CYLINDER GP-BULLDOZER LIFT 1U3990 - Caterpillar

Remove And Install Fuel Ratio Control
1. Remove tube (1).2. Remove the two bolts that hold fuel ratio control to the governor. Disconnect the fuel ratio control from the lever in the governor and remove the fuel ratio control (2).3. Remove the O-ring seal from the fuel ratio control. Remove the O-ring seals from the rear governor housing. The following steps are for installation of the fuel ratio control.4. Put the O-ring seals in position on the rear governor housing. Put the O-ring seal in position in the fuel ratio control. Put clean engine oil on the O-ring seals.5. Put fuel ratio control in position on the governor. Make sure the flange on the end of the fuel ratio control is behind the groove (slot) in the lever.6. Install the two bolts that hold the fuel ratio control to the governor.7. Install tube (1). See Testing And Adjusting section for the adjustment of the fuel ratio control.Disassemble Fuel Ratio Control
START BY:a. remove fuel ratio control 1. Remove O-ring seal (1) from the fuel ratio control. 2. Put tooling (A) in a vise as shown so that the station being used is not over the vise jaw. Place the fuel ratio control over the pins in tooling (A). Remove cover (2) and the gasket from fuel ratio control.
There is spring force behind cover (3). Hold cover (3) in position, and slowly remove the bolts that hold it to release the spring force.
3. Remove cover (3) from housing (4). 4. Remove nut (5) and stop (6) from the cover. 5. Remove spring (9), washer (7), and diaphragm (10) from retainer (8). Remove retainer (8) from housing (11). 6. Remove nut (16) from extension (15), and remove the extension from retainer (8). Remove valve (12), spring (13) and O-ring seal (14) from the extension. 7. Remove spring (18), retainer (17) and spring (19) from the housing. 8. Remove piston assembly (20) from the housing. 9. Use tooling (B), and remove snap ring (21) and the wave washers from valve assembly (22). Remove piston assembly (23) from the valve assembly.10. Remove seal (24) from piston (23). 11. If necessary, remove stem (26) from valve (25).12. Clean and inspect all parts. Make a replacement of all parts that are worn or damaged.Assemble Fuel Ratio Control
1. Assemble stem (2) to valve (1) using 9S3265 Retaining Compound. 2. Put seal (4) on piston (3), and put piston (3) on valve assembly (5). 3. Put two wave washers in position on valve (5), and use tooling (A) to install the snap ring on the valve assembly. 4. Place housing (7) on tooling (B), and put tooling (C) into the bore of the housing. Lubricate tooling (C) with clean engine oil.5. Put a small amount of clean oil on the seal of the piston assembly, and push piston assembly (6) into position with a smooth swift motion. 6. Place spring (8) and retainer and spring (9) in position in housing (7). 7. Put O-ring seal (12) on extension