Jackson Hot Water Sanitizing Undercounter Dishmachines JP-24 Technical Manual page 27

Removing the plunger
6. Your repair kit comes with a new plunger. Examine the old
one and ensure that the mating surface is not damaged or cut.
Also inspect the rubber seal on the top of the plunger to
ensure it is in good condition and not torn.
Examining the seal ring on the plunger
Examining the plunger seating surface
SECTION 5: SERVICE PROCEDURES
VACUUM BREAKER REPAIR PARTS KIT (CONTINUED)
JP-24 Technical Manual 7610-002-49-79 Rev. D
Issued: 03-06-2006 Revised: N/A
7. If any of these conditions are present, replace the old
plunger with the new one from your kit. Verify that the new
plunger is also free from defects. If it is not, contact Jackson
immediately.
8. The plunger should drop into the vacuum breaker and seat.
Ensure it is not flipped upside down (the orange seal ring
should be up towards the top of the vacuum breaker).
9. Pick up the cap and examine it. With a soft towel, remove
any grit, grime or debris that may have gotten caught in the
threads of both the cap retainer or the vacuum breaker body.
There is an O-ring that should be present on the cap retainer
as well. Regardless of the condition of the plunger, this O-ring
should be replaced once the cap is removed. Using a small
flathead screwdriver, remove the old O-ring.
Replacing the O-ring
10. With the new O-ring in place, screw the cap back on the
vacuum breaker body. The cap needs to only be hand tight
(snug).
AFTER MAINTENANCE ACTIONS
1. Reconnect the incoming water (if disconnected)
and turn on. Then restore power to the unit. Run the unit for
at least 10 minutes to ensure there are no leaks. If any prob-
lems arise please contact Jackson.
SPECIAL PARTS
Vacuum breaker repair kit:
For 1/2" NPT order 06401-003-06-23
Complete Vacuum Breaker Assembly
Part number 04820-003-06-13 (1/2")
22