Nelson SRA150 BIG GUN Troubleshooting guide

SR/SRA150 BIG GUN®OPERATION AND MAINTENANCE INSTRUCTIONS

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

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.

OM-SR/SRA150-4

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

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.

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.

Drive Vane

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.

Drive Arm

Nozzle

Arm Weight

Shift Lever

Trip Lever

HD Lower Bearing

Stops

The SRA150 is a variable trajectory model with adjustability from 15-45°.

Drive Vane

Drive Arm

Nozzle

Arm Weight

Shift Lever

Trip Lever

HD Lower Bearing

Stops

Turn-Buckle (for trajectory adjustment)

Calibrated Scale (not shown)

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

2/14

SR/SRA150 MAINTENANCE

SEE SR/SRA150 PARTS LISTS FOR COMPLETE PARTS LIST AND DESCRIPTION

DISASSEMBLY REASSEMBLY

STEP 4

Inspect seal spacer and counter-

weight spacer for wear. If spacers

show excessive wear, replace both

spacers and #6600 Seals. To

remove seals, drive thin-bladed

screwdriver under lip of seal and

pry seal out. To replace seals, use

block of wood over seal making

sure lip is to the outside, and secure

by lightly tapping on wooden block

until seal lip is flush with hub.

STEP 5

Remove #10070-001 Cap

Assem-bly. Using external retaining

ring pliers, remove #8323-017

Retaining Ring. Pull Shift lever from

mount. A gear puller will help in

removing the lever.

STEP 9

Snap in two #10067-001 Arm

Cap Assemblies. Install two

#6565 Retaining Rings. Arm

must have free movement at this

point. If arm feels sticky, assure

that lip seals at counterweight and

right arm hub are not rubbing on

each other.

STEP 10

Mount trip lever assembly along

with spring guide onto their

respective pins. Install #8323-04

Retaining Ring. Install #8263 Cap

using two #8311 Screws making

sure #8265 gasket is in place.

Install #8409 Washer and #7814

Cotter Pin onto spring guide.

STEP 3

Using a thin-bladed screwdriver,

push #8327-001 Spacer back

into arm hub. Holding onto

counterweight, remove arm and

weight. Be careful not to damage

seals.

STEP 8

Holding counterweight in place on

the left side of shift lever, roll drive arm

into position shown by pushing on the

left arm bearing. Work #8327-001

Spacer into seal on counterweight.

Be sure spacer is correctly positioned

in counterweight to prevent cutting

of the seal lip. Push shaft through

the bearings and spacers and

assemble #6603 Nut. Torque to 25

ft. lbs. using two 11/16” sockets.

STEP 2 (Drive Arm)

Using internal retaining ring pliers,

remove two #6565 Retaining

Rings from both arm hubs. Remove

two #10067-001 Arm Caps. Using

two 11/16” sockets, loosen and

remove one #6603 Nut from left

side of arm. Holding the opposite

#6603 Nut, pull shaft free from hub.

STEP 7 (Drive Arm)

Lubricate #6600 Seal lips with

#9673 Silicone Grease. Install

#8327-001 Spacer flush with

#6600 Seal in left arm hub. Insert

#6607-001 (coated spacer) in right

arm hub and #6607 (uncoated

spacer) in left counterweight seal

(or a second #6607-001 coated

spacer). Start #8297 Shaft into right

arm hub.

STEP 1 (Trip Lever)

Remove #6714 Cotter Pin from

#8197 Pin. Remove two #8311

Screws and #8263 Cap. Using

small retaining ring pliers, remove

#8323-004 Retaining Ring. Pull

entire trip lever assembly and

spring guide from gun. At this time

inspect wear on #8282 Follower.

Replace if worn.

STEP 6 (Shift Lever)

At the upper portion of the gun,

inspect the mount shaft for wear.

Press the #8589 Shift Lever

assembly onto the mount. With

external retaining ring pliers,

snap the #8323-017 Retaining

Ring on. Be sure #8272 Cap

Gasket is in place and in good

condition. Replace #10070-001

Cap Assembly

Spring

Guide

#8197

#8282

#8323-004

#6600

Counterweight

#8323-017

Mount Shaft

#10070-001

#8589

Left Hub

Right Hub

#8327-001

#8465

#10067-001

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

LOWER BEARING MAINTENANCE

DISASSEMBLY (LOWER UNIT) REASSEMBLY (LOWER UNIT)

STEP 14

Remove #8400 Cover from shaft.

Remove #8372 Seal from cover.

Remove #8371 brake ring and

#8473 dust seal from shaft.

Inspect all parts for wear and

replace as required.

STEP 15

Assemble #8473 Dust Seal onto

#8459 Shaft Assembly. Slide

#8371 Brake Ring onto shaft.

Locate the four studs of the brake

ring in the center holes between

the smaller threaded holes.

STEP 19

Assemble #8461 Gasket. Install

#8475-001 O-Ring in #8401

Flange and mount onto assembly

using three #8462 Bolts. Torque

bolts to 130-150 in. lbs.

SEE BACK PAGE FOR PARTS LIST

STEP 13

Remove the #8373 Seal. To remove

the two #6253 Bearings use a

hammer and three blocks of

wood. Lightly tap uniformly

around inner race of bearing until

removed. Bearings are removed

from opposite sides of the #8405

Housing.

STEP 18

Install #6548 O-Ring in #8402

Retainer and assemble retainer on

shaft. Using method described in

disassembly (Lower Unit) instruct-

ions Step 12, secure bearing shaft

from rotating. Torque on #10068

Retainer Assembly to 100-120 ft.

lbs. Assemble #8373 Lip Seal.

Orient with lip side out.

STEP 12

The #10068 Retainer Assembly

is removed by using a spanner

wrench with unit still bolted into

vise. NOTE: An extension handle

on the spanner wrench may be

needed to loosen the retainer.

Remove retainer and flange,

and slide #8405 Housing from

bearing shaft.

STEP 17

Assemble #8461 Gasket. Press

on #8405 Housing. Fully pack

housing with #6143 Lubricant.

Assemble #6253 Bearing into

housing.

STEP 11

After removing bearing from gun,

insert two 5/16-18” #8408 Bolts

into shaft top. Clamp bolt heads

into a vise securely. Remove three

#8462 Bolts (or #10153-001 for

ANSI/DIN).

STEP 16

Place #8372 Lip Seal into #8400

cover as shown with Nelson name

toward ball bearing. Pack #6253

Bearing with #6143 lubricant

or equivalent. (See “Notes on

Lubrication” on the front cover.)

Press bearing into #8400 Cover.

Slide cover assembly onto bearing

shaft. CAUTION: Do not get

grease on brake surface.

2/14

#8462

#10068

#8405

#8400

#8372

#8371

#8459

#8371

#8473

#8372

#6253

#8373

#8402

#8475-001

#8401

10069 Flange Assembly

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

LOWER BEARING ASSEMBLY PARTS LIST

2/14

SEE SR150/SRA150 PARTS LISTS FOR DETAILS ON OTHER PARTS

NELSON/EURO

FLANGE

*Flange assembly includes 8475-001

8458 NELSON/EURO FLG. CONN.

This manual suits for next models

Other Nelson Industrial Electrical manuals