Takeuchi TB215R - Page 281

TROUBLESHOOTING
PILOT VALVE
1
5
PILOT VALVE 5K2AQ00
PILOT VALVE
“4. Disassembly and assembly, Pilot valve”
Symptoms Major causes Remedies
The secondary pressure
is too low
• Primary pressure is insufficient. • Keep the primary pressure.
• The spring is broken or worn out. • Replace
• The clearance between the spool and
the casing is too large.
• Replace the spool and the casing assem-
bly.
• Too much play in the handle. • Disassemble and assemble or replace.
The secondary pressure
is unstable
• The sliding part is not smooth. • Repair or replace.
• The tank line pressure fluctuates. • Remove the faulty part(s) in the tank line.
• Air is present in the piping. • Bleed air by operating the valve several
times.
The secondary pressure
is high
• Pressure in the tank line is high. • Remove the faulty part(s) in the tank line.
• The sliding part is not smooth. • Repair or replace.