Governor
completely assembled machine. The RPM should be measured
with the mower on a hard surface to eliminate cutting load on
the blade.
Contents
If a governor spring must be replaced, consult the appropriate
Toro Illustrated Parts List.
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Governed RPM Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical Governor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassemble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspect Governor . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assemble Governor Crank . . . . . . . . . . . . . . . . . . . . .
Install Crankcase Cover or Sump . . . . . . . . . . . . . . . .
Adjust Top No Load RPM . . . . . . . . . . . . . . . . . . . . .
Seal Protectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25
25
25
25
26
26
26
26
26
CAUTION
AFTER A new governor spring is installed, check
engine top no load speed.
Run engine at half throttle to allow the engine to reach normal
operating temperature before measuring speed with a
tachometer.
Toro rotary mowers should be set to run at 3,000 RPM 150,
which will produce blade tip speeds of 19,000 feet per minute.
General Information
The governor spring tends to pull the throttle open. The force
of the counterweights, which are operated by centrifugal
force, tends to close the throttle. The engine speed at which
these two forces balance is called the governed speed. The
governed speed can be varied by changing governor spring
tension or governor spring, Fig. 42.
If a service replacement engine is used, check the top no load
speed with the engine operating on a completely assembled
mower. If necessary, change the governor spring or adjust the
top no load speed limit device, so the engine will not exceed
the recommended speed. See page 26 for adjustment
procedure for mechanical governor.
Mechanical Governor
The mechanical governor used is illustrated in Fig. 43, and is
part of the oil slinger assembly. The governor crank is
mounted in the cylinder assembly.
1
2
Fig. 42 – Governor Spring
(blower housing removed)
1
1.
Governor spring
4
3
Fig. 43 – Governor
1.
2.
Governor cup
3.
Governor gear and oil
slinger
Governed RPM Limits
Governor weight pins
4.
Governor crank
To comply with specified top no-load speed limits, engines
use either calibrated governor springs or an adjustable top no
load speed. Calibrated springs or an adjustable top no load
speed limit will allow no more than a desired top governed
speed when the engine is operated on a rigid test stand.
However, the design of the cutter blade, deck, etc., can affect
engine speeds. Therefore, the top no load speed should be
checked with a tachometer when the engine is operated on a
Disassemble
1.
Before governor can be serviced, drain oil from engine and
remove crankcase sump, page 53.
2.
Loosen governor lever bolt and nut, Fig. 44.
GTS 200
25
Governor
| Categories | Lawn Mower Manual, Parts and Accessories Manuals, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro GTS 200 |
| Download File |
|
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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