MicroBlaster MB1006
Section 5: Trouble-Shooting and Repair
Comco Inc.
5-15
Issue Date: September 2003
Tank Cover
The tank cover seals the abrasive tank and allows for replenishing the abrasive powder
by filling through
the “quick access” flapper valve.
Always fill the tank through the
Powder Quick Fill hole and refrain from removing the tank cover unless absolutely
necessary.
The tank cover should be well maintained to ensure a good seal. Inspect
the tank cover regularly for worn O-rings and threads, or pitting due to abrasive leakage.
See Section 4 for procedures to check the tank cover threads with the thread gage
provided in the accessory kit. If the tank cover threads become worn, replace it with
Comco p/n MB1568.
Tank Cover Assembly
The Tank Cover Assembly is made of three main components: the Tank Cover, Clutch
Plate, and Flapper Assembly. The Clutch Plate is designed to float inside the top of the
Tank Cover, which allows it to move independently from the cover. As the cover is
tightened onto the tank, an O-ring on the clutch meets the top of the tank, creates a seal,
and causes the Clutch Plate to stop turning. This action prevents the O-ring from
undergoing unnecessary twisting, thereby increasing the life of the O-ring.
In order to prevent premature O-ring wear, the Clutch Plate must float freely inside the
cover. If the Clutch Plate does not move freely, the cause may be a build up of abrasive
powder between the plate and the cover, which can be cleaned out with compressed air.
If, after cleaning, the Clutch Plate fails to turn freely, the complete MB1568 Tank Cover
Assembly must be replaced. The Tank Cover and Clutch Plate are assembled at the
factory and cannot be disassembled for service.
Tank Cover Flapper Valve
The flapper valve allows for quick filling of the abrasive tank. If the valve becomes worn
or damaged, replace it with Comco part number MB1145.
Tank Cover Flapper Valve Replacement Procedure (MB1145)
1.
Turn Power OFF.
2.
Unscrew the tank cover and remove.
3.
Using a 3/32” Allen wrench, remove the flapper valve. Replace the O-ring
if necessary; see procedure below.
4.
Install the new flapper valve (MB1145).
5.
Install the tank cover.
Summary of Contents for MicroBlaster MB1006
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