D349 INDUSTRIAL & MARINE ENGINES Caterpillar


Fuel Ratio Control

Usage:

Remove Fuel Ratio Control With Override

1. Remove the three override assembly mounting bolts (3).

2. Remove the override assembly (2).

3. Remove the fuel ratio control sensing line (1).

4. Remove the two fuel ratio control mounting bolts. Slide the fuel ratio control toward the front of engine and remove it from governor.

Install Fuel Ratio Control With Override

1. Position the fuel ratio control on the governor. Make sure the bolt (1) engages the slot in rack stop collar (2). Install the two mounting bolts.

2. Install the fuel ratio control sensing line.

3. Install the override assembly and mounting bolts.

4. Adjust the fuel ratio control. See FUEL RATIO CONTROL SETTING in TESTING AND ADJUSTING.

Disassemble Fuel Ratio Control With Override

preparatory step:

a) remove fuel ratio control with override

1. Remove the cover (1), spring (2) and plunger (3) from override housing (4).

2. Remove the lever assembly retaining nut and screw from the override housing. Remove the lever assembly and spring. Remove the seal from housing.

3. Remove the cover (5) from the fuel ratio control housing assembly. Remove the two springs. Turn bolt (6) and separate the washer, diaphragm, retainer assembly and bolt.

Assemble Fuel Ratio Control With Override

1. Connect the bolt to the washer, diaphragm and retainer assembly. Position the diaphragm assembly and the two springs in housing assembly. Install the fuel ratio control cover.

2. Install the seal in override housing with lip of seal toward arm. Install the lever assembly and spring. Install the retaining nut and screw.

3. Install the plunger, spring and cover on override housing.

NOTE: See the TESTING AND ADJUSTING for adjustment procedure during assembly.

concluding step:

a) install fuel ratio control with override

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