TUBE ASSEM. 5K2479 - Caterpillar

Illustration 41 g06304315
Drying the threads
Use compressed air to dry the threads.
Illustration 42 g06304318
Applying thread lock to the pin
If the special pin is used, apply 9S-3263 Thread Lock Compound to the threads.
If a pipe plug is used, apply 154-9731 Thread Lock Compound to the threads.
Illustration 43 g06304319
Pin installed in tapped hole
Illustration 44 g06304320
Tighten the pin
Illustration 45 g06304321
Installed pin (head separated)
Install the plug or the pin.
If a pin is used, then tighten the pin until the pin head separates from the pin body.
If a plug is used, then tighten the plug to the torque found in chart A.
Table 28
Chart A
Torque for Pipe Plugs
Pipe Thread Size Recommended Torque
1/16 10 N m (7 lb ft)
1/8 16 N m (12 lb ft)
1/4 20 N m (15 lb ft)
3/8 35 N m (26 lb ft)
1/2 45 N m (33 lb ft)
3/4 60 N m (44 lb ft)
1 75 N m (55 lb ft)
Illustration 46 g06304323
Grinding the pin flush
Illustration 47 g06304324
Example of pin ground flush
Grind off the pin or the plug until flush with the casting surface.
Illustration 48 g06304326
Pin peening the area
Illustration 49 g06304327
Example of pin peened area
Use a suitable tool to pin peen the repaired area, to help relieve stresses and aid in sealing.
Illustration 50 g06304328
Pin extending into the cylinder block
Check to ensure that the amount of the pin or the plug that extends into the cylinder block will not interfere with the rotating components of the engine.Test Procedure
After a repair is complete, a test should be performed to make sure that there is good seal. The two acceptable testing methods are listed below.Soap and Water
Apply air pressure to the inside of the repaired area. Put a soap and water solution on the opposite side. Soap bubbles will appear if the repaired area has a leak.Dye Penetrant
Repaired areas should be tested by applying dye penetrant to one side of the repair. The penetrant will soak through if a leak exists.
Illustration 51 g06304329
Completed repair
After the testing is completed, the repaired area can be cleaned and painted to give a nearly invisible repair, as shown in Illustration 51Reinstall the components that were removed to perform the repair.