LINER GP-BODY 2149327 - Caterpillar

Dashpot Governor Adjustment
Note: Low idle adjustment is the same as shown for hydra-mechanical governors.
Illustration 40 g02968533
(1) Low idle screw
(2) High idle screw
(3) Cover
(4) Dashpot reservoir
(5) Adjustment screw for dashpot
(6) Adjustment screw for supply oil to reservoir If the dashpot governor (of some special application engines) does not work correctly (no stability of rpm, or slow changes of rpm when the engine load changes, or variable performance), adjust the governor.
With the engine in operation, loosen adjustment screw (6) two or three turns. The oil flow will clean the orifice in the oil passage. Next, tighten screw (6) until it stops. Then, loosen screw (6) only 1/4 to 1/2 turn, to give the correct amount of oil for dashpot reservoir (4).
Loosen adjustment screw (5) two or three turns. The oil flow in and out of the dashpot chamber will clean the orifice in the oil passage. Next, tighten screw (5) until it stops. Then, loosen screw (5) only 3/4 to one full turn, to make the correct restriction for dashpot operation. The exact point of adjustment is where the governor gives the best performance. Adjustment Of Hydraulic Fuel Ratio Control
Table 18
Tools Required
6V-9128 Rack Position Tool Gp 1
6V-3075 Dial Indicator 1
3S-3269 Indicator Contact Point 1
3P-1565 Collet Clamp 1
9S-7350 Bracket Gp 1
Illustration 41 g02968619
Hydraulic Fuel Ratio Control
(1) Valve
(2) Pin
(3) Cover
The fuel rack setting must be correct before the adjustment for the fuel ratio control can be checked. Make reference to Fuel Rack Setting. Note: The 6V-3075 Dial Indicator and and 9S-7350 Bracket Gp for fuel rack setting is used for the adjusment of fuel ratio control.
Remove cover (3) from the fuel ratio control.
Making contact with a running engine can cause burns from hot parts and can cause injury from rotating parts.When working on an engine that is running, avoid contact with hot parts and rotating parts.
Start the engine.
Push the end of valve (1) in and hold it in for two or three seconds. This action will manually move the valve into its operating position.
Move the governor control lever in the "Fuel On" direction, then return it to "Low Idle". Do this several times to remove the air from the oil in the control. This will make the result of the test more accurate.
Rapidly move the governor control lever in the "Fuel On" direction. Read the maximum measurement on the dial indicator. This is the dynamic fuel ratio control setting. See the Fuel Setting in TMI for the correct setting.
To make an adjustment to the fuel ratio control, turn valve (1) in a clockwise direction to increase the amount of fuel possible (more rack travel) at the limited rack position. Turn the valve counterclockwise to decrease the amount of fuel possible (less rack travel).
After an adjustment is made, the governor control lever must be moved rapidly from the low idle position in the fuel-on direction before an accurate reading can be made.
After the correct adjustment has been made, put cover (3) in alignment with pin (2) in the