Hunter Institutional Series User manual

LIT-364 7/24/02 3:46 PM Page 1
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I-90 Riser Assembly
I-90 ADV & 36V NOZZLE INSTALLATION:
Caution! The riser assembly is under spring
tension. Eye protection should be worn and proper
procedures followed when servicing this product.
Tools needed: Phillips screwdriver, riser service tool
P/N 279600, needle-nose pliers.
Preparation
Unscrew the body cap from the body, then withdraw
the riser from the body. Place the riser assembly’s
lower end into the base of riser service tool P/N
279600. Press the tool’s metal bar down over the
riser spring until the bar enters the slots in the tool’s
base. Rotate the bar to engage with the tool’s base,
thereby holding the spring under tension.
Nozzle Removal and Replacement
Remove the logo cap, which is retained by a central
Phillips screw. The nozzle is retained in the nozzle
housing by a setscrew. To remove the nozzle, back
out the setscrew using the hex key on the Hunter
wrench so that the nozzle will clear. Grasp the nozzle
with pliers and pull to remove.
Insert the replacement nozzle in the housing. Press
firmly to fully seat the nozzle so that it will clear the
retaining setscrew. Using the hex key on the Hunter
wrench, turn the setscrew down to retain the nozzle.
Note: When changing from one nozzle number
to another, check the stator for proper setting
before returning the head to service.
STATOR RING INSTALLATION:
Note: When installing nozzles you must also
correctly set the stator to ensure proper
speed of rotation. Failure to correctly set the
stator may cause a non-rotation condition.
The stator is located in the base of the riser
assembly. First remove the riser assembly from
the body. Then remove the filter screen to access
the stator.
The stator has a protruding tab that aligns with a
pointer. Remove the stator by grasping this tab
with pliers and pulling. Replace the stator so that
its pointer is set to the number agreeing with the
nozzle installed. Refer to the Nozzle / Stator Chart
below for nozzle and stator settings.
Visually check for proper assembly of nozzles,
setscrews and stator. Reverse the preparation
procedure to reassemble the unit.
Hunter Industries Incorporated • The Irrigation Innovators © 2002 Hunter Industries Incorporated
1940 Diamond St. • San Marcos, CA 92069 • U.S.A. • www.HunterIndustries.com P/N 700945 LIT-364 8/02
Nozzle / Stator Chart
Nozzle Number Stator Position
33
38
43
48
53
63
33
38
43
48
53
63
Retainer Cap
Opening for Nozzle
Riser Assembly
Stator Ring
Filter Screen
®
Institutional Series
I-90
Gear-Driven Sprinklers

LIT-364 7/24/02 3:46 PM Page 2
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Precipitation Rate Adjustment:
If you have excessively wet or dry areas, you can change the
nozzle in the sprinkler to increase or decrease the precipitation
rate. For dry areas, install a larger nozzle. For wet areas, install
a smaller nozzle.
I-90 ADV Only - Arc Adjustment:
Adjustable heads are preset to approximately 180°. Sprinklers
may be adjusted with water on or off. It is recommended that
initial adjustment be made before installation.
Rotate the nozzle turret clockwise to the right stop. This is the
fixed side of the arc. The nozzle turret must be held in this
position for arc adjustments. The right stop does not change.
To Increase Arc:
1. Insert the plastic key end of the Hunter wrench into the
adjustment socket (Fig. 1 & 2).
2. While holding the nozzle turret at the right stop, turn the
wrench clockwise. Each full 360°turn of the wrench increases
the arc 45°.
3. Adjust to any arc between 40°and 360°. The wrench will
stop turning, or there will be a ratcheting noise, when the
maximum arc of 360°(full circle) has been reached.
To Decrease Arc:
1. Insert the key end of the Hunter wrench into the adjustment
socket (Figs. 1 & 2).
2. While holding the nozzle turret at the right stop, turn the
wrench counterclockwise. Each full 360°turn of the wrench
will decrease the arc 45°.
3. Adjust to any arc between 40°and 360°. The wrench will
stop turning, or there will be a ratcheting noise, when the
minimum arc of 40°has been reached.
Note: It is not necessary to disassemble the sprinkler to
make adjustments.
I-90 ADV Only - Aligning the Right (Fixed) Side of the Arc:
If the right side of the arc is not properly aligned, the results
may be a wet walkway or a dry turf area. The right side can
easily be realigned. One way to realign the right stop is to
unscrew the body cap counterclockwise and remove the internal
assembly from the body. Once removed, rotate the nozzle turret
to the right stop, insert the internal assembly back into the body
with the nozzle aligned to the right side of the area you want
irrigated. At this point you realigned the right arc stop, and you
can adjust the left arc to an appropriate setting.
®
Institutional Series
I-90
Gear-Driven Sprinklers
Fig. 2
Fig. 1
Non-
Potable
Water
Arc Adjustment
Socket
Specific
Model
Lift Up
Socket
I-90 ADV
Arc Adjustment
Direction
* Denotes factory-installed nozzle.
** Preliminary performance data.
Data represent test results in zero wind. Adjust
for local conditions.
Performance data are derived from tests that
conform to ASAE Standard S398.1.
See Hunter Irrigation Products Catalog for
complete ASAE Certification Statement
.