overview of NT855 Engine Components
The Cummins NT855 engine is composed of several critical systems and assemblies:
1. Engine Components
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Pistons and Piston Rings: Maintain combustion efficiency and durability.
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Crankshaft and Bearings: Deliver smooth rotational power.
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Camshaft and Valves: Control air intake and exhaust timing.
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Cylinder Heads: Contain injectors and valves for combustion.
2. Fuel System
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Fuel Injectors: Deliver precise fuel volume into the cylinders.
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Fuel Pumps: Ensure reliable pressure for injection.
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Fuel Manifolds: Distribute fuel evenly across cylinders.
3. Air and Turbo System
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Turbochargers: Boost air intake for improved efficiency and output.
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Air Intake Manifold: Balances airflow to cylinders.
4. Filtration
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Oil Filters: Remove contaminants from engine lubrication.
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Fuel Filters: Keep the fuel supply clean.
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Air Filters: Protect cylinders from dust and debris.
5. Electrical and Sensors
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Starter Motors and Alternators: Ensure reliable engine starting and electrical supply.
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Pressure Sensors: Monitor fuel and oil pressure.
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Speed Sensors: Provide accurate engine RPM readings.
6. Gaskets and Seals
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Complete gasket sets seal key engine joints, preventing oil, coolant, or air leaks.
Example Parts Table
| NO. | Parts Name | Parts No. | Engine Model | NO. | Parts Name | Parts No. | Engine Model | |
| 1 | Cylinder Block | 3081283/4914774 | NT855 | 96 | Injector | 4914325 | NT855 | |
| 2 | Cylinder Head | 4915442 | NT855 | 97 | Injector Sleeve | 3406702 | NT855 | |
| 3 | Crankshaft | 3608833 | NT855 | 98 | Intake Valve | 135957 | NT855 | |
| 4 | Camshaft | 111888 | NT855 | 99 | Intake Valve | 3803512 | NT855 | |
| 5 | Camshaft | 129860 | NT855 | 100 | Valve Collet | 127554 | NT855 | |
| 6 | Camshaft | 143450 | NT855 | 101 | Valve Insert | 200354 | NT855 | |
| 7 | Camshaft | 3023177 | NT855 | 102 | Valve Insert | 3017759 | NT855 | |
| 8 | Camshaft | 3049023 | NT855 | 103 | Valve Stem Guide | 3006456 | NT855 | |
| 9 | Camshaft | 3801763 | NT855 | 104 | Valve Spring | 211999 | NT855 | |
| 10 | Camshaft | 3025518 | NT855 | 105 | Valve Spring Guide | 170296 | NT855 | |
| 11 | Camshaft | 3026975 | NT855 | 106 | Valve Spring Guide | 4913845 | NT855 | |
| 12 | Camshaft | 3042568 | NT855 | 107 | Turbocharger | 3529032 | NT855 | |
| 13 | Camshaft | 3608786 | NT855 | 108 | Alternator | 4060811 | NT855 | |
| 14 | Camshaft | 3053525 | NT855 | 109 | Alternator | 3016627 | NT855 | |
| 15 | Camshaft | 3608787 | NT855 | 110 | Starter Motor | 5284083 | NT855 | |
| 16 | Camshaft | 3068668 | NT855 | 111 | Housing Rocker | 3044788 | NT855 | |
| 17 | Camshaft | 3108668 | NT855 | 112 | Rocker Lever Housing | 3044787 | NT855 | |
| 18 | Camshaft | 3051132 | NT855 | 113 | Rocker Lever | AR2308 | NT855 | |
| 19 | Camshaft | 3049024 | NT855 | 114 | Rocker Lever | AR2307 | NT855 | |
| 20 | Camshaft | 3025517 | NT855 | 115 | Rocker Lever | BM95161 | NT855 | |
| 21 | Camshaft | 3026972 | NT855 | 116 | Rocker Lever | 3017571 | NT855 | |
| 22 | Camshaft | 3044767 | NT855 | 117 | Rocker Lever Shaft | 3038904 | NT855 | |
| 23 | Camshaft | 3801668 | NT855 | 118 | Push Rod | 3046420 | NT855 | |
| 24 | Camshaft | 3801769 | NT855 | 119 | Push Rod | 3046430 | NT855 | |
| 25 | Camshaft | 4913963 | NT855 | 120 | Cam Follower | 3081251 | NT855 | |
| 26 | Camshaft | 3058957 | NT855 | 121 | Cam Follower Lever | 3056568 | NT855 | |
| 27 | Camshaft | 4914522 | NT855 | 122 | Cam Follower Shaft | 3065125 | NT855 | |
| 28 | Camshaft | 3090874 | NT855 | 123 | Cam Follower Lever | 3081250 | NT855 | |
| 29 | Camshaft | 3801448/3036697 | NT855 | 124 | Main Bearing Cap | 3008047 | NT855 | |
| 30 | Camshaft | 3801749 | NT855 | 125 | Main Bearing Cap | 3008048 | NT855 | |
| 31 | Camshaft | 3801030 | NT855 | 126 | Main Bearing Cap | 3008049 | NT855 | |
| 32 | Camshaft Gear | 3035195 | NT855 | 127 | Rocker Lever Cover | 3006183 | NT855 | |
| 33 | Cylinder Liner | 3055099/3801826 | NT855 | 128 | Rocker Lever Gasket | 3067459 | NT855 | |
| 34 | Engine Piston | 3011295 | NT855 | 129 | Crankcase Breather | 4913633 | NT855 | |
| 35 | Engine Piston | 3017348 | NT855 | 130 | Crankcase Breather | 255180 | NT855 | |
| 36 | Engine Piston | 3017349 | NT855 | 131 | Restriction Indicator | 178957 | NT855 | |
| 37 | Engine Piston | 3051554 | NT855 | 132 | Crankshaft Pulley | 211918 | NT855 | |
| 38 | Engine Piston | 3051555 | NT855 | 133 | Vibration Damper | 3101655 | NT855 | |
| 39 | Engine Piston | 3051556 | NT855 | 134 | Fan Pulley | 211869 | NT855 | |
| 40 | Engine Piston | 3051557 | NT855 | 135 | Fan Hub | 3012649 | NT855 | |
| 41 | Engine Piston | 3095738 | NT855 | 136 | Flywheel Ring Gear | 4851 | NT855 | |
| 42 | Engine Piston | 3076817 | NT855 | 137 | Flywheel | 3023510 | NT855 | |
| 43 | Engine Piston | 3076811 | NT855 | 138 | Flywheel Housing | 3005557 | NT855 | |
| 44 | Engine Piston | 3048808 | NT855 | 139 | Oil Filter Element | 3401544 | NT855 | |
| 45 | Engine Piston | 3028706 | NT855 | 140 | Fuel Water Separator | 3329289 | NT855 | |
| 46 | Engine Piston | 3069212 | NT855 | 141 | Corrosion Resistor | 4058965 | NT855 | |
| 47 | Engine Piston | 3074494 | NT855 | 142 | Air Cleaner | 3103262 | NT855 | |
| 48 | Engine Piston | 3048650 | NT855 | 143 | Accessory Drive Pulley | 3023473 | NT855 | |
| 49 | Engine Piston | 3095739 | NT855 | 144 | Accessory Drive Pulley | 3013336 | NT855 | |
| 50 | Engine Piston | 3095745 | NT855 | 145 | Piston Cooling Nozzle | 3013591/3014404 | NT855 | |
| 51 | Engine Piston | 4296367 | NT855 | 146 | Rocker Lever Housing Gasket | 3017750 | NT855 | |
| 52 | Engine Piston | 4296367 | NT855 | 147 | V Ribbed Belt | 5413187 | NT855 | |
| 53 | Engine Piston | 4913782 | NT855 | 148 | Drive Belt | 178708 | NT855 | |
| 54 | Piston Ring Set | 4295801 | NT855 | 149 | Fuel Filter Head | 212013 | NT855 | |
| 55 | Piston Ring Set | 3801056/4089810 | NT855 | 150 | Rear Cover | AR10833 | NT855 | |
| 56 | Piston Ring Set | AR11930/4089793 | NT855 | 151 | Cover Gasket | 3067616 | NT855 | |
| 57 | Piston Ring Set | 3803471/4089811 | NT855 | 152 | Oil Seal | 4346552 | NT855 | |
| 58 | Piston Pin | 191970 | NT855 | 153 | Magnetic Pickup | 3034572 | NT855 | |
| 59 | Retainer Ring | 205269 | NT855 | 154 | Engine Fan | 3655107 | NT855 | |
| 60 | Bearing Set | 3801260 | NT855 | 155 | Fuel Supply Tube | 3033005 | NT855 | |
| 61 | Bearing Set | 3801261 | NT855 | 156 | Fuel Supply Tube | 3033007 | NT855 | |
| 62 | Bearing Set | 3801262 | NT855 | 157 | Fuel Drain Tube | 4914641 | NT855 | |
| 63 | Bearing Set | 3801263 | NT855 | 158 | Fuel Drain Tube | 4914642 | NT855 | |
| 64 | Bearing Set | 3801264 | NT855 | 159 | Aftercooler | 4915052 | NT855 | |
| 65 | Con Rod Bearing | 214950 | NT855 | 160 | Aftercooler Core | 4914196 | NT855 | |
| 66 | Con Rod Bearing | 214951/3150012 | NT855 | 161 | Aftercooler Cover | 3046170 | NT855 | |
| 67 | Con Rod Bearing | 214952/3150013 | NT855 | 162 | Air Intake Manifold | 3609930 | NT855 | |
| 68 | Con Rod Bearing | 214953/3150014 | NT855 | 163 | Oil Cooler | 4061462 | NT855 | |
| 69 | Con Rod Bearing | 214954 | NT855 | 164 | Cooler Core | 3412285 | NT855 | |
| 70 | Connecting Rod | 3013930 | NT855 | 165 | Oil Gauge Tube | 108012 | NT855 | |
| 71 | Bushing | 187420 | NT855 | 166 | Dipstick | 3009777 | NT855 | |
| 72 | Con Rod Bolt | 3349806 | NT855 | 167 | Oil Pan | 3655417 | NT855 | |
| 73 | Bushing | 3028075 | NT855 | 168 | Oil Pan Gasket | 3099083 | NT855 | |
| 74 | Bushing | 3011951 | NT855 | 169 | Flexible Hose | 3655112 | NT855 | |
| 75 | Bushing | 3028269 | NT855 | 170 | Hexagon Head Cap Screw | 3071161 | NT855 | |
| 76 | Upper Engine Gasket Set | 3801330/4915302 | NT855 | 171 | Cam Follower Housing Gasket | 3074400 | NT855 | |
| 77 | Lower Engine Gasket Set | 3014459/4915303 | NT855 | 172 | Cylinder Head Gasket | 4058790 | NT855 | |
| 78 | Water Pump Kit | 3801708/3051408 | NT855 | 173 | Valve Crosshead | 4061141 | NT855 | |
| 79 | Water Pump | 4915398/3801788 | NT855 | 174 | Air Crossover Connection | 211657 | NT855 | |
| 80 | Water Pump Kit | 2882038/4919971 | NT855 | 175 | Exhaust Manifold | 3026051 | NT855 | |
| 81 | Water Pump | 3062928/4955803 | NT855 | 176 | Exhaust Manifold | 3031186 | NT855 | |
| 82 | Water Pump | 3000896/3022483 | NT855 | 177 | Exhaust Manifold | 3031187 | NT855 | |
| 83 | Service Kit | 3390113/3801380/3801712 | NT855 | 178 | Water Manifold | 4060823 | NT855 | |
| 84 | Idler Pulley | 3064919 | NT855 | 179 | Thermostat | 3076489 | NT855 | |
| 85 | Oil Pump | 3609833/4345692 | NT855 | 180 | Thermostat Housing | 3036211 | NT855 | |
| 86 | Oil Pump | 3609837 | NT855 | 181 | Thermostat Seal | 186780 | NT855 | |
| 87 | Oil Pump | 3042381/AR12341 | NT855 | 182 | Thermostat Housing Gasket | 208128 | NT855 | |
| 88 | Oil Pump | 3085379/3804535 | NT855 | 183 | Muffler | 3418930 | NT855 | |
| 89 | Air Compressor | 3018534 | NT855 | 184 | Exhaust Outlet Connection Gasket | 3418939 | NT855 | |
| 90 | Fuel Pump | 3059657 | NT855 | 185 | Exhaust Outlet Connection | 3418944 | NT855 | |
| 91 | Shutoff Valve | 3018453 | NT855 | 186 | Exhaust Outlet Connection | 3418954 | NT855 | |
| 92 | Fuel Pump Gear | 3034245 | NT855 | 187 | Exhaust Connection Gasket | 3419000 | NT855 | |
| 93 | Fuel Pump Gear | 3033772 | NT855 | 188 | Exhaust Outlet Connection | 203555 | NT855 | |
| 94 | Electronic Fuel Control Actuator | 3408324 | NT855 | 189 | Turbocharger Gasket | 106322 | NT855 | |
| 95 | Governor Control | 3044196 | NT855 |
The table above provides a sample of commonly used parts. The full Cummins NT855 Parts Catalogue contains all engine parts, accessories, and service kits required for repair and maintenance.
