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Rankin Rc20-48 Series Manual

Rotary cutters
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Summary of Contents for Rankin Rc20-48 Series

  • Page 2: Introduction

    DEALER PREPARATION CHECK LIST 20 & 21 Series Rotary Cutter THIS CHECKLIST IS TO REMAIN IN OWNER’S MANUAL It is the responsibility of the dealer to complete the procedures listed below, then review this checklist with the customer upon the delivery or the sale of this implement. .
  • Page 3 TO THE DEALER: Assembly and proper installation o this product is the responsibility o the dealer. Read manual instructions and saety rules. Make sure all items on the Preparation Check List in the Operator’s Manual are completed beore releasing equipment to the owner. TO THE OWNER: Read this manual beore operating your equipment.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS Introduction..................... 4 Saety ......................5-8 Description ....................9-10 Preparation ..................... 11-12 Attaching ....................13-14 Detaching ....................15-16 Operation....................16-18 Lubrication & Maintenance..............19-20 Service ....................21-25 Storage ......................25 Assembly & Setup ...................26-31 Bolt Torque Chart ..................32 Troubleshooting.................... 33 Parts ......................34-42 Replacements Parts / Product Warranty............43 All inormation, illustrations and speciications in this manual are based on the latest inormation available at the time o...

  • Page 5: SaEty 5

    SAFETY RULES ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! Saety is a primary concern in the design and manuacture o our products. Unortunately, our eorts to provide sae equipment can be wiped out by an operator’s single careless act. In addition to the design and coniguration o equipment, hazard control and accident prevention are dependent upon the awareness, concern, judgment, and proper training o...
  • Page 6 SAFETY RULES ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! (Saety Rules continued rom previous page) Use both ront and rear delectors to reduce the possibility o object being thrown. Make sure all saety decals are installed. Replace i damaged. (See Saety Decals section or location.) These mowers are intended or agricultural appli- cations only.
  • Page 7 SAFETY RULES ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! Stop power unit and equipment immediately upon leak down, hydraulic system ailures, mechanical striking an obstruction. Turn o engine, remove ailures, or movement o control levers can cause key, inspect, and repair any damage beore equipment to drop or rotate unexpectedly and cause resuming operation.
  • Page 8 SAFETY and INSTRUCTIONAL DECALS ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! Replace Immediately i Damaged! Need Oil Decal PN 100197 RC20-60P Model Number Safety Decal PN 100211 Serial Number 8 Saety and Instruction Decals...

  • Page 9: Description 9

    TECHNICAL DESCRIPTION Model RC20/21- 48 RC20/21-60 RC20/21-72 Capacity Cutting Width 48 inches 60 inches 72 inches Cutting Height 1.5 to 9 inches 1.5 to 9 inches 1.5 to 9 inches Cutting Capacity (diameter) up to 1 inch up to 1 inch up to 1 inch Cutting Chamber Depth 7.5 inches...
  • Page 10 GENERAL DESCRIPTION Your 20 & 2 Series Rotary Cutter has been careully designed or cutting grass and small brush. This manual is provided to give you the necessary operation and maintenance instructions or keeping your rotary cutter in excellent operating condition. Please read this manual thoroughly. Understand the purpose o the controls and how to use them.

  • Page 11: Preparation 11

    PREPARATION • Selecting Tractor PTO Speed IMPORTANT: Never operate a cutter equipped or 540 rpm PTO drive with a actor equipped to 1000 rpm PTO. Always run tractor at rated PTO speed. Overspeed will cause damage to drive system. Reer to your tractor Operator’s Manual to change PTO stub shat, i...
  • Page 12 PREPARATION • Installing Hitch Pin Bushings or Category 1 Quick Coupler Hitch NOTE: Install bushings on both hitch pins. Right-hand side shown. . Install bushing (A) over hitch pin with cross hole as shown. 2. Install bushing (B) as shown. .
  • Page 13 ATTACHING • Attaching Cutter to Tractor with Quick Coupler Hitch CAUTION: To avoid bodily injury or machine damage whenever an implement is attached, put transmission in PARK position and check the ull range o hitch or intererence, binding, or PTO separation. Do not stand between tractor and implement.
  • Page 14 ATTACHING • Assembling PTO Driveline Telescoping Members (I Necessary) . Apply multipurpose grease around outside surace o inner driveline tube (A). 2. Align driveline halves and assemble telescoping members together. .Apply multipurpose grease, or equivalent, to all lubrication ittings beore operating. (See Lubrication and Maintenance section.) •...

  • Page 15: Attaching

    ATTACHING (continued rom previous page) 5. Raise and lower cutter slowly to check or 4. Shorten center link or lengthen lit links to binding or intererence. Check cutter-to-tractor provide clearance. (See your tractor driveline telescoping length to ensure it does Operator’s Manual.) not bottom out.

  • Page 16: Detaching

    DETACHING • Tractor with Quick Coupler Hitch . Raise both latch control levers on quick coupler (A). 2. Start tractor engine. . Lower cutter to the ground. Continue lowering quick coupler until hooks clear cutter hitch pins. 4. Careully drive tractor away. •...
  • Page 17 OPERATION • Adjusting Cutting Height and Angle (51mm) lower in the front. This tilt decreases horse- power requirements and increases potential ground DANGER Help prevent bodily injury or death speed. When fine shredding is desired, adjust rotary caused by entanglement in rotating driveline or cutter deck level or slightly lower in the rear.

  • Page 18: Operation

    OPERATION • Follow Sae Operating Procedures • Keep Riders O Machine DANGER Keep riders o. Riders are subject 1. Perform BEFORE EACH USE maintenance in the to injury or death such as being struck by oreign Lubrication and Maintenance section. objects and being thrown o...

  • Page 19: Lubrication & Maintenance

    LUBRICATION and MAINTENANCE • Lubricating and Maintaining Machine Saely c. RC20-48 and RC2-48: Reinstall tailwheel DANGER Help prevent bodily injury or tube assembly support in original position. death caused by entanglement in rotating 4. Inspect blades or wear. (See SERVICE SECTION driveline or blades.
  • Page 20 LUBRICATION and MAINTENANCE • Lubrication Beore Each Use 1. Driveline Universal Joints Note: Pull each section to be sure driveline and shields are securely connected. Make certain PTO shielding is in good a. Apply multi-purpose grease with a grease gun. condition.

  • Page 21: Service

    SERVICE • Practice Sae Service Procedures • Disassembling and Inspecting Slip Clutch . Remove slip clutch driveline. CAUTION: To help prevent personal injury caused by unexpected movement, be sure to (See procedure in this section.) service machine on a level surace. NOTE: Belleville springs, which are part of the clutch, keep Beore servicing or adjusting machine connected to a tractor:...
  • Page 22 SERVICE (Service continued rom previous page) shield chain (Disconnect driveline shield chain) /2” x ” Gr 8 bolt A - Gap B - Clutch Plate C - Belleville Spring D - Cap Screw Lock Nut (6 used) • Removing and Installing Driveline-Slip Clutch .
  • Page 23 SERVICE • Removing and Installing Driveline-Shear Bolt Snap Ring . Disconnect driveline shield chain. 2. Bend back driveline shield cone. . Remove shear bolt and lock nut. 4. Push driveline onto input shat toward gearbox and remove snap ring. 5. Pull driveline rom gearbox shat. 6.
  • Page 24 SERVICE • Replacing Blades IMPORTANT: Operating with loose blade hard- ware will damage the blade pan and blades. Whenever the blades have been removed or replaced, blade hardware MUST also be replaced. Always use genuine parts. Check blade hardware torque ater one hour o operation and every eight (8) hours thereater.

  • Page 25: Storage

    SERVICE • Replacing Blade Pan 7. To reinstall blade pan, reverse the above steps. . Remove the blades. (See Replacing Blade in Be sure to tighten the castle nut and replace this section.) the cotter pin. 2. Remove cotter pin rom output shat o the 8.
  • Page 26 ASSEMBLY • Perorm Predelivery Service Saely CAUTION: Understand the predelivery procedure beore doing the work. During the assembly, test, and adjustment procedures, it may be necessary to operate drives and hydraulic systems. Stay clear o machine elements when raising or lowering machine and during operation o drivelines. Practice good communication with other service technicians.
  • Page 27 ASSEMBLY • Assemble Hitch . Rotate hitch up. 7. Repeat on opposite brace. 2. Install hitch pivot bushing, bolt, lock nut 8. Tighten all link and brace hardware (A). and tighten. Rotate Hitch Up IMPORTANT: Please do not over tighten hardware. IMPORTANT: Please do not over tighten hardware.
  • Page 28 ASSEMBLY • Install Tailwheel • Fill Gearbox . I necessary, attach using axle bolt, castle nut, IMPORTANT: Cutter is shipped without gearbox lubricant. DO NOT operate the cutter without ill- and cotter pin. ing gearbox with speciied amount o lubricant listed 2.
  • Page 29 ASSEMBLY • Install Front Deflector-Chains (If Equipped) 1. Insert 5/16 x 3” bolts and flat washers (Items 3&4) through hole from inside out of rotary cutter. 2. Place front chain guard (Item 1) against tube frame of rotary cutter and install flat washers, lock washers and nuts until all are installed.
  • Page 30 ASSEMBLY • Install Front Deflector-Rubber (If Equipped) 1. Insert 5/16 x 3” bolts and flat washers (Items 3&4) through hole from inside out of rotary cutter. 2. Place belt guard (Item 2) against tube frame of rotary cutter and install front belt guard frame (Item 1) flat washers, lock washers and nuts until all are installed, clamping belt guard between belt guard frame and rotary cutter front tube.
  • Page 31 ASSEMBLY Final Inspection and Adjustments IMPORTANT: PTO driveline may be too long or some tractor models, causing tractor transaxle damage. Modiy driveline i necessary. Attach rotary cutter to tractor and check cutter-to-tractor driveline telescoping length clearance. (See CHECKING DRIVELINE/CUTTER CLEARANCE in Attaching section.) IMPORTANT: Blade hardware MUST be checked ater the irst hour and every eight (8) hours thereater.
  • Page 32 TORQUE SPECIFICATIONS roper torque for American fasteners used on manufactured implement. AMERICAN Recommended Torque in Foot Pounds (Newton Meters).* Bolt Head Markings WRENCH BOLT DIAMETER SIZE(IN.)”A” (IN.)”B” AND GRADE 2 GRADE 5 GRADE 8 THREAD SIZE 7/16 1/4 -20 UNC 6 (7) 8 (11) 12 (16)

  • Page 33: Troubleshooting

    TROUBLESHOOTING GUIDE Problem Possible Cause Possible Remedy . Rotary cutter not level, side to side. Level -pt hitch linkage on tractor. Leaves a streak of uncut or partially cut grass. 2. Blade dull or bent. Sharpen or replace blades. . Blades unable to cut that part o Slow ground speed o...

  • Page 34: Parts

    PARTS * For S Item Number Qty. Part Number Description Deck Assembly 100542 Model Number Decal RC20 - 48P 100572 Model Number Decal RC20 - 48SC 100543 Model Number Decal RC20 - 60P 100573 Model Number Decal RC20 - 60SC 100544 Model Number Decal RC20 - 72P 100574...
  • Page 35 PARTS 13 1 12 1 Hitch Assembly Item Number Qty. Part Number Description Hit Mount Lug 300326 Top Link Mount 300277 Pivot Link Kit 300279 Hitch Pivot Bushing 300282 Mount Bushing 300280 Pivot Link 300283 Lit Strap RC20/21 – 48 & 60” cut 300284 Lit Strap RC20/21 –...
  • Page 36 PARTS Gearbox and Blade Pan Assembly Item Number Qty. Part Number Description 300321 Blade pan RC20/21 Series – 48 & 60” cut 300322 Blade pan RC20/21 Series – 72” cut 300125 Blade Set (2 Blades) RC20/21 – 48” cut 300126 Blade Set (2 Blades) RC20/21 –...
  • Page 37 PARTS CAUTION Ref. #4 is a Grade 2 shear bolt and is to be used with shear pin driveshaft only. Ref. #4A is a Grade 8 retaining bolt and is to be used with slip clutch driveshaft only. RC21 Series Gearbox Gearbox RC20 Series RC21 Series...
  • Page 38 PTO Driveline Shear Pin Assembly Item Number Qty. Part Number Description 300246 Yoke 1 3/8” – 6 Spl. ASGE 300247 Cross & Bearing Kit 300248 Roll Pin 10 x 65 300249 Inboard Yoke Ov 300250 Inner Profile OV for 48” cut 300251 Outer Profile 1 for 48”...
  • Page 39 Item Number Qty. Part Number Description 300246 Yoke 1 3/8” – 6 Spl. ASGE 300247 Cross & Bearing Kit 300248 Roll Pin 10 x 65 300249 Inboard Yoke Ov 300250 Inner Proile OV or 48” cut 300251 Outer Proile 1 or 48” cut 300266 Inner Proile Ov or 60 &...
  • Page 40 PARTS Tailwheel Assembly Item Number Qty. Part Number Description 300235 Laminated Tailwheel Assembly - Complete 300237 Tailwheel - Laminated Tire 300239 Tailwheel Fork with Roll Pin 300240 Roll Pin (Tailwheel Fork) 300290 Tailwheel Tube or RC20 & 21 Series Rotary Cutters 300128 Axle Bolt Kit or Laminated Tire...
  • Page 41 PARTS 7, 8, 9 Rubber Belt Delector Assembly (ater 09-2007) Item Number Qty. Description Part Number RC20 & 21-48 RC20 & 21-60 RC20 & 21-72 300327 300328 300329 Front Belt Guard Frame 300330 300330 300330 Rear Belt Guard Frame 300331 300332 300333 Front Belt...
  • Page 42 PARTS 9, 10, 11 5, 6 Chain Delector Assembly (ater 09-2007) Item Number Qty. Description Part Number RC20 & 21-48 RC20 & 21-60 RC20 & 21-72 300339 300340 300341 Front Ghain Guard Frame 300342 300342 300342 Rear Ghain Guard Frame 300167 300168 300169...

This manual is also suitable for:

Rc20-60 seriesRc20-72 seriesRc21-48 seriesRc21-60 seriesRc21-72 series

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