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OWNERS MANUAL
8/1/08
MANUAL NO. 681136
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

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Table of Contents
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Summary of Contents for Koyker PRO 2785

  • Page 1 OWNERS MANUAL 8/1/08 MANUAL NO. 681136 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...
  • Page 2: Table Of Contents

    CONTENTS CONTENTS PAGE Introduction ................................1 SAFETY INFORMATION Safety Alert Symbol ............................. 2 Safety Information ..............................3-5 Safety Decals ................................ 6 Tractor & Safety Pointers ............................. 7 ASSEMBLY INSTRUCTIONS Attaching Loader ..............................8 Attaching Bucket ..............................9 Detaching Loader ..............................10 Detaching Bucket………………………………………………………………………………………………..11 OPERATING INSTRUCTIONS Operational ................................12-13...
  • Page 3: Introduction

    -Rounded Back Bucket -Soft Ride Nitrogen Accumulator Koyker Manufacturing Inc. has created one of the best loaders in the market through consumer research, product testing and by using the latest technological enhancements to deliver what you’ve been asking for… a loader that will get the job done with ease.
  • Page 4: Safety Alert Symbol

    SAFETY ALERT SYMBOL The symbol shown below is used to call your attention to instructions concerning your personal safety. Watch for this symbol it points out important safety precautions. It means ATTENTION! Become Alert! Your Personal Safety Is Involved! Read the message 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.
  • Page 5: Safety Information

    SAFETY Improper use of a loader can cause serious injury or death. The following safety precautions, and those given on the tractor mount installation instructions, should be thoroughly understood before attempting to operate this machine. BEFORE OPERATING: Carefully study and understand this manual, the specific tractor mount instructions, and the attachment(s) manual(s).
  • Page 6 SAFETY CONTINUED Transport the machine load at the slowest speed possible and with the loader boom at the lowest transport position to avoid tipping or upsetting, which may result in serious injury or death. Be extremely careful when working on inclines or near loose fill, rocks, and holes as they can cause tipping or upsetting which may result in serious injury or death.
  • Page 7 1. Move Slowly! 2. Always use care and common sense! 3. Be careful for your own sake and for that of others! 4. Koyker Mfg. Co. includes all reasonable means for accident prevention except a safe and careful operator. FIG. 5-1...
  • Page 8: Safety Decals

    SAFETY DECALS Page 6...
  • Page 9: Tractor & Safety Pointers

    TRACTOR & SAFETY POINTERS The use of good judgment and common sense is necessary by the operator in using 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 weights and tire ballast are added to a loader-equipped tractor.
  • Page 10: Attaching Loader

    ATTACHING LOADER IMPORTANT: Never attempt loader attachment on grades which are not reasonably level. 1. Check to be sure that the surfaces of the mounts are free of obstructions. (Fig 8-1) 2. Drive the tractor slowly and carefully in between the loader arms only far enough to permit hook-up of the hydraulic system hoses.
  • Page 11: Attaching Bucket

    ATTACHING BUCKET Prior to attaching the bucket, prepare the adapter for engagement by pulling the adapter handle back (towards the operator) into it’s cocked position. With the bucket positioned on level ground, tilt the bucket adapter forward approximately 45º. (Fig 9-1) Slowly drive forward into the bucket, centering the adapter with the bucket as you go and position the top mount bar of the adapter just below the hooks on the back side of the bucket.
  • Page 12: Detaching Loader

    DETACHING LOADER IMPORTANT: Never attempt loader attachment on grades which are not reasonably level. Raise loader frame slightly to permit loader stand reengagement. (Fig. 10-1) Lower bucket to ground and tip slightly forward to apply pressure to mount connection. Note: This will prevent the loader from inadvertently rocking forward when the mount pins are removed and uprights are disengaged from it’s cradle.
  • Page 13: Detaching Bucket

    DETACHING BUCKET Prior to detaching the bucket, prepare the adapter for disengagement by pulling the adapter han- dle back (towards the operator) into its unlocked 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).
  • Page 14 OPERATION WARNING: Never allow anyone to operate the loader until they have carefully reviewed and understood this owners manual. FILLING THE BUCKET: When material is piled on a slope, it is best to drive tractor up the slope straight into the pile. Operating sideways on a slope has a tendency to tip the loading unit.
  • Page 15 OPERATION CONTINUED SOFT RIDE FEATURE: The soft ride feature was designed to diminish the stresses on the tractor, mounts, loader and operator while transporting heavy loads to and from the field. The soft ride feature incorporates a pre-charged nitrogen accumulator to act as a shock absorber similar to that of an automobile. While in operation the loader may feel “squishy”...
  • Page 16: Operational

    *Specifications based on ASABE standards S301.3 (Front-End Agricultural Loader Ratings) The above information is based on testing done by Koyker Mfg. Variations in maximum lift height and other specs for different tractors are due to tire sizes, variations in loader mounting locations and hydraulic system efficiency.
  • Page 17: Loader Inspection, Service, And Maintenance

    LOADER INSPECTION, SERVICE, AND MAINTENANCE Lower the bucket to the ground, shut off tractor engine, and relieve the pressure in the hydraulic system before adjusting, lubricating, or servicing the loader. Periodically check all bolts for looseness and re-torque if necessary. Before storage, be certain all hydraulic cylinders are fully collapsed so that the rod will not be exposed to the elements or damaged.
  • Page 18: Hydraulic System Parts List

    HYDRAULIC SYSTEM PARTS LIST ITEM NO. PART NO. DESCRIPTION QTY. 681000 3 1/2" LIFT CYLINDER 681006 3 1/4' BUCKET CYLINDER 681183A 1ST OIL LINE (A) 681184A 2ND OIL LINE (A) 681185A 3RD OIL LINE (A) 681186A 4TH OIL LINE (A) 681183B 1ST OIL LINE (B) 681184B...
  • Page 19: Hydraulic System Parts Diagram

    HYDRAULIC SYSTEM PARTS DIAGRAM Page 17...
  • Page 20: Pro "2785" Loader Parts Diagram

    KOYKER “PRO 2785” LOADER PARTS DIAGRAM Page 18...
  • Page 21: Parts Identification Schedule

    PARTS IDENTIFICATION SCHEDULE PART NUMBER DESCRIPTION 640028 SCREW - .375 - 16 X 1.00 GR5 HHC 640032 SCREW-.375-16 X 1.25 GR 5 HHC 640034 SCREW-.375-16 X 1.50 GR 5 HHC 640089 SCREW.625-11 X 5.00 GR 8 HHC 640141 NUT - .625-11 GR 5 CENTER LOCK 640153 WASHER - 3/8"...
  • Page 22 BUSHING 1.50 X 4.63 NYL 681071 BUSHING 1.50 X 1.00 NYL 681072 BUSHING 1.50 X 3.00 NYL 681090 PRO 2785 DECAL - RED AND BLACK 680287 PRO 2785 DECAL - GREEN AND YELLOW 681142 OIL LINE COVER 681165 CLEVIS PIN 3/4" DIA X 2"...
  • Page 23: Euro Adapter Parts Diagram

    EURO ADAPTER PARTS DIAGRAM Page 21...
  • Page 24: Euro Adapter Parts Identification Schedule

    EURO ADAPTER PARTS IDENTIFICATION SCHEDULE ITEM NO. PART NO. DESCRIPTION QTY. 640032 SCREW-.375-16 X 1.25 GR 5 HHC 640154 WASHER - 3/8" FLAT 654121 NUT - .375 - 16 GR 2 LOCK NYLON INSERT 657632 ZERK-1/4-28 GREASE 679304 .79" (20 MM) DIA X 8" PIVOT PIN 679308 EXTENSION SPRING 680761...
  • Page 25: Bucket Parts Diagram

    BUCKET PARTS DIAGRAM Page 23...
  • Page 26: Bucket Parts Identification Schedule

    BUCKET PARTS IDENTIFICATION SCHEDULE Optional Euro Buckets with Bolt-on Blade & Clevis 8 1/2' Euro Bucket With Grapple ITEM NO. PART NO. DESCRIPTION QTY. 679767 8 1/2' EURO BUCKET WLDT 679772 8 1/2' BOLT ON BUCKET BLADE (PAINTED) 672852 BUCKET CLEVIS 673286 SLING LINK 673366...
  • Page 27 BUCKET PARTS IDENTIFICATION SCHEDULE (Cont’) Optional Euro Buckets with Bolt-on Blade & Clevis 8 1/2' Euro Bucket Non Grapple ITEM NO. PART NO. DESCRIPTION QTY. 679422 8 1/2' EURO BUCKET WLDT (NON GRPL) 679722 8 1/2' BOLT ON BUCKET BLADE (PAINTED) 672852 BUCKET CLEVIS 673286...
  • Page 28: Manual Accumulator Kit Parts Diagram

    MANUAL ACCUMULATOR KIT PARTS DIAGRAM KIT NUMBER 681530 Page 26...
  • Page 29: Manual Accumulator Kit Parts Identification Schedule

    MANUAL ACCUMULATOR KIT PARTS IDENTIFICATION KIT NUMBER 681530 PART NUMBER DESCRIPTION 653624 HYD FITTING 8ORM-8FJX 679792 #8 HYD TEE 682690 PLATE-BRACKET SOFT BRACKET 640956 SCREW-.250-20 X 3.00 GR 5 HHC 640149 WASHER - 1/4" SPRING LOCK 654453 NUT - .250-20 GR 2 LOCK NYLON INSERT 675463 HOSE-.5-18 8FJX-8MJX 679791...
  • Page 30: Electric Accumulator Kit Parts Diagram

    ELECTRIC ACCUMULATOR KIT PARTS DIAGRAM KIT NUMBER 681163 Page 28...
  • Page 31: Electric Accumulator Kit Parts Identification Schedule

    ELECTRIC ACCUMULATOR KIT PARTS IDENTIFICATION KIT NUMBER 681163 PART NUMBER DESCRIPTION 682690 PLATE-BRACKET SOFT BRACKET 653624 HYD FITTING 8ORM-8FJX 679792 #8 HYD TEE 640956 SCREW-.250-20 X 3.00 GR 5 HHC 640149 WASHER - 1/4" SPRING LOCK 654453 NUT - .250-20 GR 2 LOCK NYLON INSERT 681181 MANIFLOD BLOCK ASSY 679726...
  • Page 32: Hydraulic Cylinder Information

    CYLINDERS IMPORTANT: Read these service tips before beginning assembly of cylinder gland or piston. 1. Keep seals clean from the time they are removed from package until they are installed. 2. Clean the groove or bore into which the seal is to be fitted before installing the seal. 3.
  • Page 33: Hydraulics Information

    HYDRAULIC SYSTEM The hoses from the tractor valves are attached to the oil lines which are on the inside of the loader main frame. Re-check all joints to prevent leakage after loader is mounted and in operation. KEEP SYSTEM CLEAN - USE ONLY CLEAN OIL CAUTION! It is of utmost importance that the hydraulic system of this loader be kept free from dirt and foreign matter.
  • Page 34: 1/4" Cylinder Service Kit

    3 1/4” CYLINDER SERVICE KITS WITH 1 3/4” SHAFT KIT NO. 681616: Complete kit with all seals needed to service one (1) 3 1/4” Cylinder. Consists of: 1 each 3 1/4” Gland “O” Ring 1 each 3 1/4” Backup Ring 1 each 1 3/4”...
  • Page 35: 1/2" Cylinder Service Kit

    3 1/2” CYLINDER SERVICE KITS WITH 2” SHAFT KIT NO. 681555: Complete kit with all seals needed to service one (1) 3 1/2” Cylinder. Consists of: 1 each 3 1/2” Gland “O” Ring 1 each 3 1/2” Backup Ring 1 each 2”...
  • Page 36: Hydraulic Cylinder Parts List

    HYDRAULIC CYLINDER PARTS LIST LIFT CYLINDER (Part No. 681000) ITEM NO. PART NO. DESCRIPTION QTY. 681002 TUBE WELDMENT 661017 NUT - 1.00-14 GR C LOCK THIN 650595 PISTON ASSEMBLY 640301 1" O-RING 680343 GLAND ASSEMBLY 681005 ROD WELDMENT BUCKET CYLINDER (Part No. 681006) ITEM NO.
  • Page 37: Hydraulic Cylinder Parts Diagram

    HYDRAULIC CYLINDER PARTS DIAGRAM Page 35...
  • Page 38: Piston And Gland Diagram

    CYLINDER GLAND SERVICE DIAGRAM Note: To install rod wiper and U-cup seal, fold All gland seals shown with a section removed to facilitate correct installation. similar to shape shown below, slip into gland ROD WIPER bore and locate each in its respective groove. Tools are used to fold seals, take care not to damage sealing surfaces.
  • Page 39: Limited Warranty Information

    (1) year from the sale to the original purchaser. Any defective cylinder reported to Koyker within one (1) year from the sale by the dealer to the original purchaser may be repaired or replaced after Koyker’s inspection and approval. In such case, notify a Koyker dealer for proper instructions.
  • Page 40 Koyker; rental charges of any substitute equipment; expenses due to lost, damaged, or delayed products or parts resulting from acts beyond the control of Koyker; and personal injury or death of operator or bystanders by misappropriated use of Koyker products or parts.
  • Page 41 2. For surface wear, scheduled maintenance parts, and other items that Koyker deems expendable. 3. If products or parts not manufactured by Koyker or approved by Koyker are connected to or used in conjunction with the Koyker products or parts and if Koyker deems the non-Koyker products or parts affect the performance, safety, reliability, or life of the Koyker products or parts.
  • Page 42 TORQUE SPECIFICATIONS 1. Tightening Bolts & Nuts Check all loader bolts and nuts for tightness every 50 working hours. The movement of the loader over rough terrain may cause bolts to come under pressure and over a long period of time some slight stretching of the bolt may occur.

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