14
Sentry Equipment Corp
Disassembly
Disassemble as for cleaning . Remove any sample container adapter, including the O-ring seal within the body port .
Remove all six O-ring seals and inspect for wear, flat spots or cuts and tears . Replace if required .
1.
Test the four plunger seals and rod seal by carefully inserting the plunger through the rear of the body . You should
feel resistance .
2.
Carefully remove the O-rings, examining for flats, cuts or other signs of wear . Clean the seal recesses .
3.
Inspect the O-ring piston seal . If the seal is deformed, scored or has flats worn on the outside diameter, replace it .
4.
Inspect the bore of the air cylinder barrel for scoring or wear . Wipe it clean using an approved solvent, if necessary .
Light score marks can be polished using fine crocus cloth . Be careful not to remove excess metal anywhere . Heavy
score marks that do not easily polish out will render the barrel inoperable, and the barrel should be replaced .
5.
Insert the piston, with the lubricated O-ring seal in place, into the sampler barrel . Hold the piston square . It should
fit airtight . Check by holding your finger over the air fitting port on the barrel while moving the piston back and
forth . A leaking piston seal should be replaced .
Resassembly
1.
Reassemble the four plunger seals, rod seal and piston seal O-rings onto the plunger .
2.
Apply a thin film of the approved dairy lubricant to all six seals . Assemble the spring onto the plunger and insert it
into the sampler body .
3.
Lightly lubricate the inside of the sampler barrel . Slip the barrel over the piston and compress against the body .
Cycle testing at this point is recommended to ensure proper operation .
4.
Replace any bottle or bag adapter after inserting the O-ring seal at the base of the threads in the sampler body .
Cycle testing at this point is recommended to ensure proper operation .
Controller Maintenance
Cleaning
DO NOT subject the sampler controller to direct contact with cleaning solutions or detergents . DO NOT hose it down
or otherwise steam or spray clean water on the controller . Repeated contact with water and/or caustic cleaners may
cause a malfunction . CLEAN GENTLY .
Visual Check – Daily
1.
Check for water in the filter bowl .
2.
With the air pressure on, push the spring valve on the bottom of the bowl to blow out any accumulated moisture .
Visual Check – Weekly
1.
Check air lines for wear, cracks or leakage .
2.
Check mounting bolts and fasteners to ensure they are tight .
3.
Check the controller dial knob and air filter-regulator-solenoid assembly to ensure they are tight .
4.
Check rubber “boot” on the ON/OFF switch . Replace if it is worn or torn .
5.
With the air pressure OFF, unscrew the air filter bowl and remove any accumulated debris .
