Volvo EPA2007 D13F Reference Manual page 102

96 ENGINE COMPONENT AND LOCATION
1 Fuel Pump
2 Fuel Tank and Inlet Tube
3 EECU Cooler
4 Fuel Filter Housing
5 Fuel Pre-Filter
6 Water Cup
7 Secondary (Main) Filter
8 Fuel Gallery
9 Unit Injector
10 Pressure Regulator Valve
11 Pump Safety Valve (Pressure
Regulator)
12 One-Way Valve
13 Hand Pump Handle
14 Water Level Sensor
15 Water Discharge Control Switch
(Instrument Panel)
The fuel pump attaches with the power steering pump to the flywheel housing at the
rear left side. It turns on the same shaft as the power steering pump. The common
drive gear meshes with the auxiliary idler driven by the crankshaft gear. At 600 rpm,
the pump delivers a minimum 100 kPa (14.5 psi), and at 1200 rpm, 300 kPa (43.5
psi). At 400–550 kPa (58?80 psi), the gallery regulator valve opens to control fuel
gallery pressure.
Fuel is drawn by the pump from the tank into the EECU cooling plate and the primary
filter at the left side of the engine and on to the pump inlet. Under pressure, fuel then
flows from the pump to the secondary filter and the fuel gallery in the cylinder head.
Fuel pressure within the gallery is controlled by a pressure regulator valve which
returns excess fuel to the tank.
16 Electrical Water Drain Valve
17 Automatic Air Bleed Valve ( closes
when filter removed)
18 Service Port (Pressure Gauge)
19 Supply Pressure Sensor
20 Fuel Heater (Optional)
21 Service Shut-Off Valve ( closes when
filter removed)
22 One-Way Valve ( Hand Priming)
23 Automatic Bleed Valve
24 Fuel Tank Breather
25 AFI Shut-Off Valve
26 Line to AFI
27 Deaeration Valve