Takeuchi TB215R Workshop Manual page 166

Inspection and adjustment
Checking the parts
Part
O-ring
Seal
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.
Push rod • Tip is worn 1 mm or more
• Scratches on the sliding surfaces
Plug • Imperfect sealing due to damage
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.
Casing, port • Scratches, rust, or corrosion at the parts in sliding contact with the
plate spool.
• Scratches, rust, or corrosion of the part of the seal in contact with the
O-ring
PILOT VALVE
Criteria
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7
DISASSEMBLY AND ASSEMBLY
PILOT VALVE
Action
• Replace
• Replace
• Replace
• Replace
• Replace
• Replace
• Replace
• Repair or replace
• Tighten to the specified
torque
• Replace
• Replace
• Repair or replace
4
4K2AQ00