Engine Piping Diagrams - Yanmar BY Series Service Manual

Engine Piping Diagrams

ENGINE PIPING DIAGRAMS
(11)
(16)
(11)
(6)
Note: Typical 4BY engine shown. 6BY is similar.
1 – Fuel from Tank
2 – Fuel Filter / Water Separator
3 – Fuel Feed Pump
4 – Fine Fuel Filter
5 – Inlet Fuel Temperature Sensor
6 – High-Pressure Fuel Pump
7 – High-Pressure Fuel Supply Line
8 – Common Fuel Rail
9 – Fuel Injection Line (1 each injector)
10 – Fuel Injector (1 each cylinder)
11 – Fuel Injector Return Fuel Hose
12 – Common Rail Return Fuel Line
13 – Tee
BY Service Manual
Fuel Flow
(10)
(9)
(8)
(12)
(7)
(5)
(18)
(13)
(14)
Figure 3-5
GENERAL SERVICE INFORMATION
(17)
14 – Fuel Return from High-Pressure Pump
15 – Return Fuel to Fuel Tank
16 – Fuel Pressure Sensor
17 – Fuel Pressure Regulator (ECU-Controlled)
18 – High-Pressure Fuel Flow Regulator
(ECU-Controlled)
(1)
(15)
(4)
(2)
(3)
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