Herd GT-77 Installation instructions

S U R E - F E E D
BROADCASTER
Instructions for
ASSEMBLY, MOUNTING,
BROADCASTING, OPERATING and
MAINTENANCE
REPAIR PARTS LIST
HERD SEEDER COMPANY, INC.
P.O. Box 448 • 2383 South U.S. 35
Logansport, IN 46947
Phone: [phone] • Fax: [phone]
Email: [e-mail]
www.herdseeder.com
MODEL GT-77
FOR ATV’S
MODEL GT-77 PARTS LIST 8/7/07 10:28 AM Page 1

MODEL GT-77
For ATV’s
WARNING
KEEP HANDS, FEET AND CLOTH-
ING AWAY FROM SPINNING
BLADES.
STAY CLEAR OF ALL MOVING
PARTS WHEN IN OPERATION.
KEEP OTHERS AWAY.
KEEP ALL GUARDS IN PLACE.
STOP MACHINE AND DISCON-
NECT POWER BEFORE ADJUST-
ING, LUBE OR SERVICE.
To Prevent Serious Personal Injury or Death:
SPINNING BLADES HAZARD
Warning Decal - If missing
Call 574/753-6311 for free
replacement.
“CAUTION” KEEP HANDS, FINGERS AND LOOSE CLOTHING WELL AWAY
FROM SPINNING FAN OR INJURY MAY RESULT.
For your own record fill in the following:
Date Purchased ________________ Serial Number ______________________
Purchased From ________________ Model Number______________________
_____________________________
DESIGNS SUBJECT TO CHANGE WITHOUT NOTICE
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MODEL GT-77 PARTS LIST 8/7/07 10:29 AM Page 2

PARTS and ACCESSORIES FOR MODEL GT-77 BROADCASTER for A.T.V.’s
Shown in Drawing
When ordering parts, order by both part name and number ... not drawing number.
Drawing Part Number
Number Number Name of Part Needed
1. 500 Grey-Iron Base for GT-77............................................................... 1
3. & 4. 410A 1/2” x 1” Hexhead Capscrew w/Lock Washer................................ 2
8. 911 Hopper Complete with Screws & Decals ...................................... 1
9. & 11. 912 Lid w/Cotter Key ............................................................................ 1
10.,12.,13. 913 Lid Spring w/Screw, Washer & Nut .............................................. 1
14. 778 12-Volt Motor w/Whiz Nuts (#779)................................................ 1
15. 501 Fan 4-Bladed (Plastic), 5/16” Shaft Hole, w/St. St. Setscrews .... 1
16. 502 1/4” x 3/8” Socket Screw, S.S. (Included with 501 Fan) ............... 2
17. 779 Whiz Nut (10-32) - Used on Motor ................................................ 2
19. 812 Complete Wiring Assembly ............................................................ 1
23. 794 Push-Pull Switch ............................................................................ 1
26. 541 Switch Bracket ............................................................................... 1
30. 107 1/4” x 1/2” Hex Head Cap Screw ................................................... 1
31. 512 Brace Rod - 5/16” Hole in End (Used on Carton “D” only) .......... 4
32.,33.,34. 407 5/16” x 1” Machine Bolt w/Nut and Lock Washer ........................ 2
35.,36.,37. 924 Brace Rod Clamp, Complete (Used on Carton “D” only) ............. 2
42. 781 Round Head Machine Screw, Left-Hand Thread - Used to
Bolt Bronze Bushing to Fan .......................................................... 1
43. 507 3/16” x 3/8” Round-head Machine Screw, St. St., w/Washer........ 1
44. & 45. 503 Bronze Agitator Bushing - Used on Fan & Pivot Plate ............... 2
46. 209 Vibrating Agitator - Stainless Steel .............................................. 1
47. 508L Nipple - Used on Agitator .............................................................. 1
48. *517 Blocking Plate - Optional (Must be purchased separately) ......... 1
49. 802S Pivot Plate - Stainless Steel .......................................................... 1
50. 510 3/16” x 3/8” Round-head Machine Screw, St. St. .......................... 4
51. 509 Guide Assemblies for Seed Gate (1 Set Consists of 2)
- Stainless Steel .............................................................................. 2 Sets
52. 504 Opening Plate w/Connecting Linkage - St. St.............................. 1
53. 803S Opening Gauge Control Plate w/515 Carriage Bolt, Wing Nut
and Washer - Works with Pivot Plate 802S - Stainless Steel ..... 1
54.
56. & 57. 515 1/4” x 1/2” Carriage Bolt, St. St. - w/Wing Nut & Washer........... 1
58. & 59. 516 1/4” x 1/2” Hexhead Capscrew, St. St. - w/Washer ....................... 2
60. & 61. 505 1/4” x 1/2” Pan Head Bolt, St. St. - w/Locking Nut...................... 1
62. 792 Control Handle ............................................................................... 1
63.,64.,65. 806A 3/16” x 1-3/4” Machine Screw, w/Nut & Washer........................... 1
66. 807 Compression Spring - Used on Handle Bolt ................................. 1
67. 831 “HERD Sure-Feed Broadcaster” Decal ......................................... 1
68. 210 Decal - Model GT-77 ....................................................................... 1
69. 1091 “WARNING” Spinning Blades Decal............................................. 1
70. 408A #10 x 3/4” Phillips Truss Head Machine Screw w/Nut ................ 4
511 Stand (Supplied with Mounting Carton D, JD-1 and U only) (Not Shown) 1
514B 1/2” x 1-3/4” Hexhead Capscrew, Lock Washer & Nut (Not Shown) 1
*Special blocking plates available for fire ant baits. Call factory for details.
1
MODEL GT-77 PARTS LIST 8/7/07 10:29 AM Page 3

ASSEMBLY INSTRUCTIONS FOR ALL A.T.V.’S.:
1. Take broadcast seeder GT-77 from carton and place it upside down on the hopper.
2. Rotate handle around and remove bolt and self-locking nut. Run bolt through seed-gate linkage, then
through the handle, making sure that the thread end is pointing up, toward you. Replace self-locking
nut. Do not over-tighten, as it must pivot at this point.
3. Remove the two 1/2” bolts from the grey-iron base part number 500 and keep these for mounting of
ATV mounting brackets.
4. Follow the supplemental instructions for mounting the GT-77 seeder to your specific A.T.V.
WIRING INSTRUCTIONS
1. Be safe! Disconnect ground wire from battery before wiring.
2. Connect the short line with the fuse (20 Amp) in the line to the battery on the positive (+) side.
3. Be sure to replace safety cap over battery terminal, if one is furnished.
4. Connect forked end of long wire to either terminal on switch. Connect female end to male end of
“Quick- Connector” on fuse line.
5. Connect orange wire from motor to other terminal on switch.
6. The black wire on the motor is the ground. Make sure it is connected to the bottom of the motor. It is
best to run a ground wire from the battery to any part of the frame or seeder. If that does not work,
splice into the ground (black wire) on the motor to the battery ground.
7. Reconnect vehicle ground to battery.
8. Same as #5.
CLEANING AND STORAGE OF BROADCASTER
After removing the broadcaster from the A.T.V., turn it upside-down on the hopper, so that all material
remaining in the hopper is removed. Then wipe or brush out any remaining material. If compressed air is
available, use it to blow off any residue from the broadcaster and the electric motor. The electric motor is
sealed and does not require any maintenance, other than removing any external residue.
If the broadcaster is used to spread corrosive material like fertilizer or ice melter, wiping a fine film of oil
on the working parts will keep them working free in the future. The pivot plate and all the parts attached
to it are made of stainless steel and are rust-resistant for years of life.
The fused end of the “Quick-Connect” battery lead may be left on the A.T.V. for future use but be sure to
disconnect the wiring harness at the disconnect socket and not at the fuse holder.
The broadcaster should be stored in a dry storage area when not in use. High moisture areas will cause
condensation internally to the motor and will significantly shorten the motor life.
HERD SEEDER COMPANY, INC., LOGANSPORT, IN 46947
2
MODEL GT-77 PARTS LIST 8/7/07 10:29 AM Page 4

TIPS FOR USING BROADCASTERS
1. WATCH YOUR SPEED! Do Not Go Too Fast For Conditions. If Ground Is Rough, Cut Your Speed.
Remember when seeder is loaded it causes much strain on A.T.V.s and hitch brackets when you start
bouncing through holes and rough ground. The hitches were designed for normal usage, so do not get
carried away and go too fast.
2. As is common with all broadcast seeders, do not use on windy days as this will cause erratic spread,
especially with herbicides and may cause damage to crops in nearby fields.
3. If your equipment (or vehicle) has a battery and charging system, keep your R.P.M.s sufficiently high
enough to charge at all times.
4. The easy way to determine the ground speed of your A.T.V. or tractor is to set two stakes in the
ground, 88 feet apart, and check with the chart below.
At 2 M.P.H. you will travel 88 ft. in 30 seconds
At 3 M.P.H. you will travel 88 ft. in 20 seconds
At 4 M.P.H. you will travel 88 ft. in 15 seconds
At 6 M.P.H. you will travel 88 ft. in 10 seconds
At 8 M.P.H. you will travel 88 ft. in 7 1/2 seconds
5. After determining the gear and throttle settings of the A.T.V. mark the settings so the throttle can be
returned to the proper location when broadcasting.
6. This broadcaster is equipped with a centering pivot plate, which can be moved to center the spread of
material. To change location, loosen two capscrews holding pivot plate to bottom of base and move it
to a higher or lower letter by taking hold of the seed gauge and moving as explained in next step. A
good starting point is to move the seed gauge to the letter “C” for most Clover, Alfalfa and Fertilizers.
7. If you see your spread is heavy on one side or the other, after you start to spread, do the following to
center the pattern of spread: (You distinguish the difference between right and left by standing
behind the A.T.V. or tractor and broadcaster and facing the direction the A.T.V. or tractor will travel.)
(a) When the pattern of spread is off-center to your right, move the pivot
plate to a lower letter.
(b) If your spread is off-center to your left, move the pivot plate to a higher
letter.
(c) Do not move over one letter at a time or you may over-correct.
INSTRUCTIONS FOR INSTALLING OPTIONAL BLOCKING PLATE 517
1. Loosen two capscrews holding pivot plate to base and center pivot plate.
2. Remove pivot screw and bushing in pivot plate that anchors agitator to pivot plate. Slide the blocking
plate under agitator and over the four protruding screws, making sure that protrusion lays down in
opening of pivot plate and blocking plate is flat against pivot plate.
3. Replace pivot screw and bushing. Tighten but do not over-tighten. If it is over-tightened, end of screw
will extend through pivot plate in bottom and block movement of opening plate.
HERD SEEDER COMPANY, INC., LOGANSPORT, IN 46947
3
MODEL GT-77 PARTS LIST 8/7/07 10:29 AM Page 5

TO REPLACE VIBRATOR BUSHING ON FAN
1. Remove nipple from pivot plate hole.
2. Remove round head machine screw and bushing holding agitator to pivot plate.
3. Move agitator forward and at the same time, turn fan so that agitator can be removed from bushing
on top of fan.
4. Remove agitator from opening.
5. Turn fan so that bushing and round-head screw can be removed through opening
6. Remove bushing from fan by the following: This round-head machine screw is left-hand threaded,
so turn right to loosen.
7. Replace new bushing. Tighten the left-hand screw tight.
8. Replace agitator through opening, positioning agitator on fan by turning fan so the bushing is
placed between forks on agitator.
9. Replace bushing and round-head machine screw that holds agitator to pivot plate.
10. Replace nipple in round opening.
TO REPLACE NIPPLE
1. Remove nipple from pivot plate hole.
2. Remove round-head machine screw and bushing holding agitator to pivot plate.
3. Move agitator forward and at the same time, turn fan so that agitator can be removed from
bushing on top of fan.
4. Remove agitator from opening.
5. Remove nipple from agitator.
6. Install new nipple on agitator. (A little moisture on nipple where agitator goes through will ease
the operation.)
7. Replace agitator through opening, positioning agitator on fan by turning fan so the bushing is
placed between forks on agitator.
8. Replace bushing and round-head machine screw that holds agitator to pivot plate.
9. Replace nipple in pivot hole.
TROUBLE SHOOTING
If motor will not run, turn switch to “Off” position and turn motor by hand to be sure that it turns freely.
Check ground, check fuse (this is a 20-amp fuse), check battery connections and battery, and then turn
switch to “On” position. The unit should run if the motor is not damaged. For erratic spread of fertilizer or
insecticides, check for lumps in material.
HERD SEEDER COMPANY, INC., LOGANSPORT, IN 46947
4
MODEL GT-77 PARTS LIST 8/7/07 10:29 AM Page 6

CHART FOR HERD BROADCASTER
GT-77
(Electric Motor Powered-Full Speed on 12 Volts)
Spread Amount Opening Speed Time Required
Material Width Per Acre Width MPH Per Acre
Clover, Alfalfa, 28’ 10# 1/8” 4 4 Min. 25 Sec.
and Sweet Clover 28’ 6.6# 1/8” 6 2 Min. 57 Sec.
28’ 5# 1/8” 8 2 Min. 13 Sec.
Bermuda Grass 22’ 9# 1/8” 6 3 Min. 45 Sec.
(Hulled) 22’ 6-3/4# 1/8” 8 2 Min. 49 Sec.
Set Base on H 22’ 5.4# 1/8” 10 2 Min. 15 Sec.
Kentucky 8’ 23# 5/16” 4 15 Min. 28 Sec.
Blue Grass 8’ 15-1/2# 5/16” 6 10 Min. 19 Sec.
8’ 11-12# 5/16” 8 7 Min. 44 Sec.
Rye Grass & 14’ 22# 7/8” 4 8 Min. 50 Sec.
Red Fescue 14’ 14-3/4# 7/8” 6 5 Min. 54 Sec.
14’ 11# 7/8” 8 4 Min. 25 Sec.
Red Top 10’ 17# 1/4” 4 12 Min. 23 Sec.
10’ 11# 1/4” 6 8 Min. 15 Sec.
10’ 8-1/2# 1/4” 8 6 Min. 11 Sec.
Highland Bent 10’ 18-1/2# 3/8” 4 12 Min. 23 Sec.
10’ 12# 3/8” 6 8 Min. 15 Sec.
10’ 9.2# 3/8” 8 6 Min. 11 Sec.
Switch Grass 24’ 5# 1/16” 10 2 Min. 4 Sec.
Fertilizer 24’ 62# 5/8” 4 5 Min. 9 Sec.
24’ 41# 5/8” 6 3 Min. 26 Sec.
24’ 31# 5/8” 8 2 Min. 35 Sec.
Nitrogen 18’ 82# 5/8” 4 6 Min. 53 Sec.
(Pelleted 45% 18’ 55# 5/8” 6 4 Min. 35 Sec.
Urea) 18’ 41# 5/8” 8 2 Min. 35 Sec.
CHART FOR BROADCASTING SEEDS AND FERTILIZER - MODEL GT-77
FIGURED AT 4 M.P.H.
SIZE SOWS PER
SEED OR MATERIAL OPENING ACRE WIDTH
Ammonium Nitrate ...................................... 3/8” 8 LBS. 24 FT.
Australian Pea.............................................. 3/8” 60 LBS. 34 FT.
Bahia Grass .................................................. 3/16” 19 LBS. 18 FT.
Brome Grass ................................................. 1/2” 11-1/2 LBS. 14 FT.
Flax and Millet ............................................. 1/4” 8-1/2 LBS. 30 FT.
Ladino Clover ............................................... 1/32” 1 LB. 28 FT.
Lespedeza...................................................... 3/16” 6 LBS. 28 FT.
Oats ............................................................... 1” 64 LBS. 26 FT.
Orchard Grass .............................................. 3/8” 9 LBS. 18 FT.
Rye................................................................. 1/2” 42 LBS. 32 FT.
Sweet Sudan Grass ...................................... 1/2” 20 LBS. 28 FT.
Timothy ......................................................... 3/16” 6 LBS. 26 FT.
Turnip Seed................................................... 1/4” 10 LBS. 26 FT.
Vetch.............................................................. 3/8” 40 LBS. 36 FT.
Wheat ............................................................ 1/2” 45 LBS. 32 FT.
5
DO NOT MEASURE
FROM TIP OF TEETH
SEEDGATE
MEASURE
FROM
HERE FOR
SETTING.
HERD SEEDER COMPANY, INC., LOGANSPORT, IN 46947
MODEL GT-77 PARTS LIST 8/7/07 10:29 AM Page 7

LIMITED WARRANTY
This Herd Broadcaster was thoroughly tested before it left the factory. We
warrant each Broadcaster sold by us to be free from defects in material and
workmanship when used according to our directions. Our obligation under
this warranty is limited to making good at the factory any defective part or
parts thereof which shall, within three months after delivery of such Herd
Broadcaster to the original purchaser, to be returned to us. No person or
company is authorized to make further warranty.
This warranty shall not apply to any Herd Broadcaster which shall have
been repaired or altered outside of our factory in any way so as to affect its
stability or reliability, nor which has been subject to misuse, negligence or
accidents, or was caused by damage while in possession of the consumer
or resulted from failure to the consumer to provide reasonable and
necessary maintenance.
DAVID E. HERD, President
HERD SEEDER CO., INC. - P.O. BOX 448 - LOGANSPORT, IN 46947
HERD SEEDER COMPANY, INC.
2383 South U.S. 35, P.O. Box 448
Logansport, Indiana 46947-0448
Phone: [phone]
Fax: [phone]
[e-mail]
Litho in U.S.A. Form GT-77-ATV (Rev. 7/07) HSEØØ1Ø-Ø5
MODEL GT-77 PARTS LIST 8/7/07 10:29 AM Page 8