Chapter 4: Maintenance
4-LV-1-4 12/28/2010 LV1 User Manual 4-9
the set screws that fasten the piston can be accessed as in the Removing the Liquid End
Body section of this chapter.
2. With the piston slightly pulled out of the bore of the liquid end, take the liquid end body
with o-ring (15) and the 2.75" diameter locknut attached and carefully rotate the liquid
end body in a clockwise direction into the isolator. Be careful not to cross thread the
components. If resistance is felt, unscrew the liquid end body and inspect its threads and
the isolator threads for debris or burrs. The liquid end body should rotate smoothly.
3. Screw the liquid end body into the isolator until it bottoms out.
4. Locate any of the access holes on the isolator, and by using two ¼” flat blade
screwdrivers, "pinch to rotate" the hydraulic cylinder extender (20) so that each of the two
set screw threads are exposed to be accessed.
5. Apply Never-Seez grease to the tip of a 3/32" hex key. Insert each of the set screws (24)
onto the hex key tip such that the grease will prevent the screws from falling off during
the fastening process.
6. Apply Loctite 242 (removable) to each of the screw threads.
7. Screw each set screw into the extender and torque to 25 in-lb. This will establish a
connection between the piston (1) and the hydraulic cylinder extender (20).
8. Back off the liquid end body approximately 1/8 turn so that its inlet opening is to the
machine left (human right if facing the machine).
9. Rotate the 2.75” diameter locknut by hand until it is snug against the isolator.
10. Obtain the black spanner wrench (MFIC Inv. No. 16.2102) and wrap it around the 2.75"
diameter locknut. Make sure the wrench tooth is inserted into one of the locknut grooves.
The spanner wrench handle should be to the right of the isolator. Strike the end of the
spanner wrench handle with a rubber head mallet. Two or three strikes may be required to
tighten the locknut. When the locknut cannot rotate any farther, it is tight.
11. Re-attach the process piping beneath the liquid end body:
a. Attach the check valve assembly tightening to 20 ft-lbs(see section C-C on Drawing
#801.00429 on the CD).
b. Attach the reservoir/syringe.
c. Attach the chamber assembly.
12. Obtain the reservoir and re-attach it to the check valve body using the relevant luer tube.
13. Re-attach any liquid quench tubing, if applicable.
14. Make sure all process tubing, the liquid end body, and reservoir have tight and proper
connections.
15. Reconnect the power source.
16. Close the priming valve.
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