Nelson SRA150 BIG GUN Operation And Maintenance Instructions

SR/SRA150 BIG GUN
SET UP FOR OPERATION:
1. Install nozzle. If using ring nozzle set,
or taper ring nozzle, install desired ring
size in ring nozzle cap. Assure the ring
is centered. The ring nozzle cap can
be sufficiently tightened by hand.
2. Adjust location of arc stops to give
desired arc of coverage. Stops must
be mounted so that arrows point toward
each other and the trip lever is located
between arrows. If the stops are set
incorrectly on the wrong end of the
arc, the sprinkler will fail to reverse.
3. The SR150 and SRA150 are factory
set for normal rotation speed. If a
faster or slower speed is desired,
move arm weight backward for
faster operation or forward for slower
operation.
4. To vary the trajectory angle of the
SRA150 simply adjust the turn-buckle
and dial in the desired trajectory
using the calibrated scale. Varying
trajectory angle is simple, and can
be used to increase wind-fighting
ability or to avoid obstacles such
as power lines in the field.
NOTE ON LUBRICATION: The SR/SRA150 sprinkler is lifetime lubricated and does not require periodic lubrication.
The ball bearings in the H.D. lower bearing operate in a water resistant lubricant that is packed in the housing cavities
and retained by seals. If repair of the lower bearing is done, it is recommended to use Nelson #6143 lubricant or a
good grade of water resistant lubricant such as Lubriplate 130-AA.
BE CAREFUL: Read operating instructions before operating sprinkler or making any adjustments. Never make
adjustments or perform service while sprinkler is in operation. Stand clear of operating sprinkler. Stand clear of high
velocity water stream. Never direct water stream onto roadway or electrical transmission lines.
WARRANTY AND DISCLAIMER
Nelson Big Gun Sprinklers are warranted for one year from date of original sale to be free of defective materials and workmanship when used within
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the working specifications for which the product was designed an under normal use and service. The manufacturer assumes no responsibility for
installation, is limited solely to replacement or repair of defective parts, and the manufactures will not be liable for any crops or other consequential
damages resulting from any defects or breach of warranty. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSES AND OF ALL OTHER OBLIGATIONS
OR LIABILITIES OF MANUFACTURER. No agent, employee or representative of the manufacturer has authority to waive, alter or add to the provision
of the warranty, nor to make any representations or warranty not contained herein.
Nelson Irrigation Corporation 848 Airport Rd. Walla Walla, WA 99362 USA Tel: 509.525.7660 Fax: 509.525.7907 E-mail: nelson@nelsonirr.com Web site: www.nelsonirrigation.com
SR/SRA150 BIG GUN
OPERATION AND MAINTENANCE INSTRUCTIONS
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Shift Lever
Trip Lever
The SR150 is available in fixed trajectory angles of 21°, 24°, 27° and 43°.
A trajectory modification using a 12° wedge kit #11237 is available.
Shift Lever
Trip Lever
The SRA150 is a variable trajectory model with adjustability from 15-45°.
Drive Arm
Arm Weight
Stops
HD Lower Bearing
Drive Arm
Arm Weight
Turn-Buckle (for trajectory adjustment)
Calibrated Scale (not shown)
Stops
HD Lower Bearing
OM-SR/SRA150-4
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Drive Vane
Nozzle
Drive Vane
Nozzle