CONE-BEARING 7K9263 - Caterpillar

C3.3B and C3.8 Tier 4 Interim / Stage IIB
Illustration 1 g03662171
(C) Engine ECM
(1) Key switch ON signal
(2) Starter switch signal
(3) Emergency stop switch
(4) Oil pressure switch
(5) Engine warning light signal
(6) Glow (air heater) lamp signal
(7) Starter relay
(8) Fuel temperature sensor
(9) Glow (air heater) relay
(10) Supply pump
(11) Suction Control Valve (SCV)
(12) Rail pressure sensor
(13) Rail
(14) Supply pump
(15) Mass air flow sensor
(16) Injector
(17) NRS DC motor
(18) NRS lift sensor
(19) Intake air heater
(20) Intake air pressure sensor
(21) Intake air temperature sensor
(22) Coolant temperature sensor
(23) Crankshaft position sensor
(25) Camshaft position sensorC3.8 Tier 4 Final / Stage IV
Illustration 2 g03883302
Diagram of SCR System
(A) Can1 Communication (For Service)
(B) Can2 Communication (For OEM Machine)
(C) Engine ECU (Electronic Control Unit)
(a) To Fuel Tank
(b) To SCR (Selective Catalytic Reduction) Muffler Full Assembly
(1) Key Switch ON Signal
(2) Starter Switch Signal
(3) Emergency Stop Switch
(4) Oil Pressure Switch
(5) CAN 1 Communication for Service
(6) CAN 2 Communication for OEM Machine (Accelerator Position Signal, Neutral Switch, Machine Travel Speed Signal)
(7) Engine Warning Light Signal
(8) Stop Lamp Signal
(9) Oil Pressure Warning Lamp Signal
(10) Overheat Lamp Signal
(11) Glow (Air Heater) Lamp Signal
(12) Starter Relay
(13) Air Heater Relay
(14) PCV (Pre-Stroke Control Valve)
(15) Supply Pump
(16) Rail Pressure Sensor
(17) Rail
(18) PRV (Pressure Reducing Valve)
(19) Mass Air Flow Sensor
(20) Injector
(21) Inter Cooler
(22) EGR DC Motor
(23) EGR Lift Sensor
(24) Intake Throttle Valve
(25) Intake Air Heater
(26) Boost Pressure Sensor
(27) Intake Air Temperature Sensor
(28) Coolant Temperature Sensor
(29) Crankshaft Position Sensor
(30) Diesel Particulate Filter (DPF) Muffler
(31) Camshaft Position Sensor
(32) Exhaust Gas Temperature Sensor2 (T2) (DPF Outlet Exhaust Gas Temperature)
(33) Differential Pressure Sensor (DPF Differential Pressure
(34) Exhaust Gas Temperature Sensor1 (T1) (DPF Inlet Exhaust Gas Temperature)
(35) Exhaust Gas Temperature Sensor0 (T0) (DOC Inlet Exhaust Gas Temperature)C3.3B Sensor Locations
Illustration 3 g03662272
(1) Intake air temperature sensor
(2) NRS valve connector
(3) Fuel rail pressure sensor
(4) Engine oil pressure switch
(5) Fuel temperature sensor
(6) Suction control valve
(7) Crankshaft position sensor
(8) Coolant temperature sensor
(9) Intake throttle valve
Illustration 4 g03429845
(10) Camshaft position sensor
(11) Intake air pressure sensor
(12) DPF differential pressure sensor
(13) DPF outlet temperature sensor
(14) DPF inlet temperature sensor
(15) DOC inlet temperature sensorC3.8 Sensor Locations
The sensors are the same between the C3.8 Tier 4 Interim / Stage IIIB and C3.8 Tier 4 Final / Stage IV, except for the common rail manifold and high pressure pump. The following two illustrations are for the C3.8 Tier 4 Final / Stage IV.
Illustration 5 g06145363
Common Rail Manifold
Illustration 6 g06145369
Illustration 7 g03283341
Right side view of engine
(1) NRS valve sensor
(2) Fuel rail pressure sensor - C3.8 Tier 4 Interim / Stage IIIB only
(3) Suction control valve
(4) Fuel temperature sensor - C3.8 Tier 4 Interim / Stage IIIB only
(5) Engine wiring harness connector
(6) Machine wiring harness connector
(7) Engine ECM
Illustration 8 g03283357
Left side view of engine
(8) Camshaft speed/timing sensor
(9) Crankshaft speed/timing sensor
(10) Engine oil pressure switch
Illustration 9 g03283398
Top view of engine
(11) Coolant temperature sensor
(12) Boost pressure sensor
(13) Air temperature sensor
(14) DOC inlet temperature sensor
(15) DPF inlet temperature sensor
(16) DPF outlet temperature sensor
(17) DPF differential pressure sensor