Use and Care Manual

40402 & 40403 Assembly Instructions
Page 6
MAINTENANCE
Check siphon gun nozzle and air jet for wear when replacing. Proper
matching of nozzle and air jet is very important for effective blasting.
Match size or color small/small (gold), medium/medium (silver) and
large/large (black). Replace media when worn or excessive dusting
occurs. Check and clean dust collector and filter frequently.
WARNING!
The threads on the nozzle holder and set screws must be inspected each time the nozzle is
secured to the holder. Check the threads for wear, and make sure nozzle set screw securely
grips the nozzle. The nozzle washer must also be inspected for wear. Worn nozzle washers
cause erosion. A loose-fitting nozzle may eject from the holder under pressure and could
cause severe injury.
WARNING!
Failure to observe the following before performing any maintenance could cause serious
injury or death from the sudden release of compressed air:
 Disconnect power supply.
 Lockout and tagout the compressed air supply.
 Bleed the air supply line to the blast gun.
Immediate replacement of worn components is required. Failure to replace worn components
could expose the operator or bystanders to high speed media and compressed air could
cause death or serious injury.
Leaks around couplings and nozzle holders indicate worn or loose fitting parts. Nozzle
holders and couplings that do not fit tightly on hose and nozzles that do not fit tightly in
nozzle holders could disconnect while under pressure. Impact from nozzles, couplings,
hoses, or abrasive, and parts disconnected while under pressure could cause severe injury.