4-1
CHAPTER 4. GOVERNORS AND LINKAGE
GENERAL INFORMATION
The TVT engine is equipped with an internal mechanical
governor. The governor’s function is to maintain a R.P.M.
setting when engine loads are added or taken away. This
chapter includes governor assembly linkage illustrations
to aid in governor or speed control assembly.
OPERATION
As the speed of the engine increases, the weights on
the governor gear move outward from centrifugal force
lifting the governor spool. The contact between the spool
and governor rod causes the attached outer governor
lever to push the solid link and close the throttle plate.
When the engine speed decreases, the lower centrifugal
force allows the governor weights to be pulled in by the
governor spring. The governor rod rotates and the solid
link moves the throttle plate to a more open position.
(Illust. 4-1)
4-1
TROUBLESHOOTING
Engine overspeed must be corrected immediately, before
serious engine damage occurs. Erratic engine operation
where the governor is suspect, may be the result of other
engine system problems. Hunting (engine R.P.M. surging
up and down) can be an indication of fuel starvation or
an air leak. Low power (engine will not hold RPM under
load) can indicate, fuel, ignition or internal concerns. Use
the following procedure to diagnose a suspected
governor problem.
ENGINE SPEED ADJUSTMENTS
Before attempting to set the governed high or low RPM
speeds, locate the recommended RPM setting according
to the engine model and specification numbers. These
specifications can be located on microfiche card # 30 or
the computerized parts look-up system.
Start the engine and allow it to warm up to normal
operating temperature (3 - 5 minutes). Set the speed
control to the low speed position. Check the governed
idle speed (not true idle). Adjustment is made by
bending the governor spring bracket upward to increase
the idle RPM or downward to lower idle RPM.
(Illust. 4-2)
Set the speed control to the HIGH or FAST position.
Check engine speed. To adjust, bend the tang on the
control lever upward to increase high speed R.P.M. or
downward to lower high speed R.P.M. (Illust. 4-3)
4-2
GOVERNED IDLE
SPRING BRACKET
4-3
GOVERNOR
SPOOL
GOVERNOR
LEVER
THROTTLE
SPRING
GOVERNOR
SHAFT
WEIGHTS
GOVERNOR
GEAR
To Next Page
Loading...
Need help?
General
