LOFTNESS 61G4 Series Owner's Manual And Parts Book
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LOFTNESS 61G4 Series Owner's Manual And Parts Book

Carbide cutter
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Carbide Cutter
61G4 • 71G4
Owner's Manual and Parts Book
(Originating w/Serial Number
42-1316 thru 42-1665)
Model Number:
Serial Number:
Date of Purchase:
N82086 Rev. D
02.13.17

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  • Page 1 Carbide Cutter 61G4 • 71G4 Owner’s Manual and Parts Book (Originating w/Serial Number 42-1316 thru 42-1665) Model Number: Serial Number: Date of Purchase: N82086 Rev. D 02.13.17...
  • Page 3 LOFTNESS factory or authorized LOFTNESS dealership or in any way so as in LOFTNESS’ judgment, to affect its stability or reliability, nor which has been subject to misuse, negligence or accident, nor to any machine or attachment which shall not have been operated in accordance with LOFTNESS’...

  • Page 5: Table Of Contents

    Table of Contents Warranty Table of Contents Ordering Code Ordering Code ............. . .1 Carbide Cutter (Example) .
  • Page 6 Table of Contents Maintenance (Cont’d) Tooth Removal and Installation ..........23 Double Tooth .

  • Page 7: Ordering Code

    Ordering Code Ordering Code Carbide Cutter (Example) The ordering code will consist of two numbers (machine size), two letters (machine type), one letter (cutter type), four numbers (motor system), one letter (sheaves / belt combo), and one number (threshold setting). An example for a carbide cutter of this type would be as shown below.
  • Page 8 Carbide Cutter OM...

  • Page 9: Introduction

    Continuous improvement and advancement of Loftness products may result in changes to your equipment that may not be reflected in this publication. Loftness reserves the right to make product improvements to the machine at any time. Although great care has been taken to ensure the accuracy of this publication, Loftness does not assume any liability for errors or omissions.

  • Page 10: Carbide Cutter Features

    Introduction Carbide Cutter Features • Downward Rotation Design • Premium Strength Steel Body & Rotor • Front Mounted • Hydraulic Driven • Universal Skid-Steer Mount • Adjustable Tree Pusher • Claw Hooks On Tree Pusher • 17 In. (43 cm) Diameter Rotor (2000 - 2400 RPM) •...

  • Page 11: Safety Instructions

    Safety First Be certain all machine operators are aware of the dangers indicated by safety decals applied to the machine, and be certain they follow all safety decal Safety Alert Symbol instructions. Contact Loftness for safety decal replacement. This message alert...

  • Page 12: Mandatory Shut-Down Procedure

    Safety Instructions Mandatory Shut-Down Procedure • Use the handholds and step plates when getting on and off the machine to prevent falls. Keep steps and platform cleared of mud and debris. • Stop the machine and attachment on a level surface and lower the attachment to the ground.

  • Page 13: Hydraulic Safety

    Safety Instructions Safety Rules (Cont’d) • Keep hands and feet clear! Never step over or climb over the attachment while the rotor is engaged or the engine is running; entanglement could occur. • Keep children, bystanders and other workers off and away from the machine and attachment during •...

  • Page 14: Carbide Cutter Identification

    Safety Instructions Carbide Cutter Identification Pusher Bar Hydraulic Motor Rotor Rotor Bearing Guard Cutting Teeth Skid (left side) Pressure Gauge Hydraulic Hoses Hydraulic Control Valve Drive Belt Cover Manual Holder Mounting Plate Drive Belt (behind cover) Deflector Chains Skid Step (right side) Carbide Cutter OM...

  • Page 15: Safety Decal Locations

    Safety Instructions Safety Decal Locations Check and replace any worn, torn, hard to read or WARNING missing safety decals on your machine. Rotating parts hazard. Can cause serious injuries or death. Do not operate machine without shields attached. N68716 Part No. N68716 DANGER Part No.
  • Page 16 Safety Instructions Safety Decal Locations (Cont’d) Part No. 4334 Part No. N28385 Part No. N28386 WARNING SKIN PUNCTURE HAZARD. HYDRAULIC LINES. Protect hands and body from high pressure fluids. N23506 Part No. N23506 Carbide Cutter OM...
  • Page 17 Safety Instructions Safety Decal Locations (Cont’d) WARNING Rotating parts hazard. Can cause serious injuries or death. Do not operate machine without shields attached. Part No. N17014 N68716 Part No. N68716 Part No. N29769 Carbide Cutter OM...
  • Page 18 Carbide Cutter OM...

  • Page 19: Set-Up Instructions

    Set-up Instructions Pusher Bar Assembly Move rear arms into position so hole in lower end of rear arm (4) aligns with the top hole (6) of the side plates (indicated by the shipping tag). Remove the shipping tag. NOTE: Assembling the pusher bar requires two people or the use of an approved lifting device to NOTE: The pusher bar is factory-set so the upper hole in support the push bar as it is being adjusted.

  • Page 20: Installing The Carbide Cutter To The Loader

    Set-up Instructions Installing the Carbide Cutter to the Loader Fully raise the attachment-locking levers on the loader mounting plate. NOTE: The hydraulic hose quick couplers shown above are not supplied with the carbide cutter. Install the carbide cutter quick couplers to the loader. NOTE: The case drain quick coupler (1) of the carbide cutter must be connected to the loader’s auxiliary hydraulic system for proper operation...

  • Page 21: Checking Rotor Speed

    Set-up Instructions Checking Rotor Rotation (Cont’d) NOTE: The tachometer shown is not supplied with the carbide cutter. Test the rotor RPM with loader engine at full throttle. DANGER: Keep hands, feet, and clothing clear of belts, sheaves, and rotor while loader is running.

  • Page 22: Cutter Bar Adjustment

    Set-up Instructions Cutter Bar Adjustment NOTE: The cutter bar can be adjusted back or forward to increase or decrease the distance between the bar and the rotor. WARNING: Shut down and disconnect hydraulic hoses from skid steer before adjusting the cutter bar. Loosen the seven bolts with washers (1) securing the cutter bar (2) to the frame.

  • Page 23: Operating Instructions

    WARNING: Do not operate the attachment above the rated RPM. Check with your Lower the carbide cutter until the skids contact the Loftness dealer to be sure your attachment ground. Engage the auxiliary hydraulics. Move the is set-up with the correct hydraulic motor to loader and carbide cutter forward and begin mowing.

  • Page 24: Log Moving

    Operating Instructions Log Moving Disengage hydraulic power to rotor before moving logs and brush with pusher bars. Raise the loader lift arms and tilt the carbide cutter forward until the push bar extensions are over the log or item being moved. Lower the lift arms and position the log between push bar extensions and the carbide cutter.

  • Page 25: Maintenance

    Maintenance General Maintenance Maintenance Schedule To ensure efficient operation, you should inspect, SERVICE REQUIRED lubricate, and make necessary adjustments and repairs at regular intervals. Parts that are starting to show wear should be ordered ahead of time, before a costly SERVICE POINTS breakdown occurs and you have to wait for replacement parts.

  • Page 26: Lubrication

    Maintenance Lubrication Grease Point Location Rotor Bearing, left Rotor Bearing, right (shown with manual cover removed) Carbide Cutter OM...

  • Page 27: Overhung Load Adapter

    Maintenance Lubrication (Cont’d) Overhung Load Adapter Cover must be removed to access the overhung load Grease Points Location (Cont’d) adapter. Refer to“Removing Motor Cover” on page 22 for instructions. Use a #2 general purpose lithium based grease unless noted otherwise. NOTE: Replace any broken or missing grease fittings.

  • Page 28: Removing Belt Cover

    Maintenance Removing Belt Cover Carefully lift the cover off of the frame, being cautious not to pinch or damage the pressure gauge hose (1) under the motor cover. Belt Adjustment Remove the two bolts (1) and the manual cover (2). Remove belt cover and motor cover following the Remove the three bolts (3) and lift the drive belt cover (4) instructions earlier on this page.

  • Page 29: Tooth Removal And Installation

    Maintenance Belt Adjustment (Cont’d) Quadco Teeth 3/8 in. 1/2 in. When reinstalling bolts, tighten this bolt first. Loosen the jam nut (3). Remove the two bolts (1) and tooth (2). Turn the hex nut (4) to either increase or decrease belt tension.

  • Page 30: Tooth Sharpening (Quadco Option Only)

    Maintenance Tooth Sharpening (Quadco Option Only) Can be sharpened ⁄ " up to this point. NOTE: The teeth need to be kept sharp to maintain the most effective operation of the attachment. Daily inspection and touch up is recommended. Dashed lines represent the approximate angle NOTE: The teeth can either be removed from the for each time the tooth...

  • Page 31: Storage

    Maintenance Storage End of Season • Clean entire carbide cutter thoroughly. • Clean belt and sprockets, relax the belt tension. • Lubricate all parts of the machine. See “Lubrication” on page 20. • Make a list of all worn or damaged parts and replace them.

  • Page 32: Motor & Sheave Selection Chart

    Maintenance Motor & Sheave Selection Chart VARIABLE DISPLACEMENT LOFTNESS ROTOR TOP SHEAVE (LOFTNESS NUMBER) DISPLACEMENT PART BOTTOM SHEAVE ( LOFTNESS NUMBER) MOTOR NUMBER NUMBER BELT LENGTH (LOFTNESS NUMBER) PARKER 1933-1406 1992-1449 48 Top Sheave N38492 80cc - 110cc 38 Bottom Sheave N38490...

  • Page 33: Troubleshooting

    Maintenance Troubleshooting PROBLEM CAUSE SOLUTION Excessive Vibration Broken or missing teeth. Replace teeth. Mud and/or debris wrapped around Clean the carbide cutter. the rotor. Faulty drive line bearing. Replace bearing(s). Faulty rotor bearing. Replace bearing(s). Damage to rotor (includes bent end Consult factory.
  • Page 34 Carbide Cutter OM...

  • Page 35: Parts Identification

    Parts Identification PARTS IDENTIFICATION Carbide Cutter OM...

  • Page 36: Carbide Cutter Body Assembly

    Parts Identification Carbide Cutter Body Assembly 9,10,11 Parts breakdown of item 5 (N45262) is on page 36. Carbide Cutter OM...
  • Page 37 Parts Identification Carbide Cutter Body Assembly QTY. PART # DESCRIPTION N38523 PUSHER, 61 W/DECALS N68438 PUSHER, 71 W/DECALS N64492 BOLT, 1-14 X 4" GR. 8 FN. THR 4166 WASHER, 1" LOCK 4490 NUT, 1"-14UNF STANDARD N45262 SHIELD, MOTOR 4195 BOLT, 3/8" X 1" GRADE 5 N37756 WASHER, NORD-LOCK 3/8"...

  • Page 38: Carbide Cutter Body Assembly (Cont'd)

    Parts Identification Carbide Cutter Body Assembly (Cont’d) 9,10 12 13 Same as items 29 thru 35 on opposite end. Carbide Cutter OM...
  • Page 39 Parts Identification Carbide Cutter Body Assembly (Cont’d) QTY. PART # DESCRIPTION N89868 COVER, BELT WITH DECALS N134034 PLATE, MANUAL COVER N18360 BOLT, 1/2 X 1-1/4 SER FLG N26748 BOLT, 1/2" X 1" SER FLG N45488 PLATE, WELDMENT MOTOR 4055 NUT, LOCK 5/8" TOP N47366 SKID SHOE 4386...

  • Page 40: Belt And Sheaves (Parker Motor)

    Parts Identification Belt and Sheaves (Parker Motor) N80411 Code “A” N80392 Code “B” N132294 Code “D” QTY. PART # DESCRIPTION N38492 SPROCKET, 14MM 48 TOOTH 37 (MODEL CODE A) N38490 SPROCKET, 14MM 38 TOOTH 37 (MODEL CODE A) N20805 BUSHING, 1-1/2" TPL 3020 7121 -03 KEY, 3/8"...

  • Page 41: Belt And Sheaves (Muncie Motor)

    Parts Identification Belt and Sheaves (Muncie Motor) N132298 Code “E” N132300 Code “F” N132302 Code “G” QTY. PART # DESCRIPTION N49227 SPROCKET, 14MM 40 TOOTH 20MM (MODEL CODE E) N49226 SPROCKET, 14MM 36 TOOTH 20MM (MODEL CODE E) 8126 BUSHING, 1-1/2 TAPERLOCK KEYED (MODEL CODE E & F) 7121-03 KEY, 3/8 X 2 8165...

  • Page 42: Motor Shield W/Gauge (N45262)

    Parts Identification Motor Shield w/Gauge (N45262) Carbide Cutter OM...
  • Page 43 Parts Identification Motor Shield w/Gauge (N45262) QTY. PART # DESCRIPTION N68406 COVER, MOTOR W/DECALS N16163 GAUGE, 0 - 6000 PSI 4" PRESS N16132 BOLT, BHCS #8 - 32 x 1" N16133 NUT, NYLON INSERT #8 N16332 FLANGE, MOUNT GAUGE N16331 FLANGE, MOUNT GAUGE #8 N16335 FLANGE, MOUNT #10...

  • Page 44: Hydraulics, Parker Motor

    Parts Identification Hydraulics, Parker Motor 42,43 (Tank) 25 (Tank) 25 (Pressure) (Tank) (Pressure) * Parts breakdown of item 6 (N51193) is on page 49. * Parts breakdown of item 9 (N38488) is on page 48. (Pressure) * Parts breakdown of item 25 (N21669) is on page 46.
  • Page 45 Parts Identification Hydraulics, Parker Motor QTY. PART # DESCRIPTION N16349 BOLT, 3/4 X 2-1/2 FN TH GR 8 N28567 WASHER, 3/4 NORDLOCK SP N45488 PLATE, WELDMENT MOTOR N41636 PLATE, MOUNT MOTOR N51193 OHLA, 900 W C TO D ADAPTER 4475 BOLT, 3/4"...

  • Page 46: Hydraulics, Parker Motor (Cont'd)

    Parts Identification Hydraulics, Parker Motor (Cont’d) 42,43 (Tank) 25 (Tank) 25 (Pressure) (Tank) (Pressure) * Parts breakdown of item 6 (N51193) is on page 49. * Parts breakdown of item 9 (N38488) is on page 48. (Pressure) * Parts breakdown of item 25 (N21669) is on page 46.
  • Page 47 Parts Identification Hydraulics, Parker Motor (Cont’d) QTY. PART # DESCRIPTION N63426 CLAMP, HOSE N13811 BOLT, 1/4" X 2-3/4" GRADE 5 N90265 WRAP, HOSE 76 N90142 HOSE, 1/2 100 -8FJIC -8MORB N32002 PLUG, 3/8 SCH 40 X .25 N15895 CAP, 1/2 ALUMINUM HOSE N28108 ADAPTER, - 12MOR - 16FOR 4064...

  • Page 48: Hydraulics, Muncie Motor

    Parts Identification Hydraulics, Muncie Motor (Tank) (Pressure) (Tank) (Pressure) * Parts breakdown of item 13 (N34676) is on page 50. * Parts breakdown of item 17 (N16416) is on page 51. * Parts breakdown of item 33 (N34677) is on page 47. Carbide Cutter OM...
  • Page 49 Parts Identification Hydraulics, Muncie Motor QTY. PART # DESCRIPTION N49295 HOSE, 3/4" X 86" -12FJIC -12MOR N24823 DECAL, RETURN 4064 WASHER, FLAT 3/8" N15893 CAP, 3/4 ALUMINUM HOSE N15895 CAP, 1/2 ALUMINUM HOSE N32002 PLUG, 3/8 SCH 40 X .25 N24822 DECAL, PRESSURE N90265...

  • Page 50: Hydraulics, Muncie Motor (Cont'd)

    Parts Identification Hydraulics, Muncie Motor (Cont’d) (Tank) (Pressure) (Tank) (Pressure) * Parts breakdown of item 13 (N34676) is on page 50. * Parts breakdown of item 17 (N16416) is on page 51. * Parts breakdown of item 33 (N34677) is on page 47. Carbide Cutter OM...
  • Page 51 Parts Identification Hydraulics, Muncie Motor (Cont’d) QTY. PART # DESCRIPTION N13876 ELBOW, 90 DEG - 16MOR - 12MJIC N34677 MANIFOLD, CROSS PORT RELIEF N28907 ELBOW, 90DEG -6MJIC -4MOR 4011 BOLT, 1/2" X 1" GRADE 5 N29075 NUT, LOCK 1/2" SERATED FLANGE N49315 G4 MUNCIE VALVE BRACKET 4233...

  • Page 52: Valve, Open Loop Cw (N21669)

    Parts Identification Valve, Open Loop CW (N21669) Valve Open Loop CW (N21669) Schematic 1000 PSI 6000 PSI 1b** 1c** Oil Flow Direction * Use item 2 in parts list, part number N38181, for “Forward” seal kit for items 1a and 1d. ** Use item 3 in parts list, part number N14170, for seal kit for items 1b and 1c.

  • Page 53: Valve, Cross Port Relief (N34677)

    Parts Identification Valve, Cross Port Relief (N34677) NOTE: Relief valve seal kit available (not shown). See parts list for part number. QTY. PART # DESCRIPTION N142316 VALVE, RELIEF 500 PSI (INCLUDED WITH N34677) N142314 VALVE, RELIEF 4200 PSI (INCLUDED WITH N34677) N142318 KIT, VITON VALVE SEAL (NOT SHOWN) Carbide Cutter OM...

  • Page 54: Hydraulic Motor, Variable 80Cc To 110Cc (N38488)

    Parts Identification Hydraulic Motor, Variable 80cc to 110cc (N38488) NOTE: Other items included in kit should only be replaced by authorized service center. QTY. PART # DESCRIPTION N28376 SEAL KIT (Includes Items 1, 2, 3, and 4) O-RING 194.1 X 3 V80 / 220 X 3 V80 O-RING 144.5 X 3 V70 / 168 x 3 V70 SHAFT SEAL 60 X 80 X 6 O-RING 114.5 X 3 V80...

  • Page 55: Overhung Load Adapter (N51193)

    Parts Identification Overhung Load Adapter (N51193) QTY. PART # DESCRIPTION N28447 FRONT SEAL HOUSING 900 N14118 PLUG #6 BOSS N16578 PLUG #4 BOSS N34130 BEARING CUP N34131 BEARING CONE SHAFT 915-13S N38542 REAR SEAL N38541 WAVE SPRING SSB-0433 N38543 O-RING 2-248 REAR ADAPTER PLATE N28529 SCREW SHCS 0.500-13 X 1.25 LG...

  • Page 56: Hydraulic Motor, 62.9Cc (N34676)

    Parts Identification Hydraulic Motor, 62.9cc (N34676) † † Item 4 Top of wear-plate Item 3 (Item 5) Wear-plate seal assembly orientation. 5/16" - 18 UNC threads (2 places) Holes to be used to aid in front cover removal QTY. PART # DESCRIPTION N144330 SEAL KIT (Includes Items 1, 2, 3, 4)

  • Page 57: Overhung Load Adapter (N16416)

    Parts Identification Overhung Load Adapter (N16416) QTY. PART # DESCRIPTION N14151 SEAL, FRONT (1.50" I.D. X 2.13" O.D. X .312" THK) N14152 CUP, BEARING N14153 CONE, BEARING N14156 RING, RETAINING N14157 SEAL, REAR (55MM X 90MM X 10MM) N14158 GASKET Carbide Cutter OM...

  • Page 58: Rotor (W/Double Carbide Teeth) 61" (N38536), 71" (N47831)

    Parts Identification Rotor (w/Double Carbide Teeth) 61" (N38536), 71" (N47831) * Use copper based anti-seize. Torque to 137 ft.-lbs. Tighten top bolt (Item 4) first. QTY. PART # DESCRIPTION N38537 ROTOR, 61" CARBIDE SPIRAL W / O CUTTERS N47832 ROTOR, 71" CARBIDE SPIRAL W / O CUTTERS N15510 TOOTH, DOUBLE CARBIDE (61") N15510...

  • Page 59: Rotor (W / Quadco Planer Teeth) 61" (N78331), 71" (N38522)

    Parts Identification Rotor (W / Quadco Planer Teeth) 61" (N78331), 71" (N38522) * Use copper based anti-seize. Torque to 137 ft.-lbs. Tighten top bolt (Item 5) first. QTY. PART # DESCRIPTION N38537 ROTOR, 61" CARBIDE SPIRAL W / O CUTTERS N47832 ROTOR, 71"...

  • Page 60: Tooth Assembly, Quadco Planer (N24281)

    Parts Identification Tooth Assembly, Quadco Planer (N24281) QTY. PART # DESCRIPTION N24279 TOOTH, QUADCO PLANER N24139 HOLDER, TOOTH QUADCO PLANER N17041 WASHER, LOCK 5/8" N26490 SCREW, SHCS 5/8"-18UNF X 3-1/4" N17036 SCREW, SHCS 5/8"-18UNF X 2" Carbide Cutter OM...

  • Page 61: Rear Cutter Bar 61" (N20281), 71" (N21908)

    Parts Identification Rear Cutter Bar 61" (N20281), 71" (N21908) NOTE: Underside of carbide cutter shown. QTY. PART # DESCRIPTION N38534 PLATE, 61" CARBIDE CUTTER N41754 PLATE, 71" CARBIDE CUTTER 4062 WASHER, 2" OD X 11/16" ID X 1/4 T (61") 4062 WASHER, 2"...

  • Page 62: Manual Holder

    Parts Identification Manual Holder 2, 3 QTY. PART # DESCRIPTION N82086 OPERATORS MANUAL 4000 BOLT, 1/4" X 1" GRADE 5 4050 NUT, 1/4" LOCK N19600 HOLDER, 01-315A STND. MANUAL Carbide Cutter OM...

  • Page 63: Machine Decals And Signs

    Parts Identification Machine Decals and Signs Part No. N28385 NOTE: All safety related decals are also shown in the Safety Instructions Section along with their location on the machine. See “Safety Decal Locations” on page 9. Check and replace any worn, torn, hard to read or missing decals on your machine.
  • Page 64 Parts Identification Machine Decals and Signs (Cont’d) Part No. N68724 Part No. N24823 Part No. N24822 DANGER ALWAYS OPERATE CUTTER HEAD AS LOW AS POSSIBLE. LIFTING OR TILTING BACK INCREASES THE RISK FROM FLYING DEBRIS. N68724 Part No. N28010 Part No. 4256 Part No.
  • Page 65 Parts Identification Machine Decals and Signs (Cont’d) Part No. N26973 Part No. N28576 Part No. N33105 Part No. N38515 Part No. N68418 Carbide Cutter OM...
  • Page 66 Carbide Cutter OM...

  • Page 67: Appendix

    Appendix Specifications DESCRIPTION CARBIDE CUTTER Cutting Width 61 in. (154.9 cm) 71 in. (180.3 cm) Operating Capacity 6 in. (15.2 cm) Continuous 10 in. (25.4 cm) Intermittent Capacity Monitor Pressure Gauge Motor Variable Displacement Or High Pressure Gear Rotor Bearing 2.1875 in.

  • Page 68: Dimensions

    Appendix Dimensions CARBIDE CUTTER DESCRIPTION Cutting Width (A) 61 in. (155 cm) 71 in. (180.3 cm) Overall Width (B) 76.2 in. (193.5 cm) 86.2 in. (220 cm) Operating Height (C) 37.71 in. (95.8 cm) 37.71 in. (95.8 cm) Overall Length (D) 37.09 in.

  • Page 69: Torque Specifications

    Appendix Torque Specifications Inches Hardware and Lock Nuts TORQUE CHARTS Minimum Hardware Tightening Torques Normal Assembly Applications (Standard Hardware and Lock Nuts) Nominal Unplated Plated Unplated Plated Unplated Plated Grade Grade Size W / ZnCr W / ZnCr W / ZnCr W / Gr.

  • Page 70: Metric Hardware And Lock Nuts

    Appendix Torque Specifications (Cont’d) Metric Hardware and Lock Nuts TORQUE CHARTS Minimum Hardware Tightening Torques Normal Assembly Applications (Metric Hardware and Lock Nuts) Class 5,8 Class 8,8 Class 10,9 Lock nuts Nominal Unplated Plated Unplated Plated Unplated Plated Class 8 Size W / ZnCr W / ZnCr...
  • Page 72 Loftness Specialized Equipment, Inc. 650 So. Main Street • PO Box 337 • Hector, MN 55342 Tel: 320.848.6266 • Fax: 320.848.6269 • Toll Free: 1.800.828.7624 Printed in USA © Loftness 2017...

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