Ames Fire & Waterworks LFC500, LFC500N, LFC500Z Lead Free Stainless Steel Reduced Pressure Detector Assemblies - Manual (Page 4)

4
Material/Tool Requirements:
• #4 Phillips screwdriver or 3 /
8
” diameter rod, length sufficient to
span diameter of check, see Figures A and B.
• 1 /
2
– 13 x 5 fully threaded hex bolt (Service bolt).
• 3 /
4
” open end or socket wrench.
Instructions:
Prior to servicing any Ames valve, it is mandatory to shut down
the water system by closing both the inlet and outlet shutoff
valves. After shutoff valves are closed, open test cock #2, #3
and #4 to relieve pressure within the backflow assembly.
1. After #3 test cock has been opened to relieve pressure,
remove #3 test cock from housing. When repairing an 8” or
10” (200 – 250mm) device, remove both Victaulic couplers
from body. Slide the downstream Victaulic coupler gasket to
the downstream side of the housing. The upstream Victaulic
coupler gasket stays in place.
2. Remove check(s) to be maintenanced.
3. Locate the service hole and thread in the service bolt by hand
until it contacts the linkage. (Figure A)
4. Continue to thread in service bolt with the wrench until the ser-
vice hole in the linkage is aligned with the service notches on the
spring arbors. (Figure A)
5. Insert the Phillips screwdriver through the arbors and service
hole of the linkage making sure that the tip of the screwdriver
extends past the ends of the arbors by a minimum of
1 /
4
”
(6mm). (Figure B)
6. Back out the service bolt until load is transferred to the screw-
driver. Continue to back out the service bolt until sufficient clear-
ance is achieved to remove the complete spring mechanism.
7. To disconnect linkage, remove retaining clip and pin (store in
a safe location
for reinstallation).
8. To remove spring mechanism, grasp the screwdriver at the cen-
ter, pull complete
assembly straight out and store in a safe place.
9. Reinstall in reverse.
WARNING !
While the spring mechanism is removed for check servicing; never
pull the screwdriver out or off the support notches on the arbors.
Doing so may cause bodily injuries.
Maintenance Instructions 8” – 10” (200 – 250mm)
Figure A
Figure B
Service Hole