ENGINE ARRANGEMENT 6N1109 - Caterpillar

ratio controls are awkward to hold during disassembly and assembly. The new FT1820 (Change No. 1) Assembly Fixture is an inexpensive device that can be used to hold the fuel ratio controls. The new FT1820 (Change No. 1) Assembly Fixture is a redesigned (simplified) combination of the former FT1820 (Change No. 0) and FT1821 Fixtures. Dealers in the U.S.A. and Caterpillar Americas can order drawings of Fabricated Tools (FT) from the address that follows. All other dealers can order drawings from their Subsidiary Service Departments.
Caterpillar Tractor Co.
Service G.O. Print Room
Pioneer Park
600 W. Washington Street
East Peoria, IL 61630
Phone: 309-675-0515
Illustration 1. FT1820 Assembly Fixture.Also the 6V9052 and 6V9072 Piston Seal Guides are available to help install the piston assemblies into the fuel ratio control bodies.
Illustration 2. Piston seal guides.Procedure To Use The FT1820 Assembly Fixture
1. Put the FT1820 Assembly Fixture in position in a vise so that the side of the tool (station) to be used is not over the vise jaws.
Illustration 3. FT1820 Assembly Fixture in vise.2. Put the fuel ratio control, that is to be serviced, over the studs on the assembly fixture as shown. Proceed with the disassembly or assembly
Illustration 4. Fuel ratio control on the FT1820 Assembly Fixture.Procedure To Use 6V9052 And 6V9072 Piston Seal Guides
1. The 6V9052 or 6V9072 Piston Seal Guides can be used to help install the piston assembly into the fuel ratio control body. Put the control body in position on the appropriate work station of the FT1820 Assembly Fixture.2. Use engine oil to lubricate the inside of 6V9052 or 6V9072 Piston Seal Guide. Put the guide in position in the control body as shown.
Illustration 5. Position piston seal guide in the control body.3. Use engine oil to lubricate the piston assembly. Put the piston in the piston seal guide and start the bottom of the piston assembly into bottom bore in the control body.
Illustration 6. Installation of the piston assembly.4. After the piston assembly has been started, push it completely into position in the control body with one smooth continuous motion.