Item# Stock# Description
290041 12” Lid
290041-S 12” Screen
1 290044 18” LID
2 290044-S 18” Screen
290046 24” LID
290046-S 24” SCREEN
1
2
Lids & Screens
Trouble Shooting -
Operational Related Issues
DANGER: Never attempt to open the Abrasive Blaster in any way while it is pressurized. Use extreme
caution when performing troubleshooting procedures that involve pressurizing the Abrasive Blaster. Trouble
shooting procedures are to be performed by experienced personnel only
MBM-Series Owner’s Manual
30
Copyright© 2015 Mod-U-Blast®, All Rights Reserved
PROBLEM CAUSE
Blast pot turns on accidentally
or without warning
1. Deadman Lever safety flap, or lock button damaged or missing
2. The pneumatic Deadman Lever is defective
3. The electric Deadman Lever is defective
4. The electric control cord is damaged, defective or worn out
5. The ‘O’ ring on the shaft of the auto air valve is defective or worn out
Blast pot will not turn off when
Deadman Lever is released
1. The pneumatic Deadman Lever is damaged or defective
2. The electric Deadman Lever is damaged or defective
3. The electric control cord is damaged or shorted at connectors
4. The solenoid valve is stuck open
5. The muffler on the solenoid is clogged not allowing it to exhaust
Blast pot media stops but Air
blast won’t shut off when Dead-
man Lever is released
1. Auto air valve seat is defective or worn out
2. Auto air valve disc is defective or worn out
3. The ‘O’ ring on the shaft of the auto air valve is defective or worn out
4. Auto air valve spring is damaged or defective
BLAST POTS WITH APV METERING VALES ONLY
Blast pot air blast stops but
media keeps flowing when Dead-
man Lever is released
1. Urethane Seat in the APV is damaged, defective or worn
2. Urethane Sleeve in the APV is damaged, defective or worn
3. The plunger in the APV is damaged, defective or worn
4. Foreign material is stuck between the plunger and the seat in the APV
5. The APV spring is damaged, defective or worn out.
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