TUBE AS 2159957 - Caterpillar

Removal Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g01057823
Loosen clamp (2). Remove the clamp and tube (3).
Loosen clamps (4). Remove both breathers (1) as a unit.
Illustration 2 g01057824
Remove O-ring seals (5) from the valve covers. Discard the O-ring seals.
Illustration 3 g01057825
Remove clamps (6). Remove both breathers (1) from tee assembly (7). Inspect the tee assembly for cracks. If the tee assembly is cracked, discard the old tee assembly and obtain a new tee assembly for installation.
Turn the breathers upside-down in order to inspect the condition of the breather elements. Clean the breather elements with clean, nonflammable solvent. If the breather elements remain contaminated after the cleaning, discard the breathers and obtain new breathers. Do not attempt to disassemble the breathers.Allow the breather elements to dry before installation.Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 4 g01057825Note: Coat the rubber parts with clean engine oil or petroleum jelly in order to make installation easier.
Place clamps (6) over the parts of tee assembly (7) that will receive breathers (1). Install breathers (1) into the tee assembly. Tighten the clamps to a torque of 3.0 0.5 N m (27 4 lb in).
Illustration 5 g01057824
Coat new O-ring seals (5) with clean engine oil. Place the O-ring seals on the valve covers.
Illustration 6 g01057823
Place clamps (4) around the parts of the breathers that will be attached to the valve covers. Install both breathers (1) as a unit. Tighten the clamps.
Place clamp (2) on the part of the tee assembly that will receive tube (3). Install the tube. Tighten the clamp to a torque of 3.0 0.5 N m (27 4 lb in).