SHIM 3207299 - Caterpillar

Mechanical Choke Trim Procedure
The inlet manifold pressure can be adjusted by changing the length of the connecting rod linkage between the choke actuator and the choke plate. Refer to the Specifications Manual for the choke linkage setting specifications.
Set engine operating condition to the rated speed and no load (or minimum load possible).
Loosen the jam nuts on the linkage rod that connects the choke actuator to the choke plate. This connecting rod has LH and RH threads on the opposite ends.
To change the inlet manifold pressure, adjust the length of the linkage rod.Note: Increasing the length of the connection may disengage the connecting rod from the rod end assembly.This process should be done slowly. Pause after every adjustment in order to allow the engine to respond to the change in the inlet manifold pressure.Monitor the following:
inlet manifold pressure
stability of the engine rpm
position of choke actuator
position of wastegate actuator
individual cylinder combustion burn times
individual cylinder exhaust port temperatures
After completion of the choke trim process, tighten the jam nuts on the linkage rod.
Confirm that all the cylinders are firing by checking the combustion burn times for the cylinders (screen "number 14" on the DDT). A combustion burn time greater than 10 ms will indicate that the cylinder is misfiring. Also, check the cylinders for low exhaust port temperatures. If engine stability is unacceptable after properly completing the choke trim procedure, refer to the Testing and Adjusting, "Governor Adjustment Procedure" of this manual.Air Lines (Choke)
Illustration 1 g00476757
(1) Aftercooler inlet line. (2) Choke plate housing. (3) Air inlet from turbocharger. (4) . Choke plate and shaft. (5) Thrust washer. (6) Choke plate lever. (7) Cross shaft lever angle. (8) Choke plate adjusting bolt and locking nut. (9) Choke plate housing bolts. (10) Choke plate mounting bolts. (11) Choke plate rod and rod ends. (12) Cross shaft and levers. (13) Actuator shaft and indicator. (14) Actuator rod and rod ends. (15) Actuator lever angle. (16) Cross shaft bearings.Use the following procedure in order to assemble and adjust the linkage for the air lines (choke).
Assemble the choke plate and shaft (4) , leaving the choke plate mounting bolts (10) loose.
Assemble thrust washer (5) . Tighten the choke plate housing bolts (9) .Tighten the choke plate housing bolts to the following torque. ... 47 9 N m (35 7 lb ft)
Fully close the choke plate and tighten the choke plate mounting bolts (10) .Tighten the choke plate mounting bolts to the following torque. ... 12 3 N m (9 2 lb ft)
Install the choke plate housing (2) . Install the gaskets between the aftercooler housing (1) and the air inlet from turbocharger (3) .
With the choke plate and the housing installed, hold the choke plate in the closed position. Tighten the adjusting bolt (8) until it makes contact with the stop plate.
Tighten the adjusting bolt an additional 90 15 degrees. Tighten the locking nut.Tighten the