Legend 780 Owner'S Manual Download

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OWNERS MANUAL

MANUAL NO.
698249

780 LOADER

Self

Leveling & Non Self

Leveling

IMPORTANT

KOYKER DEALER

BE SURE THIS MANUAL IS GIVEN TO THE

PURCHASER FOR FUTURE REFERENCE

KOYKER MANUFACTURING CO., P.O. BOX 409

LENNOX, SD 57039

Phone 1

800

456

1107 E

mail [email protected]

11/18/21

Summary of Contents for 780

Page 1: ...OADER Self Leveling Non Self Leveling IMPORTANT KOYKER DEALER BE SURE THIS MANUAL IS GIVEN TO THE PURCHASER FOR FUTURE REFERENCE KOYKER MANUFACTURING CO P O BOX 409 LENNOX SD 57039 Phone 1 800 456 1107 E mail koyker koykermfg com 11 18 21 ...

Page 2: ...draulic System Parts Diagram 19 780 NSL Loader Parts Diagram 20 780 NSL Parts Identification Schedule 21 22 780 SL Loader Parts Diagram 23 780 SL Parts Identification Schedule 24 25 Euro Adapter Parts Diagram 26 Euro Adapter Parts Identification Schedule 27 Bucket Parts Diagram 28 Bucket Parts Identification Schedule 29 Multi Faster Accumulator Kit Parts Diagram 30 Multi Faster Accumulator Kit Par...

Page 3: ...r what you ve been asking for a loader that will get the job done with ease TO THE PURCHASER You have purchased an excellent product With proper care and use it will give you years of good safe service Use only KOYKER or KOYKER approved parts in the general maintenance and repair of your equipment Please fill out ownership registration card as soon as possible Should you have any questions comment...

Page 4: ... 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 Anyon...

Page 5: ...perating 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 weights as recommended by the tractor manufacturer to maintain stability of the machine to prevent tipping or upset which could result in serious injury or death See mounting instructions for specific information It is recommended that both f...

Page 6: ... 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 get under bucket or lift arms or reach through the lift arms or bucket linkage 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 ...

Page 7: ...aulic leaks Use cardboard when checking for leaks See Fig 5 1 Relieve hydrau lic pressure before disconnecting any hydraulic line Failure to heed may result in serious injury or death Before disconnecting hydraulic lines lower the loader and attachments Lock out the hydraulic supply and relieve all hydraulic pressure Replace any damaged or painted over decals See Page 6 for replacement decals REME...

Page 8: ...SAFETY DECALS Page 6 ...

Page 9: ... operating the loader be sure no one is standing 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 degrees Carry all loads low and ...

Page 10: ...radle on each mount tower Fig 8 3 4 Allow the alignment collars at the top of each upright to settle against the top cradle of each mount tower Fig 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 upright through the mount tower and trap the mount pin with a 683912 lockpin on the outside of each loader upright Fig 8 3 6 After both upr...

Page 11: ...e top mount bar of the adapter just below the hooks on the back side of the bucket Fig 9 2 Slowly raise the loader paying attention that both hooks are engaged With the top mount bar fully engaged slowly roll the bucket back The bottom mount bar of the adapter will come in contact with the bottom of the bucket Fig 9 3 Continue to slowly roll bucket until the adapter handle comes in contact with it...

Page 12: ...ing pin into it s prior location Fig 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 upright up and out of the mount tower and into a storage position Fig 10 4 5 Before completely backing out disconnect and store the loader system hydraulic hoses It is important that the hoses be properly stored to keep t...

Page 13: ...ter han dle back towards the operator into its cocked position Fig 11 1 Fig 11 2 The bucket should be resting on level ground Slowly lower and dump your way out of the bucket Fig 11 3 Slowly back away from the bucket until you are clear of the bucket and safe to maneuver Fig 11 4 Fig 11 1 Fig 11 2 Fig 11 3 Fig 11 4 ...

Page 14: ... 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 raising the bucket Side cutting is the best method of reducing large stockpiles If the sides of the pile are too high use the loader to pull them down and reduce the possibil...

Page 15: ...ational Specifications U Lift Capacity to Maximum Height at Pivot Pin 5067 lbs V Lift Capacity to Maximum Height 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 Raising Time 5 seconds Lower Time 3 seconds Attachment Dumping Time 4 seconds Attachment Rollback Time 3 seconds Specifications bas...

Page 16: ...5 Operational Specifications U Lift Capacity to Maximum Height at Pivot Pin 5216 lbs V Lift Capacity to Maximum Height 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 Raising Time 5 seconds Lower Time 3 seconds Attachment Dumping Time 4 seconds Attachment Rollback Time 3 seconds Specificatio...

Page 17: ...ns 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 fittings Replace prior to further operation if damaged Periodically inspect the two grease fittings for the engagement pins See page 21 for adapter break parts diagram WARNING Escaping hydraulic oil under pressure can penetrate the ...

Page 18: ...6 679763A 4TH OIL LINE A 1 7 679760B 1ST OIL LINE B 1 8 679761B 2ND OIL LINE B 1 9 679762B 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 Page 16 ...

Page 19: ...780 SL HYDRAULIC SYSTEM PARTS DIAGRAM Page 17 ...

Page 20: ...79444 1ST OIL LINE 1 4 679445 2ND OIL LINE 1 5 679446 3RD OIL LINE 1 6 679447 4TH OIL LINE 1 7 670417 30 HYDRAULIC HOSE 2 8 663188 18 HYDRAULIC HOSE 2 9 673799 20 HYDRAULIC HOSE 2 10 681209 24 HYDRAULIC HOSE 2 11 663508 HYDRAULIC FITTING ADAPTER 8MJX 8MJX 2 780 NSL HYDRAULIC SYSTEM PARTS LIST Page 18 ...

Page 21: ...780 NSL HYDRAULIC SYSTEM PARTS DIAGRAM Page 19 ...

Page 22: ...KOYKER LEGEND 780 NSL LOADER PARTS DIAGRAM Page 20 ...

Page 23: ...1 16 679789 3 25 4 125 HOSE CLAMP 1 17 679272 1 1 2 X 6 1 4 PIN WLDT 2 18 679256 1 3 8 X 7 1 2 PIN WLDT FLAT 4 19 678245 1 1 2 X 7 1 2 PIN WLDT 4 20 679471 1 3 8 X 6 1 4 PIN WDLT 2 21 694997 MOUNT PIN WELDMENT 2 22 661983 MOUNT PIN WELDMENT 2 23 666941 SERIAL NUMBER DECAL 1 24 666943 HYDRAULIC PRESSURE DECAL 5 25 666944 WARNING DECAL 1 26 666945 DANGER DECAL 1 27 666946 WARNING DECAL 2 28 689639 L...

Page 24: ... SCREW 4375 14 X 1 5 FHHC 2 45 640049 SCREW 4375 14 X 1 25 GR 5 HHC 8 46 676797 SCREW 3125 18 X 2 50 HHSLDR 5 47 640039 SCREW 375 16 X 2 50 GR 5 HHC 1 48 682857 NUT 438 X 14 FLANGE 14 49 162279 SCREW 625 11 X 5 00 GR 5 HHC 4 50 666579 NUT 625 11 GR 2 LOCK NYLON INSERT 4 51 640154 WASHER 3 8 FLAT 6 52 654121 NUT 375 16 GR 2 LOCK NYLON INSERT 3 53 640152 WASHER 5 16 FLAT 4 54 689070 7 EURO BUCKET AS...

Page 25: ...KOYKER LEGEND 780 SL LOADER PARTS DIAGRAM Page 23 ...

Page 26: ...INC 1 17 679709 INDICATOR ROD WLDT ZINC COATED 1 18 694997 MOUNT PIN WLDT 2 19 678243 1 3 8 X 7 1 2 PIN WLDT 8 20 678245 1 1 2 X 7 1 2 PIN WLDT 4 21 679272 1 1 2 X 6 1 4 PIN WLDT 2 22 679256 1 3 8 X 7 1 2 PIN WLDT FLAT 4 23 661983 MOUNT PIN WLDT 2 24 666941 SERIAL NUMBER DECAL 1 25 666943 HYDRAULIC PRESSURE DECAL 5 26 666944 WARNING DECAL 1 27 666945 DANGER DECAL 1 28 666946 WARNING DECAL 2 29 689...

Page 27: ... 4375 14 X 1 25 GR 5 HHC 12 48 682857 NUT 438 X 14 FLANGE 16 49 680743 SCREW 375 16 X 2 50 GR 5 HHT 1 50 640154 WASHER 3 8 FLAT 6 51 654121 NUT 375 16 GR 2 LOCK NYLON INSERT 3 52 162279 SCREW 625 11 X 5 00 GR 5 HHC 4 53 666579 NUT 375 11 GR 2 LOCK NYLON INSERT 4 54 640152 WASHER 5 16 FLAT 4 55 681165 CLEVIS PIN 3 4 DIA X 2 2 56 679627 CROSS OVER MANIFOLD ASSEMBLY 1 57 679789 3 25 4 125 HOSE CLAMP ...

Page 28: ...EURO GLOBALADAPTER PARTS DIAGRAM Page 26 ...

Page 29: ... MEMBER WLDT 1 5 679316 EURO ATTACHMENT WLDT 1 6 657632 ZERK 1 4 28 GREASE 2 7 640032 SCREW 375 16 X 1 25 GR 5 HHC 4 8 680761 CLEVIS PIN 5 X 1 5 2 9 640154 WASHER 3 8 FLAT 4 10 654121 NUT 375 16 GR 2 LOCK NYLON INSERT 4 11 680767 COMPRESSION SPRING 1 12 660638 NUT 500 13 GR 2 LOCK NYLON INSERT 1 13 678248 1 3 8 X 7 7 8 PIN WLDT 2 14 678249 1 1 2 X 7 7 8 PIN WLDT 2 15 680768 COTTER PIN 156 X 1 50 3...

Page 30: ...BUCKET PARTS DIAGRAM Page 28 ...

Page 31: ... Bucket ITEM NO PART NO DESCRIPTION QTY 1 689074 8 EURO BUCKET WELDMENT 1 2 672848 8 BOLT ON BUCKET BLADE PAINTED 1 3 672852 BUCKET CLEVIS 1 4 673286 SLING LINK 1 5 673366 SCREW 625 11 X 2 00 GR 5 PH 13 6 640159 WASHER 5 8 SPRING LOCK 13 7 640142 NUT 625 11 GR 5 HEX 13 8 672981 WARNING DECAL 1 ITEM NO PART NO DESCRIPTION QTY 1 699075 8 6 EURO BUCKET WELDMENT 1 2 679772 8 6 BOLT ON BUCKET BLADE PAI...

Page 32: ...eel squishy or soft 1 Mount the loader Relieve any pressure in hydraulic lines before disconnecting Install multi faster and kit as shown 2 Locate the lift curcuit bottom steel line on the loader Disconnect the hose from the steel hydraulic line 3 Install the run tee Part 7 at this junction Point the tee toward the ground 4 Run a 36 hydraulic hose from the run tee to the fitting Part 6 on the ball...

Page 33: ...LB 8MJX 8ORM 1 7 681471 FITTING HYD TEE 8MJX 8FJX 8MJX 1 8 679796 FITTING HYD 8ORM 8ORM 2 9 674672 8 HYD ELB 1 10 678346 HOSE HYD 5 36 8FJX 8FJX90 1 11 690670 HOSE HYD 5 60 8FFFS 8MJX 6 12 640956 SCREW 250 20 X 3 00 GR 5 HHC 2 13 640149 WASHER 1 4 SPRING LOCK 2 14 654453 NUT 250 20 GR 2 LOCK NYLON INSERT 2 15 640059 SCREW 50 13 X 1 50 GR 5 HHC 2 16 640157 WASHER 1 2 SPRING LOCK 2 17 660638 NUT 500...

Page 34: ...ck up the seal by its outer member 4 Inspect each seal lip carefully for nicks scratches and dirt at time of installation If dirty use a soft clean cloth and carefully wipe off seal DO NOT wipe seal with fingers this only imbeds dirt in the seal NEVER clean rubber related seals with a mineral based solvent Clean rubber seals in denatured alcohol or non mineral based solvents only NOTE Seals can be...

Page 35: ...tmost importance that the hydraulic system of this loader be kept free from dirt and foreign matter All internal parts to the hydraulic system of your loader have been carefully cleaned inspected and plugged with protective caps before shipment All protective caps should be kept in place until the hydraulic system is connected NOTE Over 75 percent of all hydraulic failure and service is caused by ...

Page 36: ...CH 3 1 4 GLAND O RING 1 EACH 3 1 4 BACKUP RING 1 EACH 1 3 4 U CUP SEAL 1 EACH 1 3 4 ROD WIPER 1 EACH 1 LOCKNUT KIT NO 675576 COMPLETE ASSEMBLED 3 1 4 CYLINDER PISTON WITH ALL SEALS CONSISTS OF 1 EACH 3 1 4 ALUMINUM GLAND 2 EACH 3 1 4 U CUP SEAL 1 EACH 1 ROD O RING 1 EACH 1 LOCKNUT KIT NO 675573 ALL SEALS NEEDED TO SERVICE ONE 1 1 3 4 CYLINDER GLAND CONSISTS OF 1 EACH 3 1 4 GLAND O RING 1 EACH 3 1 ...

Page 37: ... 780NSL ITEM NO PART NO DESCRIPTION QTY 1 679247 TUBE WELDMENT 1 2 661017 NUT 1 00 14 GR C LOCK THIN 1 3 675577 PISTON ASSEMBLY 1 4 640301 1 O RING 1 5 675570 GLAND ASSEMBLY 1 6 679248 ROD WELDMENT 1 BUCKET CYLINDER Part No 679246 780SL ITEM NO PART NO DESCRIPTION QTY 1 680736 TUBE WELDMENT 1 2 661017 NUT 1 00 14 GR C LOCK THIN 1 3 675577 PISTON ASSEMBLY 1 4 640301 1 O RING 1 5 675570 GLAND ASSEMB...

Page 38: ...HYDRAULIC CYLINDER PARTS DIAGRAM Page 36 ...

Page 39: ...sharp knife Be sure not to scratch sealing surfaces of aluminum piston If a sharp knife is not available An electric soldering gun or hot iron may be used to melt throughout seals All gland seals shown with a section removed to facilitate correct installation Note To install rod wiper and U cup seal fold similar to shape shown below slip into gland bore and locate each in its respective groove Too...

Page 40: ...ts E LIMITATIONS OF WARRANTIES AND CUSTOMER S REMEDIES To the extent permitted by law neither Legend the Dealer nor any person or company affiliated with either of them makes any warranties representations conditions or promises express or implied as to the quality performance or freedom from defects of the Products covered by these warranties other than those set forth herein THERE ARE NO IMPLIED...

Page 41: ... 1250 M30 1300 950 1650 1200 1850 1350 2300 1700 M33 1750 1300 2200 1650 2500 1850 3150 2350 M36 2250 1650 2850 2100 3200 2350 4050 3000 SAE Recommended Torque Settings Grade 5 Grade 8 Lubricated Dry Lubricated Dry Size N m Lb ft N m Lb ft N m Lb ft N m Lb ft 1 4 9 5 7 12 9 13 5 10 17 12 5 5 16 20 15 25 18 28 21 35 26 3 8 35 26 44 33 50 36 63 46 7 16 55 41 70 52 80 58 100 75 1 2 85 63 110 80 120 9...

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