K-Hart 8612 User manual

December 2019 1
8612 Opener
Owner’s Manual
Rev. 0
02-Dec-2019
Box 520
Elrose, Saskatchewan S0L 0Z0
Canada
Ph: [phone]
Fax: [phone]
E-mail:[email protected]
www.khartindustries.com
K
-HART
INDUSTRIES LTD.

2 December 2019
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December 2019 3
Contents
Safety ..........................................................................................................4
Warranty ......................................................................................................7
Specifications................................................................................................8
Operation .....................................................................................................9
Maintenance ............................................................................................... 13
Assembly and Parts ..................................................................................... 14
General............................................................................................. 14
8612 Opener—Major Sub-Assemblies and Weldments........................... 16
679550: 8612 Opener Assembly, Right................................................ 18
679555: 8612 Opener Assembly, Left.................................................. 20
679650: 8612 Opener Assembly, Right—RST ....................................... 22
679655: 8612 Opener Assembly, Left—RST ......................................... 24
278310: Spring Assembly ................................................................... 26
278280: Spring Base Assembly ........................................................... 28
678250: Gent Opener Assembly, Right ................................................ 30
678255: Gent Opener Assembly, Left .................................................. 32
678260: Gent Opener Assembly, Right—RST ....................................... 34
678265: Gent Opener Assembly, Left—RST ......................................... 36
678400: Paralink Linkage Assembly..................................................... 38
268020: 17” Disc Assembly ................................................................ 40
268025: 14.8” Disc Assembly.............................................................. 42
Wheels ............................................................................................. 44
Notes ........................................................................................................ 46

4 December 2019
Safety
Tractor Operation
General Operation
 Be aware of tractor safety procedure when working with an air drill.
 Review tractor manuals.
 Secure hitch pin with a retainer and lock drawbar in centre position.
 DO NOT RIDE!! No one should be allowed to ride on the air drill when in motion.
 No one but the operator in the driver’s compartment.
 Check behind when backing up.
 Reduce speed when working in hilly terrain.
 Never allow anyone within the immediate area when working.
 Stand clear when raising or lowering wings.
SAFETY-ALERT
SYMBOL Watch for this symbol. It Identifies potential hazards to health
or personal safety. It means:
ATTENTION—BE ALERT
Your Safety is Involved
Familiarize yourself with the location of all decals. Read them
carefully to understand the safe operation of your machine.
Three words are used in conjunction with the safety– alert symbol:
DANGER
Indicates an imminently hazardous situation
that, if not avoided, will result in death or
serious injury.
WARNING
Indicates a potentially hazardous situation
that, if not avoided, could result in serious
injury or death.
CAUTION
Indicates a potentially hazardous situation
that, if not avoided, may result in minor or
moderate injury.

December 2019 5
Safety
Transporting Operation
Maintenance
Hydraulics
Storage
 When transporting be aware of length, height, and width. Make turns carefully and be aware
of obstacles and overhead electrical lines.
 When transporting machine adhere to recommended safe speed. DO NOT EXCEED 20 MPH.
 Do not transport in poor visibility.
 When transporting, be sure transport lock pins are in locking position.
 The slow moving vehicle (SMV) emblem and safety reflectors must be secured on the machine
for safe transport
 Check that wings are firmly seated in transport wing stops and lock pins installed.
 Avoid soft surfaces. The additional wing weight on the centre wheels could cause the machine
to sink.
 Ensure safety chain is attached correctly.
 Shut the tractor off before making any adjustments or lubricating the machine.
 Block machine securely when making repairs.
 Wear close-fitted clothing.
 Do not modify the machine.
 Do not search for high pressure hydraulic leaks without hand and face protection. A tiny,
almost invisible leak can penetrate the skin, requiring immediate medical attention.
 Use cardboard or wood to detect leaks, never your hands!
 Double check that all is clear before operating hydraulics.
 Never remove hoses or hose ends with machine elevated. Ensure all pressure is off of lines to
be disassembled.
 Maintain proper hydraulic fluid levels.
 Keep all connectors clean for positive connections.
 Ensure all fittings and hoses are in good repair.
 Do not stand under wings.
 Store air drill away from areas of main activity.
 Level air drill and block up securely to relieve pressure on jack.
 Do not allow children to play on or around air drill.

6 December 2019
Safety
Familiarize yourself with the location of all decals. Read them carefully to understand the
safe operation of your machine. If any decals become damaged or missing, contact your
dealer immediately for a replacement.

December 2019 7
Warranty
K-Hart’s objective is to insure that all owners obtain maximum reliability and performance
from all K-Hart products.
K-Hart Industries warrants your K-Hart products to be free of defects in material and
workmanship, under normal use and service. Obligations under this warranty shall extend for
a period of 1 year following the date of delivery to the original purchaser and shall be limited
to, at the option of K-Hart Industries, replacement or repair of any parts found, upon
inspection by K-Hart, to be defective.
K-Hart Industries reserves the right to make changes or add improvements at any time
without notice or obligation.
Warranty claims
The purchaser claiming under this warranty shall report a warranty claim to his Authorized
dealer.
Exclusions and/or Deviations from the Base Warranty
 K-Hart does not cover any warranty on the frame tires. Any warranty has to be dealt with
by the Original Tire Manufacturer.
 K-Hart does not cover any nicks, cuts, or other marks on the frame tires that occur during
delivery.
 Rubber packer wheels, when used in excessively rocky conditions and will not be
warranted against cuts, scrapes, and abrasions.
 Limitation of Liability. In no event shall the owner be entitled to recover for incidental,
special or consequential damages such as, but not limited to, loss of crops, loss of profits
or revenue, other commercial losses, inconvenience or cost of rental or replacement.
 Normal wear, repair and maintenance not related to defects. The expressed
warranty does not cover wear of components, and is conditional upon the product being
properly assembled, adjusted, and operated under normal farming conditions.
This warranty does not cover conditions resulting from misuse, negligence, unauthorized
alterations, accident, or lack of performance of required maintenance.
Owner’s Obligation
Warranty Transportation Costs. It is the responsibility of the owner, at the owner’s
expense, to transport the equipment to the service shop ofanauthorized K-Hart dealer
or alternately for any travel or transportation expense involved in fulfilling this warranty.

8 December 2019
Specifications
10” Spacing
Width
(ft) Sections
Number of
Openers
Approximate Weight base unit (lbs)*
Frame Openers Total
34 3 40 10300 7060 17360
42 3 52
(9.75” spacing)
10700 9180 19880
50 3 60 16250 10590 26840
56 5 66 20700 11300 32000
66 5 80 21300 13770 35070
76 5 90 21700 15530 37230
Width
(ft) Sections
Number of
Openers
Approximate Weight base unit (lbs)*
Frame Openers Total
34 3 34 10300 6000 16300
42 3 42 10700 7410 18110
50 3 50 16250 8830 25080
56 5 56 20700 9530 30230
66 5 66 21300 11470 32770
76 5 76 21700 13060 34760
12” Spacing
*Weights are approximate and will vary depending on options selected.
Additional weight can be added.
All specifications are subject to change without notification.

December 2019 9
Hitching
 Insure your hitch pin is in good condition.
 Position air drill clevis with tractor drawbar using hitch jack.
 After tractor to air drill connection is made, relieve pressure off the hitch jack.
 Pull jack pin. Swing hitch jack parallel to hitch pole and re-pin jack.
 Connect safety chain.
Operation
Hydraulics
 Ensure quick couplers are dirt free.
 Dirt in the hydraulic system could damage o-rings, causing leakage, pressure loss,
and total system failure!
 Inspect all fittings and hoses for leaks, bends, or kinks.
 Connect the four hydraulic lines. Be sure the wing and depth hoses are matched and
connected to the correct valve.

10 December 2019
Operation
Operation
 Make sure that the wheel bolts on the main center
frame and the wings are tightened after the first 5 km
and then after the next 10 km and the next 20 km
during the first few hours of use or transporting.
After the initial use, check wheel bolts every 40 hours
of operation.
 Initial leveling should be done on a flat, level surface, similar to that of a concrete floor.
 Using selector valve, select leveling cylinder operation
and level frame from front to back.
With frame level, close lock valve.
 Switch selector valve back to wing fold/unfold
operation.
 Level the wings using the 1 1/8” threaded rod that is
located on the end of the frames attached to the wing
wheel module.
 Ensure the unfold cylinders are fully extended so the
rod end is ½ way in the slot. This allows full travel of
wing members in uneven terrain. Not fully extending
cylinders will cause stress on frame and cylinders
and may do damage to your equipment.
Leveling
•When in field mode always run tractor hydraulics
for the wing cylinders in the float position.

December 2019 11
Operation
Height Adjustment
 The height of the frame is controlled by a series of
donuts located on the lift cylinders on the center
frame. IMPORTANT: Simply add or remove the
donuts to set the height, making sure both cylinders
are set the same. This will prevent the rear rockshaft
from twisting due to one cylinder traveling farther than
the other.
 Unused donuts can be stored over 5/8” bolt.
Transporting
 Use safety locks on main frame and wings when transporting!
 Do not walk under wings when raised or lowered. Ensure cylinders are completely filled
with hydraulic fluid. Entrapped air or hydraulic system failure could cause wings to fall
rapidly causing serious injury or death.
 Never exceed 20 mph (32 kph) in transport.
Transport Main Frame Lock Transport Wing Lock
 Wing lock pins are to be removed from storage location and placed securely in position when
transporting or working under or near the machine.
 Main frame locks are to be used also when transporting or working under or near machine.
 Lift machine to the full up position, remove the 3/8” bent handle pin, push transport safety
arm under cylinder and reinstall 3/8” bent handle pin in position. Both LH & RH cylinder locks
need to be in place. If only one safety lock is used, and there is hydraulic oil seepage, this may
twist the main frame rockshaft.

12 December 2019
Operation
Setting Openers
 By adjusting the main tension spring, you will increase the penetrating force of the opener.
Moving the bottom of the disc pressure spring towards the rear increases down pressure.
Moving the bottom of the disc pressure spring forward towards the tractor decreases down
pressure.
 The depth stop cam limits the amount of travel the disk opener can penetrate the soil and can
also affect packing pressure. Adjustments to the cam can be made bypushing in the shaft and
moving to the next gear. This adjustment is in ¼” increments.
 Travel speed will affect disc penetration and varies upon soil condition, type, and depth of
seeding.
 Depth of seeding and packing pressure is related to what height you are operating the frame
with the depth stop donuts.

December 2019 13
Maintenance
Use safety lock pins when doing any maintenance on the machine!
Daily or every 10 hours
 Grease rear rockshaft.
Weekly or every 50 hours
 Check for and tighten loose wheel bolts.
 Check tire pressure. Tires should be maintained at a pressure of 105 psi.
 Inspect all hinge pins to ensure they are in place.
 Inspect hydraulic system for leaks, damaged hoses, and loose fittings.
Annually or every 200 hours
 Grease main wheel hubs.
 Check for any cracked or broken welds.
 Check for and tighten loose wheel bolts.
 Check tire pressure.
 Inspect all hinge pins to ensure they are in place.
 Inspect hydraulic system for leaks, damaged hoses, and loose fittings.
Frame
Openers
Annually or every 100 hours
 Grease opener hubs.
 Grease opener pivot arm pin.
 Ensure that all spindle bolts are tight.
 Check for any other loose hardware.
 Check inner blade clearance and remove shims if required. Discs should just touch. Use
anti-seize on spindle when replacing so that it is easy to remove the next time.
 Adjust mud scraper clearance.
 Oil blades after the season if desired to keep them from rusting.
 Change blades if diameter is small enough that performance is compromised.
 When installing new blades, ensure that ample anti-seize is placed on disk hub spindle for
easy removal next time hubs are removed.

14 December 2019
Assembly and Parts
General
 Assembly procedure is shown in the following pages. Assembly and parts are shown for
all coulter systems and options. Your system may not have all the illustrated parts.
 Tighten all bolts to the torques shown in the following table unless otherwise
instructed. All u-bolts should be torqued to the Grade 5 specification.
 Lubricate all bearings and moving parts as assembled.
Bolt Torque Chart
Grade 5 Grade 8
ft*lbs N*m ft*lbs N*m
1/4 8 11 12 16
5/16 17 23 24 33
3/8 30 41 45 61
7/16 50 68 70 95
1/2 75 102 105 142
9/16 110 149 155 210
5/8 150 203 210 285
3/4 270 366 375 508
7/8 395 536 610 827
1 590 800 910 1234
Bolt Size

December 2019 15
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16 December 2019
Assembly and Parts
8612 Opener—Major Sub-Assemblies and Weldments

December 2019 17
Assembly and Parts
8612 Opener—Major Sub-Assemblies and Weldments
Item Part No Rev Description Qty
1 678400 0 PARALINK LINKAGE ASSEMBLY 1
2 678250
678255
678260
678265
2
2
2
2
GENT OPENER ASSEMBLY, RH
GENT OPENER ASSEMBLY, LH
GENT OPENER ASSEMBLY, RH—RST
GENT OPENER ASSEMBLY, LH—RST
1
1
1
1
3 677610
667613
677630
677633
2
2
2
2
PACKER ARM WELDMENT, RH—RST
PACKER ARM WELDMENT, LH—RST
OFFSET PACKER ARM WELDMENT, RH
OFFSET PACKER ARM WELDMENT, LH
1
1
1
1
4 667280
677283
2
1
MOUNT WELDMENT, RH
MOUNT WELDMENT, LH
1
1
5 WO214VT 1 PACKER WHEEL, 2 X 14 VT CMPLT 1
****DO NOT OVERTIGHTEN BOLTS****
Tighten to Grade 5 Torque Specifications Pg-15

18 December 2019
Assembly and Parts
679550: 8612 Opener Assembly, Right

December 2019 19
Assembly and Parts
679550: 8612 Opener Assembly, Right
Item Part No Rev Description Qty
1 678400 0 PARALINK LINKAGE ASSEMBLY 1
2 678250 0 GENT OPENER ASSEMBLY, RH 1
3 677630 0 OFFSET PACKER ARM WELDMENT, RH 1
4 677605 2 PACKER PIVOT PIN 1
5 677280 0 MOUNT WELDMENT, RH 1
6 677270 2 PIVOT PIN 1
7 497110 1 CAM, RIGHT 1
8 496010 4 SPRING 1
9 493142 2 CAM STOP SHAFT 1
10 493120 1 PACKER WHEEL SPACER 1
11 316001 0 BUSHING, 1 ID X 1-1/4 LG, BLACK 2
12 277265 2 PIVOT PIN 2
14 WO214VT 1 PACKER WHEEL, 2 X 14 VT CMPLT 1
15 HPL0424 0 HITCH PIN W/ LOCK, 1/4 X 6 1
16 RP0406 0 ROLL PIN 1/4 X 1-1/2 2
17 SB1020C5P 0 BOLT, HEX, 5/8 UNC X 5 GR5 PL 1
18 SB0606CP 0 BOLT, 3/8 UNC X 1-1/2 PL W/ 1/2 THREAD 3
19 SB0604C5P 0 BOLT, HEX, 3/8 UNC X 1 GR5 PL 1
20 SCS0404C 0 BOLT, SOCKET HEAD, 1/4 UNC X 1 1
21 LS10CBP 0 LOCKNUT, STOVER 5/8 UNC GRB PL 1
23 LSF04CFP 0 LOCKNUT, FLANGED, 1/4 UNC GRF 1
25 WF0602019P 0 WASHER, HEAVY, 3/8 PL 4
13 276222 2 BUSHING, 1ID X 1-1/4 LG, WHITE 4
22 LSF06CCP 0 LOCKNUT, STOVER, 3/8 UNC GRC 4
24 WF1632134P 0 WASHER, 1 SAE PL 1
26 WL06P 0 WASHER, LOCK 3/8 PL 3
****DO NOT OVERTIGHTEN BOLTS****
Tighten to Grade Torque Specifications Pg-15

20 December 2019
Assembly and Parts
679555: 8612 Opener Assembly, Left