GOVERNOR
DESCRIPTION
The
governor keeps engine speed constant by using a bal-
ance between the centrifugal force acting on the governor
weights and the tension
of
the governor spring.
If engine speed increases, the governor weights will open,
forcing the sliding shaft forward. This moves the injection
pump fuel rack, linked to the sliding shaft through the
gover-
nor lever assembly, tie-rod and spring,
in
the direction that
injects less fuel into the cylinders. The movement is stopped
at a point where the centrifugal force
of
the governor weights
balances with the tension
of
the governor spring.
If engine speed is decreased by an overload, the control rack
is pushed against the smoke set spring in the direction that
injects more fuel. The Angleich mechanism restricts the
increase and quantity
of
fuel injection thus preventing over-
load, saving fuel, and decreasing exhaust smoke.
GOVERNOR
lEVER
GOVERNOR
WEIGHT
~"":::::::::::ll.~I~:;;±::H1
__
SLloING
SHAFT
GOVERNOR
SHAFT
PUMP
GEAR
PUMP
CAMSHAFT
r:....!...U--_--lolER
GEAR
GEAR
CASE
NEEDLE
BEARING
GOVERNOR
LEVER
GOVER~IOR
SHAFT
NEEDLE
BEARING
f---,..........-rJ'---
GOVERNOR
SPRING
GOVERNOR
SPEED
CONTROL
lEVER
DISASSEMBLY
1.
Remove
the,
drive belt (see FRESH WATER COOLING
SERVICE).
2. Remove the crankshaft pulley nut and remove the pulley.
3. Remove the fuel injection pump (see
Fuel Injection
Pump under FUEL SYSTEM)
4. Remove the gear case mounting bolts and remove the
gear case (see
CA UTION under DISASSEMBLY, CYLIN-
DER
BLOCK
SERVICE).
5. Remove the governor spring.
6. Remove the nut, washer, spring lever. Remove the speed
control lever from the gear case.
7.
Remove the nut, washer and spring lever, remove the
governor lever set bolt, and remove the governor lever.
S.
Remove the governor weight assembly and the sliding
shaft from the injection pump camshaft.
9. Remove the tie-rod and spring from the governor lever.
GOVERNOR
LEVER
SECTION
OF
GEAR
CASE
INSPECTION
1. Check the governor weights for wear and damage.
Replace if defective.
2. Check the sliding shaft for damage and stiff movement.
Replace
if
defective.
Governor
Lever
Check the sliding shaft contact area
of
the governor lever and
check the tie-rod and spring which connect the governor
lever to the fuel rack. Replace
if
defective.
Governor
Spring
Check the spring for deterioration and breakage. Replace
if
defective. When overhauling, replace the spring.
Needle
Bearing
Check the needle bearing supporting the governor lever shaft
in
the gear case for damage.
REASSEMBLY
AND
ADJUSTMENT
To
reassemble the governor, reverse the order
of
disassembly.
After reassembly, check the governor for smooth operation.
Engines & Generators
31
To Next Page
Loading...
Need help?
General
