MOTOR 3L7038 - Caterpillar

2. Loosen two hose clamps (1) and slide hose off carburetor. Disconnect tube (2) from fitting. 3. Remove two clamps (3). 4. Remove nut and disconnect rod (4) from throttle lever assembly. Remove four bolts (5) that hold carburetor to intake manifold. 5. Remove carburetor (6) from manifold. Remove gasket (7).Install Carburetor
1. Put a new gasket (2) and carburetor (1) in position on the intake manifold. 2. Put coupling (5) in position between nipple (4) and pipe. Install clamps (6).3. Connect rod (3) to the throttle lever assembly. 4. Connect tube (7) to carburetor fitting.Disassemble Carburetor
start by:a) remove carburetor1. Put carburetor in vise for disassembly. 2. Put identification on elbow (2), nipple and carburetor (1) for assembly purposes.3. Remove carburetor (1) from nipple. 4. Remove five screws (4) and cover (3) from carburetor body. 5. Remove spring (5) and diaphragm assembly (6) from carburetor body. 6. Remove four screws from diaphragm assembly. Remove body (7), gasket (8), diaphragm (9) and plate (10). 7. Remove two screws (11) and throttle plate (12). 8. Remove throttle lever (13), lever stop and shaft as a unit. 9. Remove retaining rings (14) and seals (15) from each side of throttle housing. 10. Remove bearing (17) from each side of throttle housing.11. Remove idle mixture screw (18) and spring (16) from housing.Assemble Carburetor
1. Install bearing (1) with tooling (A) to the bottom of the bearing bore in the throttle housing.2. Put seal (2) in position in the seal and retainer counterbore. 3. Install retainer (3) with tooling (A).4. Turn throttle housing over and do Steps 1 through 3. 5. Install spring (5) and idle screw (4). Turn the idle screw four full turns open from the closed position.
Be careful when the throttle shaft is installed not to cause damage to the seals.
6. Install throttle lever (6), lever stop and shaft.7. Put throttle plate (7) in position on the throttle shaft. Install the screws that hold the throttle plate in position finger tight.8. Turn the throttle plate with throttle lever (6) from the fully closed to fully open position to make an alignment of the throttle plate in the center of the bore. Tighten the screws and make sure that the throttle lever turns freely. 9. Install the diaphragm assembly together in the following sequence: body (8), gasket (9), diaphragm (10) and cover (11). Install four screws. 10. Put diaphragm assembly (12) in position on carburetor body. Install spring (13) on diaphragm assembly.11. Turn power mixture adjustment (14) to center position between "R" (rich) and "L" (lean). 12. Put cover (15) in position on carburetor body and install the five screws to hold cover in position. 13. Install carburetor assembly (16) in position on nipple. Make an alignment of the marks on the elbow nipple and carburetor assembly.end by:a) install carburetor