5-3
Maintenance
INSTRUMENT INTERIOR AND EXTERIOR
• Clean the instrument exterior surfaces by wiping with a damp
cloth or washing with Beckman Solution 555™ (339555). Dilute
the detergent 10 to 1 with water. Do not use acetone or other
solvents.
• To prevent accumulations of sample, dust, oil, dirt, or other foreign
matter, regularly wipe the channel of the stator, the air jets, and the
brake pin with isopropyl alcohol.*
STATOR ASSEMBLY
Clean the stator assembly when the filter element is replaced, or if the
rotor runs erratically.
!
WARNING
Disconnect the power cord and the air supply.
1. Disconnect the air supply at the rear of the instrument by pulling
back the quick-disconnect hose sleeve. The hose may be discon-
nected while it is under pressure, but be careful not to damage
surrounding objects.
2. Remove the stator pad and the brake pin. (Lift the pin out with a
forceps.)
3. Unscrew the two stator screws, then pry the stator off, using the
tools supplied. See Figures 5-1 and 5-2. Note that the slots on the
stator outside rim are used to provide a leverage point for the
stator tools.
4. Remove the three stator O-rings, shown in Figure 5-3. Use a
pointed wooden or plastic tool to avoid scratching the stator.
5. Clean the stator, including the air jets and shaft, with acetone.*
6. Lightly coat the O-rings with silicone vacuum grease (335148)
and reposition them.
* Flammability hazard. Do not use in or near operating ultracentrifuges.
