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1. Unclamp and remove the sampler from its mounting tee . Remove the gasket .
2. Remove any sample container adapter, including the O-ring seal within the body port .
3. Disconnect the clamp between the sampler body and barrel . The spring will force the plunger and barrel away
from the body .
4. Pull the plunger and spring out of the barrel . Leave the barrel connected to the air line tubing .
5. Remove four plunger seal O-rings from the grooves in the plunger by squeezing the O-ring diameter between
the thumb and finger and rolling the rings out of their grooves . Two front plunger seal O-rings should be
rolled forward, off the plunger . Two back seals can be rolled into the sample collecting ring on the plunger for
convenience during cleaning . Remove the rear rod seal O-ring and piston seal O-ring from the plunger .
6. Spray or brush clean/sanitize the body, plunger, spring, all seals and gasket, as well as any port adapter and its seal,
in approved sanitary procedure .
7. Replace the rod seal and piston O-ring into their grooves . Roll the O-ring plunger seal rings into the grooves on
the plunger . Wipe a light film of approved dairy lubricant onto all six O-ring seals . Add a light film of lubricant on
the inside of the air cylinder barrel .
8. Assemble the spring on the plunger and insert the plunger into the sampler body .
9. Slip the barrel over the plunger piston . Press the barrel against the sampler body to compress the spring . Install
the clamp . Replace any port adapter, including the O-ring seal .
10. Replace the line tee gasket and install the sampler and clamp in place . The sampler body should be horizontal,
with the sample discharge port pointing down .
Weekly Inspection
With the sampler removed from the line, turn the compressed air and sampler controller power on . Between cycles,
the plunger dwells retracted . When a cycle is initiated, the sampler plunger should extend 7/8 in (22mm) from the
sampler body and then retract inside the body . If the seals are completely dry, a sluggish or incomplete stroke may
occur .
Lubrication
Cleaning normally will remove all lubrication . Wipe a thin film of approved dairy lubricant, such as white grease, CIP
lube or Vaseline, onto all seals . Continued short stroke, incomplete cycling or sluggish extension may indicate dirt or
liquid in the barrel, leaks in the air line, or damage to metal parts .
Plunger Seals
Inspect the O-ring seals on the plunger . Replace any that are scuffed, scored or with flats worn on OD . Carefully insert
the plunger through the bore of the body . Seals should move through smoothly, but with light resistance . Little or no
resistance indicates the rings are not properly sealing and should be replaced . The bore of the body where the seals
ride also should be smooth and free of nicks and scratches .
Complete Sampler Disassembly and Maintenance
A complete disassembly, inspection and cleaning of the ISOLOK MSA sampler should be performed as required . Work
on a clean, well-lighted bench area with a copy of the sampler group assembly drawing for reference .
ISOLOK MSA Sampler
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