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 3161 GOVERNOR
TESTING AND ADJUSTING
To increase the engine low idle speed, turn
On 3500 Series Engines equipped with 3161
screw (1) clockwise.
Governors with torque rise there are two static fuel
settings. One is torque rise, which is maximum travel,
Turn high idle speed stop screw (3) clockwise to
and is set with the fuel setting screw.
decrease high idle speed.
The second setting is full load, which is a
"reference position" where the fuel control linkage is held
while the torque rise cam is adjusted. This is a
temporary setting set with the synchronizing pin. This
setting is shown in the Fuel Setting and Related
Information Fiche as "full load."
Torque rise fuel setting is greater than full load
fuel setting, thus making the torque rise setting the
"maximum travel" setting of the fuel control linkage.
INSTALL COVER
2. Plate.
When the high and low idle speeds are adjusted
to the specifications given in the Fuel Setting and
Related Information Fiche, install the plate and the two
bolts. Put a seal wire through the holes in the bolt heads
and install the seal as required on other Caterpillar fuel
systems.
TORQUE RISE SETTING (ON 3500 SERIES ENGINES)
INSTALL SYNCHRONIZING PIN
Tools Needed:
1. Synchronizing pin. 2. Plug. 3. Plug.
6V3139 Timing and Fuel Setting Tool Group.
5P4814 Collet.
2.
Remove plugs (2) and (3) from each side of the
6V3075 Dial Indicator (two required).
fuel setting cover.
5P7263 Contact Point, 76.2 mm (3.00 in.)
long.
3.
Remove synchronizing pin (1) from the cover
FT1819 Governor Torque Arm Tool.
and remove the washer from it.
Install
9S228 Rack Position Tool Group.
synchronizing pin (1) in the threaded hole for
9S225 Bracket Assembly.
plug (2) and tighten it.
3S3269 Contact Point, 25.4 mm (1.00 in.)
long.
1.
Look in the Fuel Setting and Related Information
Fiche to find the correct engine fuel setting,
torque rise and full load.
In the past only "static fuel setting" was listed in
the Fuel Setting and Related Information Fiche for the
3500 Series Engines. This fuel setting was "maximum
travel" and listed as "static fuel setting."
MOVE FUEL CONTROL LINKAGE AGAINST THE
On 3500 Series Engines equipped with a 3161
SYNCHRONIZING PIN
Standard or Generator Set Governor, the fuel setting
4. FT1819 Governor Torque Arm Tool.
procedure has not changed. The fuel setting screw is
used to set the "maximum travel" but the specification in
4.
Use tool (4) to move and hold the fuel control
the Fuel Setting and Related Information Fiche has
linkage in the "FUEL ON" direction against the
changed
and
is
shown
as
"full
load."
synchronizing pin.
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