Woodland Mills WG28 PRO Operator's Manual

Pto stump grinder

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WG28 PRO PTO STUMP GRINDER

OPERATOR'S MANUAL

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Page 1 WG28 PRO PTO STUMP GRINDER OPERATOR’S MANUAL...
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Page 3: Table Of Contents
WG28 PRO Operator’s Manual TABLE OF CONTENTS TABLE OF CONTENTS __________________________________________________1 INTRODUCTION ________________________________________________________3 SAFETY, WARNING & INFORMATION SYMBOLS _____________________________4 INTENDED USE ________________________________________________________5 TECHNICAL SPECIFICATIONS ____________________________________________5 TOOLS REQUIRED ___________________________________________________5 OVERALL DIMENSIONS _______________________________________________6 3-POINT HITCH DIMENSIONS __________________________________________7 GENERAL SAFETY RULES_______________________________________________8 PERSONAL SAFETY ____________________________________________________9...
Page 4 WG28 PRO Operator’s Manual STARTUP__________________________________________________________30 STUMP GRINDING PROCEDURE ______________________________________33 INCORRECT GRINDING PROCEDURES_________________________________34 PULLING THROUGH THE CENTRE _____________________________________34 GRINDING LEFT-TO-RIGHT ___________________________________________34 CHAINSAW HOLDER ________________________________________________35 STORAGE _________________________________________________________35 MAINTENANCE _______________________________________________________36 REPLACING TEETH _________________________________________________36 GREASING ________________________________________________________37 BEARINGS & OUTPUT SHAFT _________________________________________37 PTO SHAFT _________________________________________________________38...
Page 5: Introduction
WG28 PRO Operator’s Manual INTRODUCTION Congratulations on your purchase and welcome to Woodland Mills! This manual gives you the necessary information about your machine so you will be able to use it properly. The entire manual must be read and understood before you start using the machine. If any questions should arise that are not covered by this manual, please contact Woodland Mills Inc.
Page 6: Safety, Warning & Information Symbols
WG28 PRO Operator’s Manual SAFETY, WARNING & INFORMATION SYMBOLS Throughout this operator’s manual there are safety, warning, and information symbols. Please heed and obey all warnings. Symbol Description Refer to instruction/operator’s manual Wear protective gloves Wear safety footwear Wear eye protection...
Page 7: Intended Use
WG28 PRO Operator’s Manual INTENDED USE This stump grinder is designed for grinding stumps using a tractor’s Power Take-Off (PTO) at an operating rpm of 540. TECHNICAL SPECIFICATIONS Item Specification Tractor Compatibility Category 1 or 2 Recommended Horsepower 35 - 80 hp...
Page 8: Overall Dimensions
WG28 PRO Operator’s Manual OVERALL DIMENSIONS  0009988-M-EN: Rev A Page 29-Feb-2024...
Page 9: 3-Point Hitch Dimensions
WG28 PRO Operator’s Manual 3-POINT HITCH DIMENSIONS  0009988-M-EN: Rev A Page 29-Feb-2024...
Page 10: General Safety Rules
WG28 PRO Operator’s Manual GENERAL SAFETY RULES WARNING! Read and understand all instructions. Failure to follow all instructions listed below may result in electric shock, ﬁre, and/or serious injury. WARNING! The warnings, cautions, and instructions discussed in this instruction manual cannot cover all possible conditions or situations that could occur.
Page 11: Personal Safety
WG28 PRO Operator’s Manual PERSONAL SAFETY • Stay alert, watch what you are doing and use common sense when operating machinery. Do not use a machine when you are tired or under the inﬂuence of drugs, alcohol, or medication. A moment of inattention while operating machinery may result in serious personal injury.
Page 12: Machine Use And Care
WG28 PRO Operator’s Manual MACHINE USE AND CARE • Always be sure the operator is familiar with proper safety precautions and operation techniques before using machine. • Do not force the machine. Machines do a better and safer job when used in the manner for which they are designed.
Page 13: Component Lists
WG28 PRO Operator’s Manual COMPONENT LISTS Verify all component and hardware quantities are correct prior to assembling the stump grinder. 40.64 40.64 1-5/8 1-5/8 Draw Speed Chainsaw 20.32 20.32 Indicator Gauge Holder 13/16 13/16 [0009993] Assembly 40.64 40.64 1-5/8 1-5/8...
Page 14: To-Scale Hardware
WG28 PRO Operator’s Manual TO-SCALE HARDWARE BOLTS & SCREWS Hardware graphics are printed at 1:1 scale for ease of identiﬁcation. Simply place the hardware over the image in the tables to verify it is the correct size. HHB-MBM075FCJ M10 X 1.5 X 20 mm HEX BOLT HHB-MBM085FCJ M10 X 1.5 X 30 mm HEX BOLT...
Page 15: Washers
WG28 PRO Operator’s Manual WASHERS FTW-MBA000AJ FTW-MBM000AJ M5 FLAT WASHER M10 FLAT WASHER FTW-MBR000AJ M12 FLAT WASHER SLW-MBAAJ SLW-MBMAJ M5 SPLIT LOCK WASHER M10 SPLIT LOCK WASHER NUTS HLN-MBACH HLN-MBMCH M5 X 0.8 LOCK NUT M10 X 1.5 LOCK NUT HLN-MBRCH M12 X 1.75 LOCK NUT...
Page 16: Assembly
WG28 PRO Operator’s Manual ASSEMBLY 1. UNPACKING Unfasten the M8 X 25 mm hex bolts from the four (4) bottom corners of the crate and remove the top frame. Unfasten the two (2) M8 X 25 mm hex bolts securing both support legs to the bottom crate frame.
Page 17: Draw Speed Indicator
WG28 PRO Operator’s Manual 2. DRAW SPEED INDICATOR Using the hardware listed below, assemble the draw speed indicator and indicator gauge to the ﬂywheel housing and back frame respectively. 40.64 1-5/8 M10 X 20 mm Draw Speed 20.32 Hex Bolt...
Page 18 WG28 PRO Operator’s Manual Using four (4) M10 X 20 mm hex bolts, four (4) M10 lock washers, and four (4) M10 ﬂat washers, assemble the indicator to the housing and then the indicator gauge to the back frame. With all the fasteners tight, the “GO” text should be centred in the indicator view window.
Page 19: Deflector
13/16 40.64 1-5/8 WG28 PRO Operator’s Manual 3. DEFLECTOR 20.32 13/16 Using the hardware listed below, assemble the deﬂector to the ﬂywheel housing. M12 X 35 mm M12 Lock Nut Hex Bolt 40.64 1-5/8 20.32 M12 Flat Deﬂector 13/16 Washer Assembly Using three (3) M12 X 35 mm bolts, three (3) M12 ﬂat washers, and three (3) M12 lock nuts,...
Page 20: Chainsaw Holder
WG28 PRO Operator’s Manual 40.64 4. CHAINSAW HOLDER 1-5/8 Using the hardware listed below, assemble the chainsaw holder to the back frame. 20.32 M10 X 30 mm 13/16 M10 Lock Nut Hex Bolt 40.64 1-5/8 Chainsaw 20.32 M10 Flat 20.32...
Page 21: Manual Tube
WG28 PRO Operator’s Manual 40.64 5. MANUAL TUBE 1-5/8 Using the hardware listed below, assemble the manual tube to the back frame as shown. 20.32 M5 X 16 mm 13/16 Phillips Pan M5 Lock Nut Head Screw 40.64 1-5/8 M5 Split Lock Manual Tube 20.32...
Page 22: Trimming The Pto Shaft
1 at the lowest and 1 at the highest 3-point hitch position.** HORIZONTAL Hold the stump grinder at whichever position yields the shortest distance. WARNING! Remove the tractor’s draw bar—if equipped—before installing any Woodland Mills implement (Wood Chipper or Stump Grinder). 0009988-M-EN: Rev A Page 29-Feb-2024...
Page 23: Separate Pto Halves
WG28 PRO Operator’s Manual 2. SEPARATE PTO HALVES Pull the PTO shaft apart until it is two separate halves: inner and outer. Guard Tube End Locking Pin Outer Half Inner Half Shroud Collar 3. ATTACH THE PTO SHAFT Attach the slip clutch end to the stump grinder and the outer half to the tractor as separate pieces.
Page 24 WG28 PRO Operator’s Manual Scenario 2. If the distance between the shroud collar and the guard tube end is between 0 and 1 in [25 mm], the PTO shaft requires a 1 in [25 mm] trim. Proceed to Step 5 using 1 in [25 mm] as the “Trim Length”.
Page 25: Trim The Pto Shaft
WG28 PRO Operator’s Manual 5. TRIM THE PTO SHAFT Remove both halves of the PTO shaft from the tractor and stump grinder. Trim both outer plastic guards and both inner triangular steel shafts by the “Trim Length”. Trim the plastic guards ﬁrst, taking care not to cut into the triangular shafts inside.
Page 26: Pto Shaft Clutch Run-In
WG28 PRO Operator’s Manual PTO SHAFT CLUTCH RUN-IN The stump grinder is shipped with a slip clutch PTO shaft. Follow the steps below before using your stump grinder to ensure the PTO shaft clutch friction plates are set properly. **This procedure should be performed periodically throughout ownership as the friction plates can stick together—particularly after long periods of inactivity—which could...
Page 27 WG28 PRO Operator’s Manual 4. Start the tractor and engage the PTO for 2-3 seconds to permit slippage of clutch surfaces. Disengage the PTO then re-engage a second time for 2-3 seconds. Disengage the PTO again, shut off the tractor, and remove the key. Wait for all components to stop rotating before removing the PTO shaft from tractor.
Page 28: Flywheel Tooth Torquing
WG28 PRO Operator’s Manual FLYWHEEL TOOTH TORQUING Prior to each operation, ensure all 44 teeth are torqued to 160 ft•lb [215 N•m] using a torque wrench with a 24 mm socket. See section, TORQUE ADAPTER, on next page for instructions on torquing the four (4) outward- pointing teeth located 90°...
Page 29: Torque Adapter
WG28 PRO Operator’s Manual TORQUE ADAPTER The stump grinder ships with a 24 mm torque adapter to assist torquing the four (4) outward- pointing teeth. It connects directly to a ½ in drive torque wrench. Use a ⅜-to-½ in socket adapter if the torque wrench is ⅜...
Page 30 WG28 PRO Operator’s Manual Slide the torque adapter and torque wrench over the nut and torque the nut by rotating it clockwise. Repeat the process for all four (4) of the outward-pointing teeth. Ensure the torque adapter remains 90° to the torque wrench throughout the entire process.
Page 31: Operation
WG28 PRO Operator’s Manual OPERATION PRE-START CHECKLIST 1. Prior to operation, ensure all 44 teeth are torqued to 160 ft•lb [215 N•m] using a torque wrench with a 24 mm socket. Refer to the “FLYWHEEL TOOTH TORQUING” section of the operator’s manual.
Page 32: Startup
WG28 PRO Operator’s Manual STARTUP WARNING! To avoid death or serious injury, do not grind stumps containing embedded foreign objects such as nails, wire, metal fragments, etc. Wear heavy-duty work gloves, ANSI-approved goggles behind a full face shield, steel-toed work boots, and a dust mask.
Page 33 WG28 PRO Operator’s Manual Remove the leg locking pins and their linch pins, slide the legs up inside the back frame tubes, then reinstall the pins to secure the legs in place. Locking Pins 0009988-M-EN: Rev A Page 29-Feb-2024...
Page 34 During use, it is important to never let the stump grinder sway to such an extreme angle where the suspension gets fully compressed. The WG28 PRO stump grinder is designed to pull through stumps in a swayed draw orientation, however, the grinding effectiveness is diminished the more it sways.
Page 35: Stump Grinding Procedure
WG28 PRO Operator’s Manual STUMP GRINDING PROCEDURE The ﬂywheel spins clockwise (when facing the rear of the machine) with the effective cutting area in the lower-left quadrant as shown below: Left Right Effective cutting area When grinding a tree stump, always start from the right side of the stump, moving incrementally to the left, pulling the grinder straight forward through the stump on each pass.
Page 36: Incorrect Grinding Procedures
WG28 PRO Operator’s Manual INCORRECT GRINDING PROCEDURES It is critical that the stump grinder is never pulled through the centre of a stump or ground from left-to-right. This will induce severe vibration and cause the grinder to sway and bounce. It may also damage the machine and/or break teeth.
Page 37: Chainsaw Holder
WG28 PRO Operator’s Manual CHAINSAW HOLDER Use the chainsaw holder only during transport. Always remove the chainsaw from the holder prior to grinding stumps. STORAGE 1. Lower both support legs and reinsert the locking pins. 2. Lower the stump grinder onto a ﬂat, level surface.
Page 38: Maintenance
WG28 PRO Operator’s Manual MAINTENANCE • Proper routine maintenance is critical to operator safety, achieving proper stump grinding results, and prolonging the life of the machine. • Before cleaning and/or any maintenance is performed on the stump grinder, always turn off the tractor engine and disconnect the PTO shaft.
Page 39: Greasing
WG28 PRO Operator’s Manual GREASING BEARINGS & OUTPUT SHAFT The stump grinder has ten (10) grease points: two (2) ﬂywheel bearings, two (2) hinge pins, and six (6) on the PTO shaft. Check each grease point prior to use and add grease as needed.
Page 40: Pto Shaft
WG28 PRO Operator’s Manual PTO SHAFT The PTO shaft has six (6) grease points that accessible from the outside: two (2) on the clutch yoke journal, one (1) on each of the inner and outer guards, and two (2) on the tractor yoke journal.
Page 41: Pto Shaft Guard Replacement
WG28 PRO Operator’s Manual PTO SHAFT GUARD REPLACEMENT If the PTO shaft guards are damaged or the guard bearings require replacement due to wear, follow the instructions below to replace them. 1. Separate the PTO shaft into its two halves by pulling it apart.
Page 42 WG28 PRO Operator’s Manual 4. Slide the guard assembly off the shaft. 5. Stretch the guard bearing apart at its split and pull it out of the groove in the yoke collar. Pull bearing apart to remove it from groove 6.
Page 43: Replacement Parts Ordering
Record the part number (e.g. 0001071, HHB-MBM080FCJ, etc.) in the “Part No.” column. Contact Woodland Mills through the website or via phone/email. If possible, include the invoice or sales number from the purchased product so an associated account can be located. If the account has multiple addresses on ﬁle, please indicate to which address the replacement...
Page 44: Exploded Assembly Views
WG28 PRO Operator’s Manual EXPLODED ASSEMBLY VIEWS COMPLETE ASSEMBLY  0009988-M-EN: Rev A Page 29-Feb-2024...
Page 45: Back Frame
WG28 PRO Operator’s Manual BACK FRAME  0009988-M-EN: Rev A Page 29-Feb-2024...
Page 46: Flywheel Housing
WG28 PRO Operator’s Manual FLYWHEEL HOUSING  44 2X 40 4X 49 4X 60 4X 49 4X 40 4X 0009988-M-EN: Rev A Page 29-Feb-2024...
Page 47: Flywheel
WG28 PRO Operator’s Manual FLYWHEEL  0009988-M-EN: Rev A Page 29-Feb-2024...
Page 48: Deflector & Chainsaw Holder
WG28 PRO Operator’s Manual DEFLECTOR & CHAINSAW HOLDER  47 2X 36 2X 0009988-M-EN: Rev A Page 29-Feb-2024...
Page 49: Pto Shaft
WG28 PRO Operator’s Manual PTO SHAFT  0009988-M-EN: Rev A Page 29-Feb-2024...
Page 50: Parts List
27.5 0010592 TRIANGULAR YOKE PIN KIT, PTO SLIP CLUTCH, 7NS-SERIES 0006495 LABEL, SERIAL NUMBER, PTO 0010413 LABEL, WG28 PRO W/ WOODLAND MILLS LOGO 0010414 LABEL, WG28 PRO 0008937 LABEL, PRO SERIES UCF212 FLANGE BEARING, SQ, 4-BOLT, 60 mm SFT, 143 mm C-C HHB-MBE095FCJ HEX HEAD BOLT, CLS 8.8, M6 X 1, 40 mm LG, FULL...
Page 51 WG28 PRO Operator’s Manual Item Part No. Description SHLDR SCREW, HEX HEAD, ALLOY, 21 X 118 mm LG SHLDR, M20 X 2.5 X 32 mm LG HHS-MCF068173AJ PPH-MBA071FCE SCREW, PPH, CLS 4.8, M5 X 0.8, 16 mm LG, FULL KCS-MBN059GR SET SCREW, KNURLED CUP POINT, GR 45H, M10 X 1.25, 10 mm LG...
Page 52: Notes
WG28 PRO Operator’s Manual NOTES 0009988-M-EN: Rev A Page 29-Feb-2024...
Page 53 WG28 PRO Operator’s Manual 0009988-M-EN: Rev A Page 29-Feb-2024...
Page 54 WG28 PRO Operator’s Manual 0009988-M-EN: Rev A Page 29-Feb-2024...
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