Pump Piston Shell
Turn shell off pump piston
to decrease number of
fast operations. Turn
shell onto pump piston to
increase number of fast
operations.
Figure 24 . Pump piston shell adjustment
D. Continue to test and adjust the pump piston shell
until the proper number of fast trip operations
are being performed, then stake piston shell to
prevent movement.
otee:
N
If adjustment of the pump piston shell will not
provide proper operation, the piston shell may
be worn, replace shell and repeat test and
adjustment procedure.
Trip linkage adjustment
After the pump piston has been adjusted to perform the
correct number of fast operations, the trip linkage must be
adjusted so the recloser will operate the correct number of
times to lockout.
Adjustment of the trip linkage is a trial-and-error procedure
that must be done with a suitable tester. The tester should
be adjusted to provide a minimum of four-times the
continuous current coil rating of the recloser being tested.
Use the following test procedure to perform the trip linkage
adjustment (refer to
Reference R280-90-2 Low Voltage AC
Testing of Hydraulic Reclosers
for additional information):
1. Move the yellow manual operating handle to the
CLOSED position and wait at least three minutes for
trip piston to fully reset.
2. Operate tester (per manufacturer’s directions) to apply
the required current through the recloser. Note the
number of operations to lockout.
3. The number of operations should match the data
plate specifications. If the number of operations does
not match, check to see if the recloser is correctly
configured. If configuration is correct, adjust trip linkage.
A. If recloser is performing too many operations,
turn self-locking nuts off the trip linkage
(counterclockwise) a little, see Figure 25.
Repeat test.
B. If recloser is performing too few operations, turn
self-locking nuts onto the trip linkage (clockwise)
a little (onto the pump piston) see Figure 25.
Repeat test.
Operating
mechanism
lever
Self-locking
nuts
Figure 25 . Trip linkage adjustment
otee:
N
Be sure to maintain free play between the trip
transfer lever and the two self-locking nuts. Ideally
loosen one nut one-half turn, to maintain proper free
play, any time the assembly becomes tight.
WARNING
Equipment misoperation . The two self-locking nuts
must not be adjusted tightly against trip transfer lever .
If nuts are tight, movement of trip transfer lever will
be prevented; as a result, recloser may fail to lockout .
Failure to lock out can cause death, severe personal
injury, and equipment damage .
T237 .1
Types V4L and V4E single-phase maintenance instructions
17
MAINTENANCE INSTRUCTIONS
MN280055EN May 2017
