CYLINDER GP-HYDRAULIC 2066339 - Caterpillar

Setting the Fuel Screw
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Release the plunger on Tooling (A). Do not move the position of Tooling (A), Tooling (B) or Tooling (C) in the cylinder block.
Use a ring spanner (Box wrench) (14) to retain the locknut of the fuel screw in position.
Use an allen wrench (13) to rotate the allen head screw. Observe the reading on the dial indicator. Adjust the allen head screw until the indicator reads 2.00 0.01 mm (0.0787 0.0004 inch).
Tighten the locknut to a torque of 6 N m (55 lb in) in order to retain the allen head screw in position. The fuel screw is now set.
Ensure that the reading of Tooling (A) is 2.00 0.01 mm (0.0787 0.0004 inch). Final Installation of the New Front Housing
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Remove Tooling (A) and Tooling (B).
Remove Tooling (C).
Remove the fuel injection pump. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove and Install" for the correct procedure.
Remove the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Remove" for the correct procedure.
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Remove Tooling (D). Install original start spring (10).
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Remove Tooling (E) from lever assembly (9).
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Install a new gasket (8). Ensure that the gasket is clean and free from damage.
Install the replacement front housing (7). Refer to Disassembly and Assembly, "Housing (Front) - Install" for the correct procedure.
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Typical example
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Set the Protrusion (X) of the high idle stop screw (4) to the same dimensions as the stop screws on the original front housing.
Set the Protrusion (Y) of the low idle stop screw (5) to the same dimensions as the stop screws on the original front housing.
Release locknut (3). Set the high idle trimmer screw (2) to the fully out position. Turn the screw clockwise for two turns. Tighten locknut (3).
Install the fuel injection pump to the cylinder block. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove and Install" for the correct procedure.
Start the engine and allow the engine to reach normal operating temperature.
Run the engine at low idle and adjust the low idle stop screw (5) to the speed that was previously recorded, prior to the original front end removal.
Run the engine at high idle and adjust the high idle stop screw (4) to the speed that was previously recorded as "Speed B".
Run the engine at high idle and release the locknut (3). Adjust the high idle trimmer screw (2) to the speed that was previously recorded as "Speed A". Tighten the locknut (3). Note: The recorded "Speed A" will be higher than the recorded "Speed B" .
Ensure correct operation of the engine.
Install tamper proof caps (1) to the high idle trimmer screw (2) and the high idle screw (4). Install the tamper proof cap (not shown) to fuel screw (15). Note: Care should be taken when the tamper proof cap is installed to the fuel screw.