Legend 780 User manual

OWNERS MANUAL



--
-! 
"#$%#
&#'''&
! '&$&(")
)(*+
,---*----./010230102.4.
--5-5-

CONTENTS
CONTENTS PAGE
Introduction............................................................................................................................................ 1
SAFETY INFORMATION
Safety Alert Symbol............................................................................................................................... 2
Safety Information ............................................................................................................................... 3-5
Safety Decals ......................................................................................................................................... 6
Tractor & Safety Pointers ...................................................................................................................... 7
ASSEMBLY INSTRUCTIONS
Attachin Loader ................................................................................................................................... 8
Attachin Bucket ................................................................................................................................... 9
Detachin Loader.................................................................................................................................. 10
Detachin Bucket………………………………………………………………………………………11
OPERATING INSTRUCTIONS
Operational............................................................................................................................................ 12
SERVICE AND MAINTENANCE
780 SL & NSL Specifications............................................................................................................. 13-14
Loader Inspection, Service, and Maintenance ...................................................................................... 15
780 SL Hydraulic System Parts List..................................................................................................... 16
780 SL Hydraulic System Parts Dia ram ............................................................................................. 17
780 NSL Hydraulic System Parts List .................................................................................................. 18
780 NSL Hydraulic System Parts Dia ram .......................................................................................... 19
780 NSL Loader Parts Dia ram............................................................................................................ 20
780 NSL Parts Identification Schedule............................................................................................... 21-22
780 SL Loader Parts Dia ram............................................................................................................... 23
780 SL Parts Identification Schedule.................................................................................................. 24-25
Euro Adapter Parts Dia ram…………………………………………………………………………..26
Euro Adapter Parts Identification Schedule………………………………………………………… 27
Bucket Parts Dia ram ........................................................................................................................... 28
Bucket Parts Identification Schedule .................................................................................................... 29
Multi-Faster & Accumulator Kit Parts Dia ram .................................................................................. 30
Multi-Faster & Accumulator Kit Parts Identification Schedule ........................................................... 31
Hydraulic Cylinder Information ........................................................................................................... 32
Hydraulics Information......................................................................................................................... 33
3 1/4” Cylinder Service Kit................................................................................................................... 34
Hydraulic Cylinder Parts List ............................................................................................................... 35
Hydraulic Cylinder Parts Dia ram........................................................................................................ 36
Piston and Gland Dia ram ................................................................................................................... 37
LIMITED WARRANTY INFORMATION
Limited Warranty.................................................................................................................................. 38
TORQUE SPECIFICATIONS
Torque Specifications ........................................................................................................................... 39

INTRODUCTION
Koyker Manufacturin Inc. has en ineered and manufactured a Le end Loader that includes the features
YOU want in a top-of-the-line loader, includin :
-Greaseless Pivot Connections
-Lar e Chrome Pivot Pins
-Bucket Linka e for Increased Roll Back An le and Force
-Euro Attachment System
-Dual Torque Tubes
-Rounded Back Bucket
-Soft Ride Nitro en Accumulator (Optional)
Koyker Manufacturin Inc. has created one of the best loaders in the market throu h consumer research,
product testin and by usin the latest technolo ical enhancements to deliver what you’ve been askin
for… a loader that will et the job done with ease.
TO THE PURCHASER
You have purchased an excellent product. With proper care and use, it will ive you years of ood safe
service. Use only KOYKER or KOYKER approved parts in the eneral maintenance and repair of your
equipment. Please fill o t ownership registration card as soon as possible.
Should you have any questions, comments, improvements, or su estions re ardin the contents of any of
the manuals provided, please contact Koyker Manufacturin Company. (800-456-1107 or E-mail
koyker@koykermf .com)
We care abo t yo r safety!
Remember ALL safety decals are no charge from the factory. Please replace all safety decals if
missing or damaged. Yo r safety is important to s.
Pa e 1

SAFETY ALERT SYMBOL
The symbol shown below is used to call your attention to instructions concernin your personal safety.
Watch for this symbol it points out important safety precautions. It means ATTENTION! Become Alert!
Yo r Personal Safety Is Involved!
Read the messa e that follows and be alert to the possibility of personal injury or death.
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 death or
serious injury.
CAUTION: Indicates a potentially hazardous situation that, if not avoided may result in minor or
moderate injury.
WARNING! Anyone who will operate or work around a front-end loader should first read
this manual.
Pa e 2

SAFETY
Improper use of a loader can cause serious injury or death. The followin safety precautions, and those
iven on the tractor mount installation instructions, should be thorou hly understood before attemptin to
operate this machine.
BEFORE OPERATING:
Carefully study and understand this manual, the specific tractor mount instructions, and the
attachment(s) manual(s).
Prior to operation, inspect the loader for system leaks and dama ed, missin , or malfunctionin
components in an effort to avoid the possibility of a dan erous failure involvin structural
members or hydraulic system components.
Be certain any repairs necessary are completed prior to loader operation.
Follow recommended maintenance procedures and precautions on Pa e 15.
Completely familiarize yourself and others involved with the operation of the hydraulic control
valve before operatin the loader.
Be certain all bystanders are clear of the machine and operation area prior to operation.
It may be necessary to add wheel ballast or rear wei hts as recommended by the tractor
manufacturer to maintain stability of the machine to prevent tippin or upset which could result in
serious injury or death. See mountin instructions for specific information.
It is recommended that both front and rear wheel treads be set to the widest recommended width to
prevent tippin or upset which could result in serious injury or death.
This loader is desi ned for farm type operations such as snow removal, barn and feedlot cleanin ,
li ht commercial or li ht radin and di in . It’s desi n is NOT intended for industrial use.
DURING OPERATION:
Never operate the machine other than from the tractor operator’s seat.
Be sure operatin area is clear of others durin machine operations.
Never lift, hoist, or carry humans in the bucket or on any portion of the loader or loader
attachments. Failure to heed, may result in serious injury or death.
Pa e 3

SAFETY CONTINUED
Transport the machine load at the slowest speed possible and with the loader boom at the lowest
transport position to avoid tippin or upsettin , which may result in serious injury or death.
Be extremely careful when workin on inclines or near loose fill, rocks, and holes as they can cause
tippin or upsettin which may result in serious injury or death.
Be certain to avoid overhead electrical wires when operatin loader. Contact with power lines may
cause serious injury or death.
Avoid sudden stops when lowerin or liftin the loader boom to prevent loss of control over the
machine and/or load, which may result in serious injury or death.
Use maximum ballast and the widest recommended wheel settin on your tractor when handlin
lar e shiftable loads.
Never attempt to ram with the bucket at hi h speed or full tractor power. Sudden impact may result
in structural failure and possible serious injury or death.
Never adjust or perform maintenance on the loader or tractor with the unit in motion, or without
power source locked out.
Never et under bucket or lift arms or reach throu h the lift arms or bucket linka e when the loader
is in operation. Inadvertent movement may cause serious injury or death.
FOLLOWING OPERATION:
Whenever the machine is not in operation, lower the loader boom and set the tractor brakes,
disen a e drive, shut the en ine off, and remove the i nition key before dismountin the tractor.
If loader is to be disen a ed from tractor, be sure the loader is securely supported on a hard, level
surface and the stand is securely en a ed. Be certain all connections between tractor and loader are
free before disen a in .
TRANSPORTING:
Use safety li hts and SMV emblem in addition to whatever local codes require when equipment is
bein transported on the road or hi hway. Check with proper authorities for le al limitations.
Transport all loads at a slow and safe speed.
Carry the load as low as possible and maintain adequate visibility and ood round clearance at all
times.
Pa e 4

SAFETY CONTINUED
PERFORMING MAINTENANCE:
Carefully review, understand, and follow the “maintenance” section in this owners manual before
attemptin to service loader.
Lower the bucket or attachment to the round, shut off tractor en ine, and relieve pressure in the
hydraulic system before adjustin , or servicin the loader.
Escapin hydraulic oil under pressure can penetrate the skin. Never use any part of your body to
check for hydraulic leaks. Use cardboard when checkin for leaks. See Fi . 5-1. Relieve hydrau-
lic pressure before disconnectin any hydraulic line. Failure to heed may result in serious injury or
death.
Before disconnectin hydraulic lines, lower the loader and attachments. Lock out the hydraulic
supply and relieve all hydraulic pressure.
Replace any dama ed or painted-over decals. See Pa e 6 for replacement decals.
REMEMBER:
1. Move Slowly!
2. Always use care and common sense!
3. Be careful for your own sake and for that of others!
4. Koyker Mf . Co. includes all reasonable means for accident prevention except a safe and
careful operator.
FIG. 5-1
Pa e 5

SAFETY DECALS
Pa e 6

The use of ood jud ment and common sense is necessary by the operator in usin this loader. The front
and rear wheels should be set for the widest wheel tread to assure best stability. Use extra caution when
rear wheel wei hts and tire ballast are added to a loader-equipped tractor. DO NOT ram into frozen dirt
piles, frozen manure piles, ice, etc., with reat momentum where sudden shock loads are encountered.
Serious and costly dama e may result to both the loader and the tractor.
When scrapin or back dra in do not extend the attachment cylinders more than one half of the
cylinder’s stroke. A limited amount of levelin may be done, when the loader valvin is arran ed with a
float control. This will prevent dama e to cylinder rods. Never ride in the bucket.
Before operatin the loader, be sure no one is standin near it. Only one person, the operator, should be on
the tractor. Remain at the controls and under no circumstances leave the tractor unattended with the bucket
in a raised position.
Never lift a person in the bucket or walk under a raised bucket.
Never drive your loader-equipped tractor down a hill that is steeper than 15 de rees. Carry all loads low
and use care on side hills.
Always keep unused PTO shaft clutch levers disen a ed.
Keep hands, feet, and clothin away from all movin parts.
Hydraulic oil, under pressure, can cause injury. Be sure that all connections are ti ht and that all pressure
is relieved before disconnectin any lines.
Care must be taken with your loader cylinders. Nicks, scratches, rust, or other shaft dama e can result in
worn packin causin cylinder leaka e and subnormal performance.
MOVE SLOWLY
USE COMMON SENSE
BE CAREFUL FOR YOUR OWN SAKE AND THAT OF OTHER PEOPLE
TRACTOR & SAFETY POINTERS
Pa e 7

ATTACHING LOADER
IMPORTANT:
Never attempt loader attachment on rades which are not reasonably level.
1. Check to be sure that the surfaces of the mounts are free of
obstructions. (Fi 8-1)
2. Drive the tractor slowly and carefully in between the loader arms
only far enou h to permit hook-up of the hydraulic system hoses.
(Fi . 8-2)
3. Once all hoses have been properly coupled drive the tractor forward
checkin to insure that the bottom mount shaft on each loader upri ht
clears the bottom cradle on each mount tower. (Fi . 8-3)
4. Allow the ali nment collars at the top of each upri ht to settle a ainst
the top cradle of each mount tower. (Fi . 8-3)
5. To lock the loader onto the mount, install the two 694997 – 1 1/2”
diameter mount pins into the outside of the upri ht throu h the mount
tower, and trap the mount pin with a 683912 lockpin on the outside of
each loader upri ht. (Fi . 8-3)
6. After both upri hts are secured to the mounts, raise the loader to
disen a e and store the loader stands with provided mount pins. (Fi
8-4) & (Fi 8-5)
7. Prior to operation, be certain to review all safety and operation
information contained within this manual.
Pa e 8
Fi 8-1
Fi 8-4Fi 8-5
Fi 8-3
Fi 8-2

ATTACHING BUCKET
Pa e 9
1. Prior to attachin the bucket, prepare the adapter for en a ement by pullin the adapter handle
back (towards the operator) into it’s cocked position. With the bucket positioned on level round,
tilt the bucket adapter forward approximately 45º. (Fi 9-1) Slowly drive forward into the bucket,
centerin the adapter with the bucket as you o and position the top mount bar of the adapter
just below the hooks on the back side of the bucket. (Fi 9-2) Slowly raise the loader payin
attention that both hooks are en a ed. With the top mount bar fully en a ed, slowly roll the
bucket back. The bottom mount bar of the adapter will come in contact with the bottom of the
bucket. (Fi 9-3) Continue to slowly roll bucket until the adapter handle comes in contact with its
stop and en a es itself with the bucket. (Fi 9-4) If the adapter handle does not come in contact
with its stop, lower the loader until it en a es.
Fi . 9-1
Fi . 9-2
Fi . 9-3 Fi . 9-4

DETACHING LOADER
Pa e 10
IMPORTANT:
Never attempt loader attachment on rades which are not reasonably level.
1. Raise loader frame sli htly to permit loader stand reen a ement.
(Fi . 10-1)
2. Lower bucket to round and tip sli htly forward to apply
pressure to mount connection. Note: This will prevent
the loader from inadvertently rockin forward when the mount
pins are removed and upri hts are disen a ed from it’s cradle.
(Fi . 10-2)
3. Remove the 683912 lockpin trappin the 694997 mount pin, and
remove this pin also. Store the 694997 mount pin in the hole in
the bottom of the upri ht. Replace the 683912 lockin pin into
it’s prior location. (Fi . 10-3)
4. Then tilt the bucket back to rotate the bottom mount shaft from
the mount tower cradle. Then tilt the bucket further back to rotate
the upri ht up and out of the mount tower, and into a stora e
position. (Fi . 10-4)
5. Before completely backin out, disconnect and store the loader
system hydraulic hoses. It is important that the hoses be properly
stored to keep the coupler as clean as possible.
(Fi 10-4)
IMPORTANT:
Never store the detached loader where insufficient soil
bearin capacity exists. Good firm clay or firmly packed dirt are
sufficient, providin the area is dry. If you are unsure, use
blockin under the stand foot to disperse the load. Failure to
heed, may allow the loader to settle and prevent attachment at
later date.
Fi 10-1
Fi 10-2
Fi 10-3
Fi 10-4

DETACHING BUCKET
Pa e 11
1. Prior to detachin the bucket, prepare the adapter for disen a ement by pullin the adapter han-
dle back (towards the operator) into its cocked position (Fi 11-1 & Fi 11-2). The bucket should be
restin on level round. Slowly lower and dump your way out of the bucket (Fi 11-3). Slowly back
away from the bucket until you are clear of the bucket and safe to maneuver (Fi 11-4).
Fi 11-1Fi 11-2
Fi 11-3 Fi 11-4

OPERATION
WARNING:
Never allow anyone to operate the loader until they have carefully reviewed and
understood this owners manual.
FILLING THE BUCKET:
When manure is piled on a slope, it is best to drive tractor up the slope strai ht into the pile. Operatin
sideways on a slope has a tendency to tip the loadin unit. Drive tractor strai ht into the pile, raise the
bucket about six inches, then drop bucket and drive forward until the bucket is filled. Tilt bucket
completely back, raise main frame and back away from manure pile.
DUMPING THE BUCKET:
When dumpin , brin the bucket to proper dumpin hei ht which is just hi h enou h so it will not strike
the spreader as the load is bein dumped. With the bucket tipped, drive tractor forward and raise the
bucket at the same time to distribute the load evenly into spreader or conveyance.
RAISING THE BUCKET:
WARNING:
Make sure material in bucket cannot spill out on to tractor when loader boom is raised.
Keep clear of overhead obstructions such as trees, limbs or power lines when raisin
the bucket.
Side cuttin is the best method of reducin lar e stockpiles. If the sides
of the pile are too hi h, use the loader to pull them down and reduce the
possibility of slides.
Make s re yo keep all lines, cylinders, and complete hydra lic system free of all sand, dirt, and
foreign matter. Use only clean oil in the hydra lic system. When removing the loader from the
tractor, be s re to pl g all open ports. If the loader will be o t of service for several days or longer,
grease the exposed polished piston shafts on the b cket and the lift cylinders.
WARNING:
NEVER attempt to operate the loader with someone near the loader frame or bucket.
If this loader is eq ipped with a Grapple fork, be s re Grapple teeth are closed before
leaving seat of tractor.
Pa e 12

KOYKER LEGEND 780 SL LOADER SPECIFICATIONS
Description of Eq ipment Rated
Loader Model...................................................................................................................780 SL
Attachment Adapter & Bucket Size..................................................................................... 6’
Rated Flow ......................................................................................................................25 GPM
Maximum Pressure ........................................................................................................ 2500 PSI
Lift Cylinder Dia.......................................................................................................... 3 1/4” Bore
Attachment Cylinder Dia. ............................................................................................ 3 1/4” Bore
Tractor Horsepower Ran e ........................................................................................... 90-180 HP
Dimensional Specifications
(A) *Maximum Lift Hei ht to Pivot Pin.......................................................................... 13’ 9”
(B) *Lift Hei ht under Level Bucket.............................................................................. 12’ 11”
(C) *Clearance with Bucket Fully Dumped..................................................................... 10’ 8”
(D) *Reach at Maximum Lift Hei ht................................................................................ DNA
(E) Maximum Dump An le ................................................................................................ 46°
(F) *Reach with Bucket on Ground .................................................................................. DNA
(G) Maximum Rollback An le ........................................................................................... 31°
(H) *Di in Depth ............................................................................................................. 5”
(J) *Overall Hei ht in Carry Position ............................................................................... 7’ 2”
Operational Specifications
(U) *Lift Capacity to Maximum Hei ht at Pivot Pin .................................................... 5067 lbs.
(V) *Lift Capacity to Maximum Hei ht 31.5” Forward of Pivot Pin............................ 3527 lbs.
(Y) *Breakout Force at Ground Line at Pivot Pin ......................................................... 6802 lbs.
(Z) *Breakout Force at Ground Line 31.5” Forward of Pivot Pin................................. 5059 lbs.
*Raisin Time................................................................................................................ 5 seconds
*Lower Time.................................................................................................................. 3 seconds
*Attachment Dumpin Time ......................................................................................... 4 seconds
*Attachment Rollback Time ..........................................................................................3 seconds
*Specifications based on ASABE standards S301.3 (Front-End A ricultural Loader Ratin s) The above
information is based on testin done by Koyker Mf . Variations in maximum lift hei ht and other specs for
different tractors are due to tire sizes, variations in loader mountin locations and hydraulic system
efficiency.
Specifications are subject to chan e without notice and without liability therefore.
Pa e 13
SPECIFICATIONS

KOYKER LEGEND 780 NSL LOADER SPECIFICATIONS
Description of Eq ipment Rated
Loader Model................................................................................................................. 780 NSL
Attachment Adapter & Bucket Size............................................................................... 6’ Bucket
Rated Flow ......................................................................................................................25 GPM
Maximum Pressure ........................................................................................................ 2500 PSI
Lift Cylinder Dia.......................................................................................................... 3 1/4” Bore
Attachment Cylinder Dia. ............................................................................................ 3 1/4” Bore
Tractor Horsepower Ran e ........................................................................................... 90-180 HP
Dimensional Specifications
(A) *Maximum Lift Hei ht to Pivot Pin.......................................................................... 13’ 5”
(B) *Lift Hei ht under Level Bucket............................................................................... 12’ 7”
(C) *Clearance with Bucket Fully Dumped..................................................................... 10’ 5”
(D) *Reach at Maximum Lift Hei ht................................................................................ DNA
(E) Maximum Dump An le ................................................................................................ 48°
(F) *Reach with Bucket on Ground .................................................................................. DNA
(G) Maximum Rollback An le ........................................................................................... 36°
(H) *Di in Depth ..........................................................................................................7 1/2”
(J) *Overall Hei ht in Carry Position ............................................................................... 6’ 5”
Operational Specifications
(U) *Lift Capacity to Maximum Hei ht at Pivot Pin .................................................... 5216 lbs.
(V) *Lift Capacity to Maximum Hei ht 31.5” Forward of Pivot Pin............................ 3607 lbs.
(Y) *Breakout Force at Ground Line at Pivot Pin ......................................................... 5757 lbs.
(Z) *Breakout Force at Ground Line 31.5” Forward of Pivot Pin................................. 4500 lbs.
*Raisin Time................................................................................................................ 5 seconds
*Lower Time.................................................................................................................. 3 seconds
*Attachment Dumpin Time ......................................................................................... 4 seconds
*Attachment Rollback Time ..........................................................................................3 seconds
*Specifications based on ASABE standards S301.3 (Front-End A ricultural Loader Ratin s) The above
information is based on testin done by Koyker Mf . Variations in maximum lift hei ht and other specs for
different tractors are due to tire sizes, variations in loader mountin locations and hydraulic system
efficiency.
Specifications are subject to chan e without notice and without liability therefore.
Pa e 14
SPECIFICATIONS

LOADER INSPECTION, SERVICE, AND MAINTENANCE
Lower the bucket to the round, shut off tractor en ine, and relieve the pressure in the hydraulic
system before adjustin , lubricatin , or servicin the loader.
Periodically check all bolts for looseness and re-torque if necessary.
Before stora e, be certain all hydraulic cylinders are fully collapsed so that the rod will not be
exposed to the elements or dama ed.
Be certain hydraulic system remains sealed at all times to prevent contamination.
Check and maintain an adequate fluid level in the tractor reservoir prior to use.
Inspect all hydraulic system hoses and fittin s. Replace prior to further operation if dama ed.
Periodically inspect the two rease fittin s for the en a ement pins. See pa e 21 for adapter break
parts dia ram.
WARNING!
Escapin hydraulic oil under pressure can penetrate the skin. Never use body to
check for hydraulic leaks. Use cardboard when checkin for leaks. See Fi . 13-1.
Relieve hydraulic pressure before disconnectin any hydraulic line. Failure to heed may result in serious
injury or death.
Pa e 15
FIG. 13-1

  & 6!
1679260 3 1/4" LIFT CYLINDER 2
2680735 3 1/4' BUCKET CYLINDER 2
3679760A 1ST OIL LINE (A 1
4679761A 2ND OIL LINE (A 1
5679762A 3RD OIL LINE (A 1
6679763A 4TH OIL LINE (A 1
7679760B 1ST OIL LINE (B 1
8679761B 2ND OIL LINE (B 1
9679762B 3RD OIL LINE (B 1
10 679763B 4TH OIL LINE (B 1
11 663508 HYDRAULIC ADAPTER 8MJX - 8MJX 1
12 679627 CROSS PORT RELIEF 1
13 679765 49" HYDRAULIC LINE HOSE 2
14 663188 18" HYDRAULIC HOSE 2
15 673799 20" HYDRAULIC HOSE 2
16 679764 29" HYDRAULIC LINE HOSE 2
780 SL HYDRAULIC SYSTEM PARTS LIST
Pa e 16

780 SL HYDRAULIC SYSTEM PARTS DIAGRAM
Pa e 17

  & 6!
1679260 3 1/4" LIFT CYLINDER 2
2680735 3 1/4' BUCKET CYLINDER 2
3679444 1ST OIL LINE 1
4679445 2ND OIL LINE 1
5679446 3RD OIL LINE 1
6679447 4TH OIL LINE 1
7670417 30" HYDRAULIC HOSE 2
8663188 18" HYDRAULIC HOSE 2
9673799 20" HYDRAULIC HOSE 2
10 681209 24" HYDRAULIC HOSE 2
11 663508 HYDRAULIC FITTING ADAPTER 8MJX-8MJX 2
780 NSL HYDRAULIC SYSTEM PARTS LIST
Pa e 18