4.1.9 Guide Tube (if applicable)
Figure 4-11 Guide Tube
4.1.9.1 This guide tube is principally a structural part. There should be no paint on the inside of the
guide tube. The area of discharge through the guide tube (Figure 4-11) must be
unobstructed by foreign matter that would hinder free flow of discharging fluid. Inspect the
guide tube by moving the top guide up and down the length of the guide tube as indicated
below. If it binds, look for dents or gouged surfaces on the inside of the guide tube. Repair
the damage to allow free movement of the spring guide.
WARNING: Valve Sticking. If the spring guide binds in the guide tube (nozzle), the
valve may stick in the open position or be prevented from opening. Always ensure
free travel of the spring guide before reassembling the valve.
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