Hunter I-40 - User Manual

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ARC ADJUSTMENTS

(N O N -OPPO S I N G N OZZL E M O DE L)

All I-40 group adjustable heads are preset to approximately 180°.

Sprinklers may be adjusted with water on or o. It is recommended

that initial adjustment be made before installation.

1. Using the palm of your hand, rotate the nozzle turret counter -

clockwise to left stop to complete any interrupted rotation cycle

(Fig. 1).

side of the arc. The nozzle turret must be held in this position

for all arc adjustments.

To I ncrease Arc

1. Insert the key end of the Hunter wrench into the adjustment

socket (Figs. 2 & 3).

2. While holding the nozzle turret at the right stop, turn the

wrench clockwise. Each 360° turn of the wrench increases the

arc 45°.

3. Adjust to any arc between 50° and 360°.

4. Wrench will stop turning, or there will be a ratcheting noise,

when the maximum arc (360°) is reached.

5. When set to 360°, the sprinkler will rotate continually

counterclockwise.

To Decrease Arc

1. Insert the key end of the Hunter wrench into the adjustment

socket (Figs. 2 & 3).

2. While holding the nozzle turret at the right stop, turn the

wrench counterclockwise. Each 360° turn of the wrench

decreases the arc 45°.

3. Adjust to any arc between 50° and 360°.

4. Wrench will stop turning, or there will be a ratcheting noise,

when the minimum arc (50°) is reached.

Radius Adjustment

Insert the hex end of the Hunter wrench into the nozzle-retainer/

range-adjustment screw (Figs. 2 & 3). Turn the screw clockwise

into the stream of water to decrease the radius, or counterclockwise

to increase the radius.

P recipitation 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 I nstallation

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

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. 4). Tighten the nozzle-retainer/range-adjustment screw.

Institutional Series

™

I -40

Gear-Driven Sprinklers

Fig. 1

Fig. 2

Nozzle

Retainer/

Range

Adjustment

Scre w

Arc Adjustment

So cke t

Fig. 3

Lift Up

So cke t

Recess

for Nozzl e

ID Button

I40

Arc Adjustment

Direction

I-40

ADS

Fig. 4

Water

ow

NO N-S TR IPPABLE BACKDR IVE

This sprinkler is designed with an internal device that prevents

damage to the internal gear drive if it should be turned by

vandals. This important feature works when the nozzle turret

is turning in either direction. This makes the sprinkler very

durable in all applications.

AUTO ARC RETUR N

This sprinkler is designed with an internal device that re-aligns

the arc if it is turned by vandals. This important feature works

when the nozzle turret is turning in either direction. When

forced outside of the originally set arc, the sprinkler takes the

shortest path back to the pattern without going completely

around. This saves the non-irrigated areas from getting wet!

Always a good thing!

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Quick Start Guide2 pages

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Summary

Arc Adjustments

To Increase Arc

Instructions for increasing the sprinkler arc by turning the adjustment wrench clockwise.

To Decrease Arc

Instructions for decreasing the sprinkler arc by turning the adjustment wrench counterclockwise.

Radius Adjustment

Instructions for adjusting the sprinkler radius using the nozzle-retainer/range-adjustment screw.

Precipitation Rate and Nozzle Installation

Precipitation Rate Adjustment

Adjusting the precipitation rate by replacing the existing nozzle with a larger or smaller one.

Nozzle Installation

Procedure for installing a new nozzle into the sprinkler socket.

Sprinkler Features

Non-Strippable Backdrive

Internal device preventing damage to the gear drive if the sprinkler is turned by vandals.

Auto Arc Return

Internal device that re-aligns the arc when turned by vandals, returning to the set pattern.

Performance Data

I-40 Nozzle Performance Data

Table detailing pressure, radius, flow, and precipitation rate for various nozzles.

I-40 High Speed Performance Data

Table detailing performance data for high-speed nozzles.

I-40 Dual Opposing Performance Data

Table detailing performance data for dual opposing nozzles.

Summary

Arc Adjustments

To Increase Arc

Instructions for increasing the sprinkler arc by turning the adjustment wrench clockwise.

To Decrease Arc

Instructions for decreasing the sprinkler arc by turning the adjustment wrench counterclockwise.

Radius Adjustment

Instructions for adjusting the sprinkler radius using the nozzle-retainer/range-adjustment screw.

Precipitation Rate and Nozzle Installation

Precipitation Rate Adjustment

Adjusting the precipitation rate by replacing the existing nozzle with a larger or smaller one.

Nozzle Installation

Procedure for installing a new nozzle into the sprinkler socket.

Sprinkler Features

Non-Strippable Backdrive

Internal device preventing damage to the gear drive if the sprinkler is turned by vandals.

Auto Arc Return

Internal device that re-aligns the arc when turned by vandals, returning to the set pattern.

Performance Data

I-40 Nozzle Performance Data

Table detailing pressure, radius, flow, and precipitation rate for various nozzles.

I-40 High Speed Performance Data

Table detailing performance data for high-speed nozzles.

I-40 Dual Opposing Performance Data

Table detailing performance data for dual opposing nozzles.

The Hunter I-40 Gear-Driven Sprinkler is a robust and versatile irrigation device designed for efficient water distribution in various landscape settings. This institutional series sprinkler offers a range of adjustable features, allowing users to fine-tune its performance to specific site requirements, ensuring optimal coverage and water conservation.

Function Description

The I-40 sprinkler operates on a gear-driven mechanism, which ensures smooth and consistent rotation for even water application. Its primary function is to deliver water over a specified arc or a full 360-degree circle, effectively irrigating lawns, gardens, and other planted areas. The gear-driven design contributes to its durability and quiet operation, making it suitable for both residential and commercial applications.

A key feature of this sprinkler is its adjustable arc, which allows users to set the watering pattern from a narrow sector to a full circle. This adjustability is crucial for avoiding irrigation of non-target areas such as sidewalks, driveways, or buildings, thereby minimizing water waste and potential damage. The sprinkler is also designed with a radius adjustment capability, enabling users to control the distance the water travels, further enhancing its precision.

The I-40 incorporates advanced internal mechanisms to enhance its reliability and user-friendliness. It features a non-strippable backdrive, an internal device that prevents damage to the gear drive even if the nozzle turret is forcibly turned by vandals. This feature significantly increases the sprinkler's durability, especially in public or high-traffic areas. Additionally, the sprinkler includes an auto arc return function. If the nozzle turret is turned out of its originally set arc by external forces, this mechanism automatically re-aligns the arc by taking the shortest path back to the programmed pattern. This prevents the sprinkler from watering non-irrigated areas, contributing to water efficiency and maintaining the intended irrigation design.

Usage Features

The I-40 sprinkler is designed for ease of use, with several features that simplify installation, adjustment, and operation.

Arc Adjustment:

The sprinkler comes preset to approximately 180 degrees but can be adjusted with water on or off, though initial adjustment before installation is recommended. To increase the arc:

Rotate the nozzle turret counter-clockwise to the left stop using the palm of your hand to complete any interrupted rotation cycle.
Rotate the nozzle turret clockwise to the right stop. This position is the fixed side of the arc and must be maintained during all arc adjustments.
Insert the key end of the Hunter wrench into the adjustment socket.
While holding the nozzle turret at the right stop, turn the wrench clockwise. Each full 360-degree turn of the wrench increases the arc by 45 degrees.
The arc can be adjusted to any angle between 50 and 360 degrees. The wrench will stop turning, or a ratcheting noise will be heard, when the maximum arc (360 degrees) is reached. When set to 360 degrees, the sprinkler will rotate continuously counter-clockwise.

To decrease the arc:

Insert the key end of the Hunter wrench into the adjustment socket.
While holding the nozzle turret at the right stop, turn the wrench counter-clockwise. Each full 360-degree turn of the wrench decreases the arc by 45 degrees.
The arc can be adjusted to any angle between 50 and 360 degrees. The wrench will stop turning, or a ratcheting noise will be heard, when the minimum arc (50 degrees) is reached.

Radius Adjustment:

To adjust the radius, insert the hex end of the Hunter wrench into the nozzle-retainer/range-adjustment screw. Turning the screw clockwise will decrease the radius by deflecting the stream of water, while turning it counter-clockwise will increase the radius.

Precipitation Rate Adjustment:

For areas that are excessively wet or dry, the precipitation rate can be adjusted by replacing the existing nozzle. A larger nozzle will increase the rate of precipitation, and a smaller nozzle will decrease it.

Nozzle Installation:

Insert the key end of the Hunter wrench into the lifting socket of a pop-up sprinkler and pull the riser up to access the nozzle socket.
Use the Hunter wrench to loosen the nozzle-retainer/range-adjustment screw. If a nozzle is already installed, it can be removed by briefly turning on the water.
Discard the old nozzle if removed with pliers.
Slip the desired new nozzle into the nozzle socket, noting that the socket is angled up 25 degrees.
Tighten the nozzle-retainer/range-adjustment screw.

Maintenance Features

The I-40 sprinkler is designed for minimal maintenance, thanks to its durable construction and self-protecting features. The non-strippable backdrive and auto arc return mechanisms significantly reduce the likelihood of damage from external forces, thereby extending the sprinkler's lifespan and reducing the need for repairs.

Regular inspection of the nozzles is recommended to ensure they are free from debris that could obstruct water flow or alter the spray pattern. If a nozzle becomes clogged or damaged, it can be easily replaced using the steps outlined for nozzle installation. The ability to adjust the precipitation rate by simply swapping nozzles also contributes to easy maintenance, allowing users to adapt the sprinkler's performance to changing landscape needs or environmental conditions without complex adjustments.

Overall, the Hunter I-40 Gear-Driven Sprinkler is a reliable, adjustable, and durable irrigation solution, offering precise water delivery and robust protection against common issues, making it an excellent choice for maintaining healthy and vibrant landscapes.

Hunter I-40 Specifications

General

Model	I-40
Category	Irrigation System
Riser Height	4 inches
Warranty	5 years
Inlet	1 inch NPT
Material	Plastic
Spray Pattern	Adjustable Arc; Full Circle
Trajectory	25° standard; 11° low angle