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Main parts maintenance
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7.3.2. Fuel feed pump
1)
General descriptions and construction
The P-type injection pump is mounted with
K-ADS or KP type feed pump. These
pumps have the same basic construction
and operation, and the general descriptions
of the KP type pump are given below :
The figures show its construction (right fig-
ure) and operation (below figure). The pis-
ton in the fuel feed pump is driven by the
push rod and tappet via the camshaft of
injection pump and performs reciprocating
operation to control the suction and delivery
of fuel.
When the cam reaches the Bottom Dead Center as shown in the figure, the fuel is drawn in through the
check valve on the inlet side. The fuel pressurized as the cam rotates on flows through the check valve on
the outlet side as shown in (B). If feeding pressure increases abnormally, the spring is compressed,
resulting in interrupting further delivery of fuel as shown in (C).
This feed pump is mounted with a priming pump designed to permit manual feeding of fuel from the fuel
tank with the injection pump mounted in the engine. During the manual feeding operation, air must be bled
from the fuel lines. When using the priming pump, fix it securely to prevent the possible entry of moisture
or other foreign substances in the inside of the feed pump.
Check valve
Check valve
Priming
pump
Piston
Suction
Discharge
Tappet
Camshaft EQM4019I
Check
valve
Check valve
Priming
pump
Piston
Inlet
side
Outlet
side
Tappet
Camshaft
EDV2218165
EQM4020I
(A)
(B)
(C)
Inlet side
Outlet side
Interruption
Содержание AD158TI
Страница 2: ......
Страница 16: ...Specification 10...
Страница 25: ...Commissioning and operation 19 2 Digital gauge panel Circuit diagram EDV2218035...
Страница 34: ...Commissioning and operation 28...
Страница 56: ...General information 50...
Страница 70: ...Main accessory parts 64...
Страница 120: ...Disassembly and assembly of major components 114...
Страница 172: ...Main parts maintenance 166...
Страница 187: ...Governor Actuator Controller...
Страница 188: ......
Страница 221: ...33 6 Product dimension 170 130 140 153 165 6 19 4 6 EDL11160004...
Страница 253: ...HY DP MANUAL 001 Digital Panel for Marine Engines Service Manual Ver 1 0 Doosan Infracore...
Страница 294: ......