Service manual
FUEL
INJECTION
PUMP
SPEED
ADJUSTMENT
(PROPULSION
ENGINE)
The fuel injection pump is the most important component
of
the diesel engine and, therefore, calls for the utmost caution
in handling.
Speed (hertz) and timing are the only adjustments the service
dealer can perform on the injection pump. Other types
of
adjustments or repairs must be performed by a qualified
injection service shop.
Early
Models
without
Electronic
Governing
When servicing the injection pump, the service shop must be
advised
if
the pump is to be used in a generator application.
The service shop will have to remove and replace the
governor spring with a propulsion spring. Once the injector
pump is set up to propulsion specifications, the generator
governor spring is reinstalled in the injection pump and the
pump remounted on the engine. Then set the throttle for
proper engine no-load speed (hertz).
For the disassembling, inspecting, reassembling and internal
adjusting
of
the injection pump, it is recommended that
the pump be taken to a qualified injection service shop
authorized to service Diesel KiKi injection equipment.
The only adjustment the servicing mechanic should make to
the injection pump is the adjustment for engine idle speed.
1. Checking Idle Speed.
a. Warm up the engine.
h. Remove any specks on the crankshaft pulley with a
clean cloth and place a piece
of
suitable reflecting
tape on the pulley to facilitate use
of
a photo-electric
type tachometer.
c. Start and idle the engine.
d. Aim the light
of
the tachometer onto the reflecting tape
to confirm the engine speed.
e. Adjust the idle speed
if
the engine speed is not within
the specified value.
Normal
Idle Speed
71 B 600 - 700
RPM
71 C 580 - 630
RPM
2.
To
adjust the engine idle speed, loosen the lock nut
of
the idle adjustment bolt and tum the bolt clockwise to
increase idle speed and counterclockwise to reduce.
NOTE:
Should engine
RPM
be in question, verify tachometer
readings as shown
at
the instrument panel with a mechanical
or
strobe type tachometer
at
the engine crankshaft.
ADJUSTING
IDLE
SPEED
3. Inspecting and adjusting the injection pump timing.
a. Remove the air intake/silencer assembly.
h. Remove the 4 high pressure injector lines that connect
between the injection pump and injectors.
c. Remove the bolt and gasket installed on the distributor
head
of
the injection pump.
d. Remove the valve rocker cover.
e. Rotate the crankshaft in normal direction
of
rotation
(use front crankshaft pulley nut) and place
No.1
piston
at
IDC
of
its compression stroke.
NOTE:
To
verify, the rocker
arms
of
No.4
cylinder should be
rocking (one opening, the
other
closing).
f. Remove the snap ring circlip from the end
of
the
rocker shaft
at
cylinder No.1 along with the retaining
washer.
g.
Loosen the rocker arm adjusting bolt so as to allow the
arm to be removed from the push rod and slide it off
the rocker shaft.
h. Press down on
the
valve and spring assembly and note
that the valve
is
hitting the top
of
No.1 piston. Then
remove the cap, keepers and valve springs from the
No.1 valve.
NOTE:
Insure the valve
moves
freely in its guide. Take care
not to drop keepers
down
push
rod hole.
i.
Position a dial indicator gauge on the valve stem and
with the front crankshaft pulley nut, rock the crankshaft
counter-clockwise and clockwise to locate exact TDC
of
the compression stroke for No.1 piston and then zero
the dial indicator gauge to the valve stem. (The gauge
should be able
to
measure up to .300 inch
of
valve
movement.)
~~
__
~~==~l=5.21
mm
BTDC
;...
(0.205
in)
t
j.
Tum the crankshaft until the indicator shows the valve
drip to be at .264 inch. This is 30 degrees
BIDC.
k. Install the measuring device (Diesel Kit #57828 -
3520) in the
bolt
hole
of
the injection pump distributor
head. (Refer to step c.) Insure that the feeler needle
of
the measuring device is in contact with the plunger
inside
of
the pump. Zero the measuring device scale.
Engines & Generators
30