AXXIOM Manufacturing, Inc. SCHMIDT, Руководство по эксплуатации и обслуживанию

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© 2013 Axxiom Manufacturing, Inc.
This section lists probable causes of problems that may occur during operation of the abrasive blaster.
Not all of the “probable causes” may apply to your particular abrasive blaster. The probable cause may
not apply because of the control type and accessories on the abrasive blaster. Refer to Figure 11.1 and
the drawings in Section 9.0.
Abrasive blasters are Pressurized Vessels. Propelled objects will cause serious injury or death.
Depressurize vessel before performing any maintenance. See Section 6.2.
11.1 Malfunction With Deadman Lever In The “Off” Position
11.1.1. Blast air stops but abrasive will not shut off
(Thompson Valve blasters only)
(1) Trash stuck between plunger and seat in Thompson Valve® (#14) prevents closing.
(2) Defective valve plunger in Thompson Valve (worn by abrasive or broken).
(3) Defective sleeve in Thompson Valve (worn by abrasive).
(4) Blocked air hose to Thompson Valve (trash blockage or pinched hose).
(5) Defective or broken spring in Thompson Valve (check length of spring).
(6) Thompson Valve cap (or spring retainer) not screwed all the way down (hand tighten only).
11.1.2. Abrasive stops but blast air will not shut off
(Thompson Valve blasters only)
(1) Defective or broken spring in automatic air valve (#9).
(2) Defective seat in automatic air valve.
(3) Blocked signal air hose to automatic air valve.
(4) Defective o-ring in automatic air valve (around shaft).
11.1.3. Both blast air and abrasive will not shut off
(1) Twinline hoses to deadman valve (#12) are crossed.
(2) Non-Schmidt deadman (#12) has been installed.
(3) Control valve (#20) stuck in the “ON” position.
(Thompson Valve blasters only)
(4) Blocked twinline hose.
(5) Defective deadman valve (#12). Pneumatic deadman cartridge plunger stuck in the “ON”
position (down). Cartridge plunger is visible below deadman handle.
(6) Defective or broken Combo Valve (#4) spring. (Thompson/Combo blasters only)
(7) Defective Combo Valve (#4) lower rod guide seal. (Thompson/Combo blasters only)
11.1.4. Blast outlet turns on accidentally
(1) The deadman lever (#12) is worn out.
(2) The safety button on the deadman is missing. See drawings in Section 9.2 and 9.5.
(3) A bleeder type deadman valve has been installed. A bleeder type deadman valve
is not safe
because a particle of dirt from the air hose can plug the bleed hole and cause the blast outlet
to turn on. See
Warnings
and
Rules for Safer Operation
in Section 1.0.
(4) Defective electric deadman switch or electric wiring (check for an electric short).
(5) Defective Combo Valve (#4) lower rod guide seal.
11.0 Troubleshooting