Nelson Irrigation Corporation 848 Airport Road Walla Walla, WA 99362-2271 USA Tel: 509.525.7660 Fax: 509.525.7907 E-mail: info@nelsonirrigation.com Web site: www.nelsonirrigation.com
SRNV100 BIG GUN
®
ADJUSTMENT
8/01
item part number description qty.
1 8506 Nut, 7/16-14 UNC 1
2 8469 Valve Seat Assembly 1
3 8510 Nozzle Lever Assembly 1
4 6124 Cotter Pin, 3/32 x 3/4 8
5 7263 Pivot Pin 1
6 6110 Flat Washer AR
7 6110-001 Flat Washer (Thick) AR
8 7264 Lower Toggle Pin 1
9 7265 Upper Toggle Pin 1
10 7719 Linkage Assembly 1
11 7297 Actuator Pin 1
12 7296 Jam Nut 1
13 7797 Washer 1
14 7276 Actuator Assembly 1
PROBLEM: Nozzle stopper (valve seat) continues to leak when closed.
SOLUTION: 1. Adjust valve seat to assure even contact on nozzle seal surface.
a. Disconnect actuator pin .
b. Loosen the valve seat locking nut .
c. Rotate lever assembly to closed position and hold valve seat
lightly against nozzle seal surface. Adjust valve seat by rotating the
stopper in or out as required to achieve full contact with the nozzle seal surface.
d. Tighten the locking nut .
2. Adjust linkage to assure adequate closure force.
a. Adjust linkage assembly at A so that 12-15 pounds force is required to
push link B against closure stop (disconnect and reconnect lower toggle
pin during adjustment as required to check closure).
b. Reconnect actuator pin .
PROBLEM: Nozzle stopper wont clear stream when open.
SOLUTION: Adjust actuator position to assure complete opening.
a. Loosen jam nut .
b.Hold nozzle lever in the fully open rest position.
c. Rotate actuator assembly toward main elbow until rest buttons contact
and all play is removed from the linkage. Rotate further as needed until
drain hole and hose fitting port are oriented to the bottom.
d. Tighten jam nut .
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