Should you experience operating
difficulties, here are some tips that
may apply to your application. For
further assistance, please record the
date code, the serial number on the
elbow, and the pressure at the gun,
and call your Rain Bird Dealer or the
toll free Rain Bird number listed at the
back of this guide.
Rain Gun does not rotate
or rotation speed is too slow
• Install a 1/4" pressure gauge into
the Rain Gun pressure port and
verify adequate operating pressure.
Refer to Spoon Bracket Adjustment
guide (table 2) for proper
configuration of spoon bracket
based on nozzle size. Also check
the spoon and the arm for damage.
• If pressure is below specification
and the Rain Gun is properly
configured, decrease the nozzle
size to increase pressure at the gun.
• If pressure is lower than it was at
installation, check for obstructions
in the water line. You may be able
to flush obstructions from the
sprinkler and water line by
removing the nozzle and turning
on the water.
• If pressure is still low after
removing obstructions, and your
Rain Gun still does not rotate, you
may need to add a booster pump or
increase pressure in another way.
Rotation speed too fast
Install a pressure gauge at the Rain
Gun pressure port and refer to Spoon
Bracket Adjustment guide (table 2) for
proper configuration of spoon bracket
to nozzle size. Also check the spoon
for damage. For proper operation, the
operating pressure at the gun should
not exceed 100 psi.
Rotation speed varies from
one direction to another
• Check that the spoon is properly
installed on the arm.
• Check that the arm is not bent.
• Check that the nozzle is properly
installed in the nozzle housing.
It should be seated squarely.
• Check the condition of the spoon.
If broken, it will need to be
replaced.
Gun does not reverse
• Install a pressure gauge at the Rain
Gun pressure port and refer to
Spoon Bracket Adjustment guide
(Table 2) for proper configuration
of spoon bracket to nozzle size.
Pressure at gun should not exceed
100 psi.
• Check trip mechanism by manually
operating it. Operation should be
free and smooth.
• Check trip mechanism spring. It
must have tension and be properly
installed.
• Check bushings at the trip
mechanism. They must be clean
and not damaged.
Arm stroke frequency is
too high
• Make sure pressure is not above
100 psi.
• Make sure the front arm
counterweight is installed
(below spoon).
• Make sure the rear arm
counterweight is installed.
Gun rotation slows down
over time
• Refer to first troubleshooting tip
above for non-rotating or slow
rotation.
Trip stop mechanism is not
holding the gun at the
desired arc
• Make sure that the trip stops are
not loose by pushing against them
with your finger. (See Figure 3)
• Turn your gun manually to the trip
stops. They should hold when the
trip lever pushes against them.
• If your Rain Gun has recently been
re-assembled, make sure that the
trip lever was not reinstalled in
between the trip stops. This will
open the trip mechanism and not
stop the Rain Gun.
Arm does not move
• Check the pressure at the gun
• Check that the nozzle is properly
installed on the nozzle housing
• Make sure that the nozzle retainer
is tightened
• Check that the spoon is not broken
• Check that the mechanical stop
(arm stop) on the arm is not
damaged
• Check that the arm is not bent
Troubleshooting Tips
