Westerbeke W-46 - Page 63

FUEL SYSTEM
1. Fuel Injection Pump (DPA).
Description
The DPA injection pump is a
distributor type pump con-
sisting of a transfer pump,
fuel pumping plunger, distri-
buting device, automatic ad-
vance, mechanical governor and
control linkage, which are
built into a compact, light-
weight pump housing. Function-
ally, this pump features a pair
of pumping plungers for meter-
ing and delivering fuel.
DPA Fuel Injection Pump
21 20 19 18 17 16 15 14 13 12 11
3
1
1-Drive hub seal
2-Governor weight
3-Drive shaft
4-Thrust sleeve
5-Pump housing
6-Automatic advance
7-Cam advance screw
2
4 5 6
7 8
S-Head locating stud
9-Shut-off solenoid valve
10-End plate (regulating valve)
11-Transfer pump
12-Head & rotor assembly
13-Hydraulic head
14-Rotor
9 10
15-Metering valve
16-Plunger
17-Cam roller
18-Governor spring
19-Governor arm bracket
20-Governor arm
21-Shut-off shaft
DPA Fuel Injection Pump - Sectional View
(NOTE: Ref :ft: 3 Drive Shaft
drive shaft; later pumps
with master spline.)
- earlier pumps had a keyed
had a splined drive shaft
Engines & Generators
61