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

Carbide cutter
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N38489 Rev. F
Carbide Cutter
61G4 • 71G4
Owner's Manual and Parts Book
(Originating w/Serial Number 42-1666)
Model Number:
Serial Number:
Date of Purchase:
N38517 (61" Double Carbide)
N38518 (61" Quadco)
N101958 (61" Double Carbide)
N101960 (61" Quadco)
N38440 (71" Double Carbide)
N38516 (71" Quadco)
07.23.18

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Summary of Contents for LOFTNESS 61G4

  • Page 1 Carbide Cutter 61G4 • 71G4 Owner’s Manual and Parts Book (Originating w/Serial Number 42-1666) N38517 (61" Double Carbide) Model Number: N38518 (61" Quadco) N101958 (61" Double Carbide) N101960 (61" Quadco) N38440 (71" Double Carbide) N38516 (71" Quadco) Serial Number: Date of Purchase: N38489 Rev.

  • Page 3: Table Of Contents

    Table of Contents Warranty Table of Contents Introduction Owner Information ............1 Warranty Policy .
  • Page 4 Table of Contents Maintenance (Cont’d) Storage ..............23 End of Season .

  • Page 5: 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 6: 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 (1600 – 2200 RPM) •...

  • Page 7: 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 8: 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 9: 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 10: Carbide Cutter Identification

    Safety Instructions Carbide Cutter Identification Carbide Cutter OM...

  • Page 11: Safety Decal Locations

    Safety Instructions Safety Decal Locations Check and replace any worn, torn, hard to read or DANGER missing safety decals on your machine. ALWAYS OPERATE CUTTER HEAD AS LOW AS POSSIBLE. LIFTING OR TILTING BACK INCREASES THE RISK FROM FLYING DEBRIS. N68724 Part No.
  • Page 12 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 13 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 14 Carbide Cutter OM...

  • Page 15: 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 16: Installing The Carbide Cutter To The Loader

    Set-up Instructions Installing the Carbide Cutter to the Fully lower the attachment-locking levers on the loader mounting plate. Loader WARNING: Locking-wedge pins must extend through the holes in attachment-mounting plate. Levers must be fully down in the locked over-center position. Failure to secure wedge pins can allow attachment to come off, causing serious injury or death.

  • Page 17: Checking Rotor Rotation

    Set-up Instructions Checking Rotor Rotation Checking Rotor Speed Raise the carbide cutter off the ground and place blocks (1) underneath the skids. Lower the carbide cutter down Remove right side belt cover. Apply a small piece of on the blocks. reflective tape (1) to the outer edge of the lower sheave.

  • Page 18: Skid Adjustment

    Set-up Instructions Skid Adjustment Cutter Bar Adjustment NOTE: The cutter bar can be adjusted back or forward to NOTE: The skid(s) can be adjusted to increase or increase or decrease the distance between the decrease the distance between the ground and bar and the rotor.

  • Page 19: 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 20: 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 21: 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 22: Lubrication

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

  • Page 23: 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 20 for instructions. Use a #2 general purpose lithium based grease unless noted otherwise. NOTE: Replace any broken or missing grease fittings.

  • Page 24: 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 25: 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 26: 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 27: 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 18. • Make a list of all worn or damaged parts and replace them.

  • Page 28: 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 29: Parts Identification

    Parts Identification PARTS IDENTIFICATION Carbide Cutter OM...

  • Page 30: Carbide Cutter Body Assembly

    Parts Identification Carbide Cutter Body Assembly 9,10,11 Parts breakdown of item 5 (N70772) is on page 31. Carbide Cutter OM...
  • Page 31 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 N70770 SHIELD, MOTOR 4195 BOLT, 3/8" X 1" GRADE 5 N37756 WASHER, NORD-LOCK 3/8"...

  • Page 32: 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 33 Parts Identification Carbide Cutter Body Assembly (Cont’d) QTY. PART # DESCRIPTION N89749 COVER, BELT 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 34: Belt And Sheaves

    Parts Identification Belt and Sheaves For model numbers N38517 N38518 N38440 N38516 For model numbers N101958 N101960 QTY. PART # DESCRIPTION SPROCKET, 14MM 43 TOOTH 37 N34647 (Used for model numbers N38517, N38518, N38440, and N38516) SPROCKET, 14MM 45 TOOTH 37 N47578 (Used for model numbers N38517, N38518, N38440, and N38516)

  • Page 35: Motor Shield W/Gauge (N70770)

    Parts Identification Motor Shield w/Gauge (N70770) QTY. PART # DESCRIPTION N70772 COVER, MOTOR 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 N16334...

  • Page 36: Hydraulics

    Parts Identification Hydraulics 39,40 (Tank) 25 (Tank) 25 (Pressure) (Tank) 14 15 (Pressure) * Parts breakdown of item 26 (N21669) is on page 36. (Pressure) Carbide Cutter OM...
  • Page 37 Parts Identification Hydraulics 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" X 2-1/4" GRADE 5 N16474 WASHER, 3/4 NORDLOCK N38488...

  • Page 38: Hydraulics (Cont'd)

    Parts Identification Hydraulics (Cont’d) 39,40 (Tank) 25 (Tank) 25 (Pressure) (Tank) 14 15 (Pressure) * Parts breakdown of item 26 (N21669) is on page 36. (Pressure) Carbide Cutter OM...
  • Page 39 Parts Identification Hydraulics (Cont’d) QTY. PART # DESCRIPTION N13811 BOLT, 1/4" X 2-3/4" GRADE 5 N28249 COUPLER, 3/4 FEM FLAT -16FORB (Used for model numbers N38517, N38518, N38440, and N38516) N34614 COUPLER, 1/2 FEM FLAT -12FORB ( Used for model numbers N101958 and N101960) N28250 COUPLER, 3/4 MALE FLAT -16FORB (Used for model numbers N38517, N38518,...

  • Page 40: 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 41: 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 42: 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 43: 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 44: 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 45: 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 46: 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 47: Manual Holder

    Parts Identification Manual Holder 2, 3 QTY. PART # DESCRIPTION N38489 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 48: 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 7. Check and replace any worn, torn, hard to read or missing decals on your machine.
  • Page 49 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. N28384 Part No. N33105 Part No.
  • Page 50 Carbide Cutter OM...

  • Page 51: 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 Rotor Bearing 2.1875 in. Piloted Double Taper Rotor Tip Diameter 17 in.

  • Page 52: 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 53: 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 54: 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 56 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 2018...

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71g4

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