ENGINE AR 6I2224 - Caterpillar

Ensure that the valve spring is compressed squarely or damage to the valve stem may occur.
Use tool (A) to compress valve spring (3). Remove valve keepers (1).Note: For four cylinder engines, if all valve springs require replacement the procedure can be carried out on two cylinders at the same time. The procedure can be carried out on the following pairs of cylinders. 1 with 4 and 2 with 3. Ensure that all the valve springs are installed before changing from one pair of cylinders to another pair of cylinders.
Do not turn the crankshaft while the valve springs are removed.
Apply sufficient pressure to Tooling (A) to allow removal of the valve keepers (1).Note: Do not compress the spring so that the valve spring retainer (2) touches the valve stem seal.Remove valve keepers (1).
Slowly release the pressure on Tooling (A).
Remove valve spring retainer (2) and remove valve spring (3).
Remove Tooling (A) and (B).Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
A 9U-6195 Valve Spring Compressor 1
B(1) 268-1969 Adapter 1
B(2) 9U-6194 Adapter 1
(1) C1.1 engine
(2) C1.5 and C2.2 engines
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Do not turn the crankshaft while the valve springs are removed.
Plug the apertures for the push rods in the cylinder head in order to prevent the entry of loose parts into the engine.
Install suitable plugs to the inlet ports of the cylinder head in order to prevent the entry of loose parts into the engine.
Inspect the valve springs for the correct length. Refer to Specifications, "Cylinder Head Valves".
Illustration 2 g01304583
Typical example
Install valve spring (3) onto the cylinder head. Position valve spring retainer (2) onto valve spring (3).
Improper assembly of parts that are spring loaded can cause bodily injury.To prevent possible injury, follow the established assembly procedure and wear protective equipment.
Ensure that the valve spring is compressed squarely or damage to the valve stem may occur.
Install Tooling (A) and (B) in the appropriate position on the cylinder head to compress the valve spring.
Apply sufficient pressure to Tooling (A) to install valve keepers (1).Note: Do not compress the spring so that valve spring retainer (2) touches the valve stem seal.Install the valve spring keepers.
Carefully release the pressure on Tooling (A).Note: Ensure that the valve keepers are correctly seated.
The valve spring keepers can be thrown from the valve when the valve spring compressor is released. Ensure that the valve spring keepers are properly installed on the valve stem. To help prevent personal injury, keep away from the front of the valve spring keepers and valve springs during the installation of the valves.
Remove Tooling (A). Ensure that all the valves are secured in place by a valve spring and valve keepers. Rotate the crankshaft through about 45 degrees to clear the piston from the valve. Lightly strike the top of the valve with a soft hammer to ensure that the valve keepers are properly installed.End By:
Install the rocker shaft assembly. Refer to Disassembly and Assembly, "Rocker Shaft and Pushrod - Install".