Routine Maintenance
8-1
Section 8: Routine Maintenance
8.1 Introduction
This section contains basic, essential maintenance information. For more detailed
information, contact Cryomech.
8.2 Maintenance schedule
Maintenance Frequency Comment
Replace adsorber Every 20,000 hours See Section 8.4
Vent helium gas As required See Section 8.5
Charge helium gas As required See Section 8.6
Clean air filters
(air cooled only)
As required Washable filters
8.3 Reliquefier/Cold head
CAUTION
The helium reliquefier contains no user-serviceable parts. Attempting to disassemble
the helium reliquefier will void the warranty.
CONTACT CRYOMECH IF THE HELIUM RELIQUEFIER NEEDS TO BE
RETURNED FOR SERVICING.
8.4 Replace the adsorber
Required tools:
Quantity Description Comment
1 1” Open end wrench
For Aeroquip coupling
1 1-1/8” Open end wrench
For Aeroquip coupling
1 1-3/16" Open end wrench
For Aeroquip coupling
1 1-3/8" Open end wrench
For Aeroquip coupling
1 1-5/8" Open end wrench
For Aeroquip coupling
1 Slotted screwdriver For hose clamp
1 Phillips head screwdriver For side panel of compressor
CAUTION
At no time should the Aeroquip couplings be removed from the adsorber when
replacing the adsorber. Replacement can be completed without relieving system
pressure since the adsorber is equipped with Aeroquip couplings for sealed
removal.
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