Nelson 100 Series Big Gun Handleiding

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Nelson Irrigation Corp. 848 Airport Rd. Walla Walla, WA 99362-2271 USA Tel: 509.525.7660 Fax: 509.525.7907 E-mail: [email protected] Web site: www.nelsonirrigation.com

NELSON IRRIGATION BIG GUN

®

SPRINKLERS

12/04

TROUBLE SHOOTING

In normal operation the Nelson Big Gun drive smoothly and at the same speed in both directions.

If a Nelson Big Gun is damaged or worn the rotation speed may slow down, move faster in one

direction than the other, or the drive arm action may be so weak or irregular that the Big Gun does

not rotate at all. Here are some trouble shooting guidelines. They cover the most common problems

and they are demonstrated very well in the video that accompanies this manual. Figure 1 shows

the main components that will be discussed.

Figure 1. SR100 Big Gun Components

1. Check the Drive Vane

The force of the water hitting the angled side of the drive vane provides the rotational force that

drives the Big Gun. If the drive vane is loose, chipped or broken the forces will not rotate the Big

Gun at the design speed or even in the correct direction. Replace the drive vane if it is damaged.

Do not insert spacers or washers underneath the drive vane. If it appears that this is necessary then

the drive arm is probably bent.

2. Check the Drive Arm.

The drive arm swings up and down and brings the drive vane back into the water stream in its cor-

rect alignment. If the drive arm is bent the drive vane will not be positioned in the right part of the

water stream. Poor rotation will result. There are two simple tests to check if the drive arm is bent

over vertically or bent from side to side.

1.1

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