PUMP GP-GOV & FUEL INJ 6N6268 - Caterpillar

1100, 3100 And 3200 Series EnginesSUPPLEMENT: 04/29/85SERVICE MAGAZINE, JULY 16, 1984, PAGE 6.In the article "FT1886 Valve Spring Compressor Group Available," put a mark through Step 3. Make reference to the new Step 3 which follows. Turn the crankshaft until the piston, of the cylinder where the valve springs are to be replaced, is at TDC. See the appropriate Service Manual.
--------------- END SUPPLEMENT ---------------Some installations of the above engines have limited clearances. The limited clearances can present problems when replacing the valve springs. The FT1886 Valve Spring Compressor Group is designed to make valve spring replacement faster and easier in applications where clearances are limited. The Valve Spring Replacement Procedure shows how to use the FT1886 Valve Spring Compressor Group.
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
Valve Spring Replacement Procedure
FT1886 Valve Spring Compressor Group5S1322 Valve Keeper Inserter8S2293 Magnet Assembly1. Remove the valve covers and the rocker shaft assemblies. See the appropriate Service Manual Module.2. Remove the fuel injection nozzle clamp assemblies that hold the fuel injection nozzles in the cylinder heads. See Illustration 2.
Illustration 1. FT1886 Valve Spring Compressor Group.
Illustration 2. Remove fuel nozzle clamps and install the threaded rod from the FT1886 Valve Spring Compressor Group.3. Turn the crankshaft until the cylinder where the valve springs are to be replaced, is at TDC. These cylinders are together at TDC at the same time: 1 and 4, 2 and 5, 3 and 8, 6 and 7.
Do not turn the crankshaft when the locks are removed from the valves. This could allow the valves to fall into the cylinder and make it necessary to remove the cylinder head.
4. Install the threaded rod, part of FT1886 Valve Spring Compressor Group, in the hole where the nozzle clamp assemblies were removed. Make sure the threaded rod is tightened in the hole.5. Put the plate in position on the threaded rod and align it with the valve springs as shown. Install the nut on the threaded rod. Tighten the nut to compress the valve springs. See Illustration 3.
Illustration 3. Install plate and nut from the FT1886 Valve Spring Compressor Group.6. Use the 8S2293 Magnet Assembly to remove the locks from the valve stems. See Illustration 4.
Use a 4 mm open end wrench on the flats of the threaded rod to keep the rod from turning when the nut is loosened. Failure to do this could allow the threaded rod to come out of the nozzle clamp hole and be thrown by the valve spring tension. This could result in serious personal injury.
Illustration 4. Lock removal.7. Use a 4 mm open end wrench on the flats of the threaded rod to keep the rod from turning and turn the nut on the threaded rod counterclockwise until the tension is off the valve springs. Remove the nut and plate.