Maintenance
4
Pump P-960
User Manual 18-1172-73 Edition AA
23
4.6.2
Removing the check valves
If the condition of the check valve is not improved by cleaning, remove
it as follows:
1
Remove the connection part according to section 4.4.2 Removing
the connection part.
2
The check valves in the
connection part are locked in
position with banjo fittings.
Remove the check valves using
the screwdriver.
4.6.3
Cleaning the check valves
1
Immerse the check valves in 100% ethanol and place in an
ultasonic bath for 5–10 minutes.
2
Repeat the ultrasonic bath with distilled water.
4.6.4
Replacing the check valve O-rings
Liquid appearing at a banjo fitting might
indicate that a check valve O-ring is damaged.
It might also cause reduced flow or pressure
fluctuation.
Carefully replace both old O-rings on the check valve with new ones if
you suspect that an O-ring is damaged.
Check valve
O-ring
18117273aa.book Page 23 Thursday, July 3, 2003 5:13 PM