Nelson BIG BUN SR75 Operation & Maintenance Instructions Manual

SR75 BIG GUN
SET UP FOR OPERATION:
1. Install desired Taper Ring size in ring nozzle
cap. The ring nozzle cap can be sufficiently
tightened by hand.
2. Adjust location of stops to give desired arc
of coverage. Stops must be mounted so that
arrows point toward each other and 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.
NOTE ON LUBRICATION:
The SR75 sprinkler is lifetime lubricated and
does not require periodic lubrication. The ball
bearings in the HD 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.
SR75 DRIVE ARM
ASSEMBLY COMPONENTS
10192 Spacer
6603 Nut
4 8311 Screw,
#8-32 x .375",
Self Tapping Pan Head
Nelson Irrigation Corporation 848 Airport Rd. Walla Walla, WA 99362-2271 USA Tel: 509.525.7660 Fax: 509.525.7907 info@nelsonirrigation.com Web site: www.nelsonirrigation.com
OPERATION & MAINTENANCE INSTRUCTIONS
®
6598 Ball Bearing
10189 Spring
10194 Spacer
10191 Cam
10231 Cap Assembly, Arm Bearing
Consists of: 1 10190 Cap, Arm Bearing
1 6563 O-Ring
SR75 BIG GUN
Arm Weight
Trip Lever
The SR75 is available in fixed trajectory angles of
18°, 21°, 24°, 43°
CAUTION: 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.
6598 Ball Bearing
10214 Spacer
1
®
Drive Vane
Drive Arm
Nozzle
Shift Lever
Stops
Lower Bearing Assembly (HD page 4,
CB page 5) Note: CB Bearing not available
for 18° center pivot gun.
10377 O-Ring, Non-Standard
.459 I.D. x .040 C.S.
10193 Spacer, Teflon Coated
6600 Seal
OM-SR75-5 10/13