3. 4JB1 engine Technical configuration
3.1 4JB1 engine Fuel injection pump
3.1.1 BQ2000 inline plunger fuel injection pump
3.1.2 GAC digital electronic governor

3.2 4JB1 engine Flywheel housing
3.2.1 for 4JB1 & 4JB1T
3.2.1.1 Flywheel housing S.A.E. 4#
3.2.1.2 Spigot diameter Φ361.95 +0.089
3.2.1.3 Mounting bolt hole 12-M10-6H
3.2.1.4 Pitch circle diameter of mounting bolt hole Φ381
3.2.1.5 Runout tolerance between flywheel end face/spigot and crankshaft center <0.3mm
3.2.2 for 4JB1TA
3.2.2.1 Flywheel housing S.A.E. 3#
3.2.2.2 Spigot diameter Φ409.575 +0.155
3.2.2.3 Mounting bolt hole 12-M10-6H
3.2.2.4 Pitch circle diameter of mounting bolt hole Φ428.625
3.2.2.5 Runout tolerance between flywheel end face/spigot and crankshaft center <0.3mm
3.3 4JB1 engine Flywheel disc
3.3.1 for 4JB1 & 4JB1T
3.3.1.1 Flywheel disc standard S.A.E. 7½”
3.3.1.2 Spigot diameter Φ241.3 +0.072
3.3.1.3 Mounting bolt hole 8-M8-7H
3.3.1.4 Pitch circle diameter of mounting bolt hole Φ222.25
3.3.1.5 Distance to the end face of flywheel housing 30.2mm
3.3.2 for 4JB1TA
3.3.2.1 Flywheel disc standard S.A.E. 11½”

3.3.2.2 Spigot diameter Φ352.42 +0.081
3.3.2.3 Mounting bolt hole 8-M10-7H
3.3.2.4 Pitch circle diameter of mounting bolt hole Φ333.38
3.3.2.5 Distance to the end face of flywheel housing 39.6mm
3.4 4JB1 engine Cooling fan
3.4.1 Direct connection cooling fan
3.4.2 Diameter of cooling fan: Φ420 for 4JB1 and 4JB1T; Φ430 for 4JB1TA
3.5 4JB1 engine Air filter & intake hose
3.5.1 Air flow rate 250m³/h
3.5.2 To be installed above flywheel housing and connected with air intake port by rubber hose
3.6  4JB1 engine Exhaust pipe
3.6.1 To be installed upward, coming with bellow, joint flange of exhaust & plastic dust cap
3.7 4JB1 engine Fuel filter
3.7.1 Coming with fuel filter, replacement instruction imprinted outside of fuel filter element in English
3.8 4JB1 engine Oil filter
3.8.1 Coming with oil filter/cooler, replacement instruction imprinted outside of oil filter element in English
3.9 4JB1 engine Starter
3.9.1 Voltage 12V, output 2.8kW

3.10 4JB1 engine Alternator
3.10.1 AC generator, output 14V, 50A