MAINTENANCE OF UPPER AND LOWER MAIN CASE ASSEMBLY - (Cont)
Remove plug cock (8) and input gear A (7).
Remove bushings (9) by using an appropriate punch to drive the bearing out. Discard old bearing.
Remove bearing (10) by using a 1/4-20 bottoming tap. Tap through bearing. When tap reaches bottom
bearing (10) will begin to back out. Discard old bearing.
Remove bearing (11) by using a 5/16-18 bottoming tap. Tap through bearing. When the tap reaches bottom
the bearing (11) will begin to back out. Discard old bearing.
Remove bearing (1, Figure 5-8) and bearing (2) by using a 5/16-18 bottoming tap. Tap through the bearing
when the tap reaches bottom the bearing will start to back out. Discard old bearing.
Remove bushing (4) by using an appropriate punch to drive bushing out.
Remove locking nut (5), packing gland (6), and gasket (7).
Disassemble R-valve assembly.
Compress spring (1, Figure 5-9) remove pin (4) and spring (1).
Protect cylinder with soft cloth when removing from body.
Unscrew cylinder (2) from body (7).
Remove preformed packing (6) and piston (5) by pushing down on piston stem.
Clean all components.
Inspect arm retainer for flat areas, ensure ball pivot moves freely on arm. Replace arm retainer if necessary.
Inspect spring for damage. Replace if necessary.
Inspect cam bearing on arm for free movement.
Apply grease to arm retainer and ball pivot.
Inspect the gears, shafts, and bushings for wear. Replace gears when gear teeth are worn thin or to a sharp
Inspect for stripped gear teeth. Replace all shafts, bushings, and gears if gear teeth are stripped.
Lubricate the gearbox.