PUMP GP-PISTON 2896370 - Caterpillar

Parts are: 1-Center lever. 2-Right end lever. 3-Governor lever. 4-Governor to center lever rod. 5-Carburetor lever. 6-End lever-to-right carburetor lever rod. 7-Left end lever. 8-Carburetor lever. 9-End lever-to-left carburetor lever rod.Later Engines
LATER ENGINE CONTROL LINKAGE
Effective with G399-49C173-Up, G398-73B796-Up, G379-72B404-Up.1. Assemble end levers (2) to cross shaft at angle of 135° from center lever (1) as shown.2. With throttle plates closed, assemble carburetor levers (5) and (7) on carburetor throttle shaft at 45° angles from horizontal as shown.3. Position center lever (1) vertically and adjust and install rods (6) with both throttle plates in the CLOSED position.4. Open the throttle plates to check proper positioning of levers.5. With governor lever (3) at SHUTOFF position, adjust and install rod (4) between center lever (1) and governor lever (3) while still maintaining the vertical position of center lever.6. Make necessary carburetor and gas regulator adjustments. See covering topics.Fuel Ratio Control
Operation
The fuel ratio control coordinates the movement of the fuel rack with the amount of air available in the inlet manifold, keeping exhaust smoke to a minimum.Later controls have a manually operated override lever (1) to allow unrestricted rack movement during cold starts. After the engine starts, the override automatically resets in the RUN position.Collar (6) mechanically connects with the fuel rack, as explained in the topic, BASIC GOVERNOR OPERATION. The head of bolt assembly (7) latches through a slot in collar (6). An air line joins the chamber above diaphragm (5) with the air in the engine inlet manifold.
FUEL RATIO CONTROL CROSS SECTION
1-Lever. 2-Housing. 3-Spring. 4- Spring. 5-Diaphragm. 6- Collar. 7-Bolt assembly.When the operator moves the governor control to increase engine RPM, the governor spring moves collar (6) contacting the head of bolt assembly (7). The bolt assembly restricts the movement of the collar until spring (3) and the turbocharger boost of air pressure in the cover forces diaphragm (5), spring (4) and bolt assembly (7) to relieve the bolt head restriction to collar (6). This will allow the fuel rack to move toward more fuel position as turbocharger air pressure increases with the increase in engine RPM. The characteristics of springs (3) and (4) are such that a balance is maintained between increase of fuel, increase of load, increase of engine RPM and increase of air for combustion in the engine. The system stays in balance to assure minimum smoke and give maximum engine acceleration or load acceptance.Removal and Installation - (Earlier Type Controls Illustrated)
PREPARING TO REMOVE FUEL RATIO CONTROL
1-Wire seal. 2-Bolts (two). 3-Air line.
REMOVING FUEL RATIO CONTROL
4-Fuel ratio control. 5-Bolt. 6-Slot.Unlatch bolt (5) from the slot (6) of collar (hook on earlier governors) in the governor and remove fuel ratio control (4).Install new gasket if necessary. When assembling, move the governor control lever to fuel off position, then latch bolt (5) in the slot (6) and install bolts (2).Install a new wire seal (1) and make certain air line (3) connection will not leak air.Disassembly and Assembly
Remove the fuel ratio control from the governor. See the covering topic.1. Remove