SHROUD 1571019 - Caterpillar

Disassembly Procedure
Start By:
Remove the valve lifter assembly.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g00570449
Mark the exhaust valve lifter (2) and the intake valve lifter (4) for proper installation.
Use a rubber mallet in order to remove the exhaust valve lifter (2), the intake valve lifter (4), and the gas admission valve lifter (3) from the guide (1).
Illustration 2 g00570451
Valve lifter guide springs may be installed on the valve lifters only once. If a valve lifter guide spring is removed from a valve lifter, the valve lifter guide spring must be replaced with a new valve lifter guide spring. If the valve lifter guide spring is not removed from the valve lifter, the valve lifter can be replaced in the original location without replacing the valve lifter guide spring.
Inspect the valve lifter bores in the valve guide (1) for wear. The diameter of the valve lifter bore is 42.000 0.020 mm (1.6535 0.0008 inch). The diameter of the bore of the gas admission valve lifter is 56.070 0.020 mm (2.2075 0.0008 inch).
Ensure that the lubrication passages in the valve lifter guide are not obstructed.
Inspect each lifter body for wear. The diameter of the exhaust valve lifter and the intake valve lifter is 41.91 0.01 mm (1.6500 0.0004 inch). The diameter of the gas admission valve lifter is 27.896 0.013 mm (1.0983 0.0005 inch). The diameter of the gas admission valve lifter bore is 27.950 0.020 mm (1.1000 0.0008 inch).
Illustration 3 g00570452
Exhaust Valve Lifter or Intake Valve Lifter
Illustration 4 g00570473
Exhaust Valve Lifter or Intake Valve Lifter
Illustration 5 g00570474
Gas Admission Valve Lifter
Illustration 6 g00570476
Gas Admission Valve Lifter
Inspect the roller (8) and the roller (13) for damage and looseness on the shaft (7) and the shaft (11).
Press the pin (7) out of the body (6) and the roller (8).
Press the pin (11) out of the body (12) and the roller (13). Note: For the gas admission valve lifter, position the assembly in the press with the wire (15) on the bottom.Note: Place shims (A) between the lifter and the roller when the pin is removed. This is necessary in order to prevent the forks on the lifter from bending. Refer to Illustration 6.
If necessary, remove the spring clips (5).
Illustration 7 g00570477
Remove the O-ring (9) and the insert (10) from the body (6).
Illustration 8 g00570478
If necessary, press the adapter (15) out of the valve guide (1).
Ensure that the lubrication passages in the lifter body (3) are not obstructed.