Cleaning Components; Installing The Plunger; Installing The Isolator - Microfluidics Microfluidizer LM20 User Manual

NOTE: If great difficulty is experienced trying to remove the snap retaining ring, it may be
necessary to remove the hydraulic extension adapter first. If so, follow steps 6 through
8.
7. To remove the hydraulic cylinder extension adapter from the hydraulic cylinder, apply localized
heat to approximately 250ºC on the extension adapter. The heat will loosen Loctite that is on the
extension adapter threads.
!
"WARNING": HOT SURFACES. Remove extension adapter while it is hot. Wear proper personal
protection.
8. Clean the threads of the hydraulic cylinder removing any Loctite debris.
9. Follow steps 4 and 5.

4.1.5 Cleaning Components

1. All the components just removed must be thoroughly cleaned. Each component should be rinsed
in water or a suitable cleaner. A clean damp rag should wipe the components clean of any product,
debris or lubricating agents. Particular care must be taken to thoroughly clean all threaded parts.
Any debris on the threads will damage the components during assembly. It is recommended that
if compatible, isopropyl alcohol be used. Obtain clean rags and dampen the rags with the alcohol
and again clean all the components just removed. It is suggested that Q-tips be used for hard to
reach areas. The components should be wiped clean to a spotless appearance. The threaded
components must be kept clean. This strict cleaning procedure must be followed each time the
plunger seal is replaced. Failure to properly clean the components will result in premature failure
of seals, O-rings and cause damage to machined parts.
2. Inspect all the components. Look for any excessive scratches or wear marks. If damage is found
the components must be replaced. Contact the Customer Service Department.

4.1.6 Installing the Plunger

1. Install the plunger with O-ring into the hydraulic cylinder extension. Lubricate the plunger O-ring
as well as all the O-rings with tri clover spray or an equivalent lubricant. Insert the washer. Insert
the snap ring using the snap ring pliers. Insert the tips of the pliers into the snap ring holes and
squeeze the pliers. Push the snap ring into its groove as you squeeze the pliers. Installation may
be helped by squeezing the pliers with one hand and using the tip end of a flat head screw driver
with the other hand to press the snap ring in place. Make sure the snap ring is locked into its
groove and the plunger is properly attached before proceeding.
2. Lubricate the plunger with tri clover spray or an equivalent lubricant.

4.1.7 Installing the Isolator

1. Mount the Isolator by first lubricating the 1.5" diameter opening at the base with tri clover spray
or an equivalent lubricant. Obtain the four 3/8" hex bolts and lubricate them with Never-Seez.
Then attach the isolator to the hydraulic cylinder using the four 3/8" hex bolts. (The cover plate
MANUAL.LM20 Revision C January 2023 Page 25 of 52