Hunter Institutional Series Quick Start Manual

ARC ADJUSTMENT

All I-40-36S-ON heads are 360˚ ONLY. There
is no arc adjustment. For less than 360˚ use
I-40-ADS.

RADIUS ADJUSTMENT

Insert the hex end of the Hunter wrench into the
nozzle-retainer/range-adjustment screw (Fig. 1).
Turn the screw clockwise into the stream of water
to decrease the radius, or counter-clockwise to
increase the radius.

PRECIPITATION RATE ADJUSTMENT

Where excessively wet or dry areas are a
problem, the precipitation rate may be adjusted.
Simply replace the existing nozzle with a larger
one to increase, or a smaller one to decrease the
rate of precipitation.

NOZZLE INSTALLATION

1. Insert the key end of the Hunter wrench into
the lifting socket of a pop-up sprinkler. Pull the
riser up to gain access to the nozzle socket.
2. Using the Hunter wrench, loosen the nozzle-
retainer/range-adjustment screw. If a nozzle is
already installed in the sprinkler, it may now be
removed by briefly turning on the water.
3. Discard nozzle if removed with pliers.
Slip the desired nozzle into the nozzle socket.
Note that the socket is angled up 25˚ (see
Fig. 2). Tighten the nozzle-retainer/range-
adjustment screw.
4. Install like opposing nozzles.
Hunter Industries Incorporated • The Irrigation Innovators
www.HunterIndustries.com
Institutional Series
™
Gear-Driven Sprinklers
I40
Correct Installation
© 2007 Hunter Industries Incorporated
P/N 700590
I-40-36S-ON
ON
V
LIT-276 4/07