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DISASSEMBLY AND ASSEMBLY

PILOT VALVE

PILOT VALVE 4K2AQ00

Inspection and adjustment

Checking the parts

Part Criteria Action

O-ring — • Replace

Seal — • Replace

Spool • Wear on the sliding surfaces is 10 μm or more than the non-sliding

surfaces.

• Scratches on the sliding surfaces.

• Spool does not move smoothly.

• Replace

Push rod • Tip is worn 1 mm or more

• Scratches on the sliding surfaces

• Replace

Plug • Imperfect sealing due to damage • Repair or replace

Controls • Looseness in the pin, shaft or joint of the controls results in 2 mm

play, or more.

• Wear of the pin, shaft or joint of the controls results in 2 mm play, or

more.

• Tighten to the specified

torque

• Replace

Casing, port

plate

• Scratches, rust, or corrosion at the parts in sliding contact with the

spool.

• Scratches, rust, or corrosion of the part of the seal in contact with the

O-ring

• Replace

• Repair or replace

Takeuchi TB215R Workshop Manual

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