Wood-mizer LT20 DH Series User Manual
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Wood-mizer LT20 DH Series User Manual

Wood-mizer LT20 DH Series User Manual

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Summary of Contents for Wood-mizer LT20 DH Series

  • Page 1 Table of Contents Section-Page Table of Contents SW-07doc0328171...
  • Page 3 Wood-Mizer ® Sawmill Safety, Setup, Operation & Maintenance Manual LT20 Series DH rev. E3.09 LT20 Series DH Wide rev. E3.09 Safety is our #1 concern! Read and understand all safety information and instructions before oper- ating, setting up or maintaining this machine.

  • Page 4: Table Of Contents

    Table of Contents Section-Page Form #629 SECTION 1 SAFETY & GENERAL INFORMATION Blade Handling..................1-2 Sawmill Setup..................1-2 Sawmill Operation..................1-2 Sawmill Maintenance ................1-4 Safety Instructions ..................1-5 Belt Sizes ....................1-14 Blade Sizes ...................1-15 Log Dimensions..................1-15 Cutting Capacity...................1-16 1.10 Engine/Motor Specifications ..............1-16 1.11 Noise Level...................1-17 1.12 Overall Dimensions ................1-17 1.13...
  • Page 5 Table of Contents Section-Page SECTION 3 MAINTENANCE Wear Life....................3-1 Blade Guides ..................3-1 Sawdust Removal ...................3-2 Carriage Track, Wiper & Scrapers ............3-2 Vertical Mast Rails .................3-3 Miscellaneous ..................3-4 Blade Tensioner..................3-4 Blade Wheel Belts ..................3-5 Brake Pads Adjustment ( Gas / Diesel Sawmills Only ) ......3-5 3.10 Drive Belt Adjustment ................3-6 3.11...
  • Page 6 Table of Contents Section-Page 5.18 Saw Head Tilt ..................5-30 5.19 Blade Height Scale Adjustment............5-32 SW-07doc062424Table of Contents...
  • Page 7 Take notice of all safety warnings throughout this manual and those posted on the machine. Keep this manual with this machine at all times, regardless of ownership. *Wood-Mizer ® is a registered trademark of Wood-Mizer Products, Inc.
  • Page 8 Sawmill and Customer Identification Each Wood-Mizer sawmill has a 17-digit Vehicle Identification Number (VIN). See the figure below for VIN locations. See the chart for VIN description. V.I.N. LOCATIONS. F9 017 F9 .01 V.I.N. DESCRIPTION...
  • Page 9 Each sawmill is also identified with a model number which includes the base model and the engine/motor configuration. See the figure for a description of the model number. LT20 Engine/Motor Basic Sawmill I.D. Configuration MODEL NUMBER DESCRIPTION. When you pick up your mill, you will receive a customer number. Both the VIN and your customer number expedite our service to you.
  • Page 10 Table of Contents Section-Page SW-07doc062424Table of Contents...

  • Page 11: Getting Service

    General Contact Information Getting Service Wood-Mizer is committed to providing you with the latest technology, best quality and strongest customer service available on the market today. We continually evaluate our customers’ needs to ensure we’re meeting current wood-processing demands. Your comments and suggestions are welcome.
  • Page 12 Branches & Authorized Sales CentersWood-Mizer Locations (North and South America) Branches & Authorized Sales CentersWood-Mizer Locations (North and South America) EUROPE UNITED STATES European Headquarters World Headquarters Wood-Mizer Industries Sp. z o.o. Wood-Mizer LLC Nagórna 114, 62-600 Koło, Poland 8180 West 10th Street Tel.: +48-63-26-26-000 Indianapolis,Indiana 46214-2400, Fax: +48-63-27-22-327 www.woodmizer.eu...
  • Page 13 Branches & Authorized Sales CentersWood-Mizer Locations (North and South America) CROATIA Krešimir Pregernik ITALY Pasquale Felice SERBIA Dragan Markov Pregimex d.o.o. Wood-Mizer Italia Srl Wood-Mizer Balkan d.o.o. S. Batušiæa 31, 10090 Zagreb Cda. Capoiaccio SN Svetosavska GA 3/3; P. Fah 25 Tel.:/Fax: +3851-38-94-668...
  • Page 14 Robert Moxham DENMARK Kevin Christiansen TRANSILVANIEI Nr. 5 Regional Direction - Asia Kevin Christiansen's Sibiu, Cisnadie 555300 Wood-Mizer Asia Manufacturing Co., Ltd. savværker PMV Tel.:/Fax: : +40-369-405-433 No.2, Gongyequ 40th Rd. Xitun District, Arnborgvej 40, 7330 Brande- Fasterholt GSM: +40-745-707-323 Taichung City, 40768, Taiwan, R.O.C.

  • Page 15: Section 1 Safety & General Information

    It is always the owner's responsibility to comply with all applicable federal, state and local laws, rules and regulations regarding the ownership, operation and towing of your Wood-Mizer sawmill. All Wood-Mizer mill owners are encouraged to become thoroughly familiar with these...

  • Page 16: Blade Handling

    Safety & General Information Blade Handling Blade Handling DANGER! Always disengage the blade and shut off the sawmill engine before changing the blade. Failure to do so will result in serious injury. WARNING! Always wear gloves and eye protection when handling bandsaw blades.
  • Page 17 Safety & General Information Sawmill Operation IMPORTANT! The operator of the sawmill should get adequate training in the operation and adjustment of the machine. DANGER! Make sure all guards and covers are in place and secured before operating or towing the sawmill. Failure to do so may result in serious injury.

  • Page 18: Sawmill Maintenance

    Safety & General Information Sawmill Maintenance CAUTION! Before loading a log, be sure the cutting head is moved far enough forward so the log does not hit it. Failure to do so may result in machine damage. CAUTION! Do not try to force the saw head beyond its upper and lower travel limits.

  • Page 19: Safety Instructions

    It is always the owner's responsibility to comply with all applicable federal, state and local laws, rules and regulations regarding the ownership and operation of your Wood-Mizer sawmill. All Wood-Mizer sawmill owners are encouraged to become thoroughly familiar with these applicable laws and comply with them fully while using the machine.
  • Page 20 Safety & General Information Wear Safety Clothing 1.5.1 Wear Safety Clothing WARNING! Secure all loose clothing and jewelry before operating the sawmill. Failure to do so may result in serious injury or death. WARNING! Always wear gloves and eye protection when handling bandsaw blades.
  • Page 21 Safety & General Information Keep Persons Away 1.5.1 Keep Persons Away DANGER! Keep all persons out of the path of moving equipment and lumber when operating the sawmill. Failure to do so will result in serious injury. DANGER! Always be sure all persons are out of the path of the blade before starting the motor.
  • Page 22 Safety & General Information Use Proper Maintenance Procedures DANGER! Hazardous voltage inside the electric boxes and at the motor can cause shock, burns, or death. Disconnect and lock out power supply before servicing! Keep all electrical component covers closed and securely fastened during sawmill operation. WARNING! Consider all electrical circuits energized and dangerous.
  • Page 23 Safety & General Information Keep Safety Labels In Good Condition 1.5.1 Keep Safety Labels In Good Condition IMPORTANT! Always be sure that all safety decals are clean and readable. Replace all damaged safety decals to prevent personal injury or damage to the equipment. Contact your local distributor, or call your Customer Service Representative to order more decals.
  • Page 24 Safety & General Information Keep Safety Labels In Good Condition TABLE 1-1 099219 Blade tension. Turning the bolt clockwise will increase the blade tension and turning the bolt counterclockwise will decrease the tension. 099219 099221 CAUTION! Keep all persons a safe distance away from work area when operating the machine.
  • Page 25 Safety & General Information Keep Safety Labels In Good Condition TABLE 1-1 096319 CAUTION! Disconnect power supply before opening the box. 099222 CAUTION! Sawdust outlet. Protect eyes! 099542 CAUTION! Trailer 099542 086099 CAUTION! Hot elements, keep your distance! 086099 096321 Blade movement direction Safety &...
  • Page 26 Safety & General Information Keep Safety Labels In Good Condition TABLE 1-1 512234 Clean the chain of sawdust every 50 hours of operation or once a week 512234 512156 Lubricate the chain every 50 hours of operation or once a week. 512156 S12004G CAUTION! Always wear safety goggles...
  • Page 27 Safety & General Information Keep Safety Labels In Good Condition TABLE 1-1 501465 Caution! Wear foot protection when operating the machine! 501467 Lubrication point P11789 Aligning the blade on the wheels 589604 Setting the blade tension indicator WIDE 1,07 1000-1100 70-75 1,14 1100-1200...

  • Page 28: Belt Sizes

    3600 RPM S20097A Belt Sizes See Table 1-2. Belt sizes for the LT20 Series sawmill are shown. Description Belt Size Wood-Mizer Part # Motor Drive Belt E11, E15 & E20 2BX81 014819-2 Engine Drive Belt D22, D25 and G25 2BX84...

  • Page 29: Blade Sizes

    Safety & General Information Blade Sizes Blade Sizes The engine/motor type of your sawmill and the type of wood you saw should determine which blade you choose for optimum performance. See The Blade Handbook for blade hook angle, tooth height, and tooth set specifications. The LT20 sawmill can be equipped with a 32 mm wide blade.

  • Page 30: Cutting Capacity

    Safety & General Information Cutting Capacity Cutting Capacity See Table 1-4. The performance capacity of the LT20 series sawmill is listed below. Peak cutting rates are measured in 12” (30 cm) wide red oak and represent the capability of the sawmill only. Rates based on using Tru-Sharp 1 1/4”...

  • Page 31: Noise Level

    Safety & General Information Noise Level 1.11 Noise Level See Table 1-7. The average noise level is given in the table below Sawmill Noise Level LT20E15 = 79,6 dB (A) LT20D22 = 85,6 dB (A) LT20G25 = 88,1 dB (A) TABLE 1-7 The noise level measurement was taken in accordance with PN-EN ISO 9612 Standard.
  • Page 32 Safety & General Information Overall Dimensions See Figure 1-1. The LT20 S & M type frame sawmill’s operator position is shown below.. FIG. 1-1 See Figure 1-2. The LT20 M dimensions are shown below. FIG. 1-2 1-18 doc062424 Safety & General Information...

  • Page 33: Chains

    Safety & General Information Chains See Figure 1-3. The LT20 S dimensions are shown below. FIG. 1-3 1.13 Chains See Table 1-9. The load capacity of the chains is listed below. Load Capacity According to ISO No 08A-1 Up/Down Chain 4540 KG TABLE 1-9 Safety &...

  • Page 34: Dust Extractor Specifications

    Safety & General Information Dust Extractor Specifications 1.14 Dust Extractor Specifications See Table 1-4. Specifications of the dust extractors used on the resaw for each saw head are listed below. Airflow 1200 m 3937ft Inlet diameter 100 mm (5.9”) Motor power 1,5 kW Number of sacks 1 pcs...

  • Page 35: Hydraulic System

    Safety & General Information Hydraulic System 1.15 Hydraulic System See Table 1-1. The specifications of the hydraulic system are shown below. Hydraulic Pump #M-300-0230 Monarch Pressure Rating 17,25MPa (2500 PSI) Max. Pressure 19MPa (2750 PSI) RELIEF VALVE SETTING 2000 PSI LOADER CLAMP CLAMP...
  • Page 36 Safety & General Information Hydraulic System Log Loader Clamp Clamp Turner In/Out Up/Down Side Supports Front Rear Toe Board Toe Board (Shown with handles down) HD0137 FIG. 1-2 HYDRAULIC LAYOUT DIAGRAM 1-22 doc062424 Safety & General Information...

  • Page 37: Components

    Safety & General Information Components 1.16 Components The major components of the Wood-Mizer LT20 Series are shown below. Engine Saw Head Control Panel Blade Tensioner FIG. 1-3 1.17 LT20 Series A/DH Hydraulic Hoses Color LENGTH Application Wood-Mizer Code "A" Part No.
  • Page 38 Safety & General Information LT20 Series A/DH Hydraulic Hoses Plain 4.2m 3/8” SIDE SUPPORT CYLINDER BASE (LT40S) 087791 (166") 4.77m 3/8” SIDE SUPPORT CYLINDER BASE (LT40M) 087777 (188") Pink 4.2m 3/8” SIDE SUPPORT CYLINDER TOP (LT40S) 087791 (166") 4.77m 3/8” SIDE SUPPORT CYLINDER TOP (LT40M) 087777 (188") White...
  • Page 39 Safety & General Information LT20 Series A/DH Hydraulic Hoses BLUE 220" 1/4" REAR CLAMP UP/DOWN CYLINDER TOP (A/DH5) 094781 PLAIN 15" 3/8" HYDRAULIC VALVE TO OIL FLOW CONTROL VALVE 094782 (A/DH5) PLAIN 21" 3/8"HYDRAULIC PUMP W/MOTOR TO OIL FLOW CONTROL 087775 VALVE (A/DH5) 1,50...

  • Page 40: Section 2 Setup & Operation

    SETUP & OPERATION Sawmill Setup SECTION 2 SETUP & OPERATION Sawmill Setup IMPORTANT! Before starting to use the sawmill you have to meet the following conditions: Set up the sawmill on firm, level ground and level the sawmill. Secure the sawmill to the ...

  • Page 41: Stationary Sawmill Setup

    SETUP & OPERATION Stationary Sawmill Setup CAUTION! Press the emergency button located on the control box to stop the blade and the track feed motor. Turn the emergency stop clockwise to release the stop. The sawmill not restart until the emergency stop is not released.
  • Page 42 SETUP & OPERATION Stationary Sawmill Setup See Figure 2-3. FIG. 2-3. See Figure 2-4. FIG. 2-4. doc062424 SETUP & OPERATION...
  • Page 43 SETUP & OPERATION Stationary Sawmill Setup See Figure 2-5. Sawmill Mast Tilt 20_025_B 097237 FIG. 2-5. SETUP & OPERATION doc062424...
  • Page 44 SETUP & OPERATION Stationary Sawmill Setup See Figure 2-6. 3830 2040 2790 LT20 S Mobile Metric Dimensions* LT20 S Stationary Metric Dimensions* 1623 1762 2964 20_108C 2377 3055 LT20 M Mobile Metric Dimensions* LT20 M Stationary Metric Dimensions* *All dimensions in millimetres *All dimensions in millimetres FIG.
  • Page 45 SETUP & OPERATION Stationary Sawmill Setup See Figure 2-8. LT S Super FIG. 2-8. See Figure 2-9. LT M & LT M Super FIG. 2-9. SETUP & OPERATION doc062424...

  • Page 46: Portable Sawmill Setup

    SETUP & OPERATION Portable Sawmill Setup 1. Unhook the carriage safety chain, located at the bottom of the vertical mast. 2. Use the up/down crank or the up/down switch to raise the cutting head from the carriage rest pin. Swing the rest pin below bed level. 3.
  • Page 47 SETUP & OPERATION Portable Sawmill Setup See Figure 2-11. Adjustment Bolt Locking Pin Travel Lock Pin Outrigger Leg FIG. 2-11. OUTRIGGER ADJUSTMENT 4. Remove the fenders by lifting them out of the slots. CAUTION! When setting up the sawmill on boggy terrain (such as deep mud or sand), place a board or a metal plate under each outrigger leg to prevent the legs from sinking.
  • Page 48 SETUP & OPERATION Portable Sawmill Setup See Figure 2-12. Distance Block Stop Bolt FIG. 2-12. WARNING! Put front outrigger down before moving cutting head from the rest position. CAUTION! To prevent fender damage, remove fenders before operating sawmill or loading logs. 7.

  • Page 49: Middle Track Cover

    SETUP & OPERATION Middle Track Cover See Figure 2-13. Pivot End Rail Pivot End Rail Side Support Side Support Bed Rail Bed Rail Stop Block Stop Block SM0130 FIG. 2-13. Middle Track Cover Before operating the sawmill do as follows: 1.

  • Page 50: Replacing The Blade

    SETUP & OPERATION Replacing The Blade See Figure 2-14. Install the track cover and secure with two thumb screws FIG. 2-14. CAUTION! Install the track cover so that it lightly touches the track rail. If the wiper presses too firmly against the rail, it can cause the power feed to bind.

  • Page 51: Tensioning The Blade

    SETUP & OPERATION Tensioning The Blade Close the blade housing cover. Next, turn the tension handle until the blade is tensioned correctly. CAUTION! Should you need to adjust the blade position, never grab the wheel arms to spin the idle-side blade wheel as your fingers can get pinched.

  • Page 52: Tracking The Blade

    SETUP & OPERATION Tracking The Blade See Table 2-1. The recommended tension for different blades is shown below. Blade Type Blade Dimensions Tension range Width Height Length (mm) (mm) (cm) 401 (STANDARD) 2732 1.07 1000-1100 70-75 433 (WIDE) 401 (STANDARD) 3732 1.14 1100-1200...

  • Page 53: Hydraulic Control Operation

    SETUP & OPERATION Hydraulic Control Operation 6. After adjusting the tilt of the blade wheels with the cant adjustment bolt, tension the blade properly. 7. Close the blade housing cover. DANGER! Make sure all guards and covers are in place and secured before operating or towing the sawmill.
  • Page 54 SETUP & OPERATION Hydraulic Control Operation valve Oil Flow Con- trol Valve (AH5/AH7) Clamp In/Out Clamp Up/Down Turner Front Toeboard Loader Rear Toeboard FIG. 2-17. 2-15 doc062424 SETUP & OPERATION...
  • Page 55 SETUP & OPERATION Hydraulic Control Operation See Figure 2-18. A/DH5 Hydraulic System 094795 Rear Front Front Rear Clamp Clamp Clamp Clamp Up/Down Up/Down Up/Down Up/Down Rear Front Front Rear Clamp Clamp AC0052 Clamp Clamp In/Out In/Out In/Out In/Out FIG. 2-18. See Figure 2-19.
  • Page 56 SETUP & OPERATION Hydraulic Control Operation CAUTION! Always make sure the engine is running before operating the hydraulic controls. Check the state of battery charge measuring the voltage every 16 hours of operation or once a week. The voltage should not be lower than 12.5V when the engine is not running and not lower than 13.8V when the engine is running (during both measurements the hydraulic system and all accessories must not work).

  • Page 57: Loading, Turning, And Clamping Logs

    SETUP & OPERATION Loading, Turning, And Clamping Logs Loading, Turning, And Clamping Logs CAUTION! Be sure the pivot rails, turning arm, clamp, and toe boards are below bed level before loading a log onto the bed. Failure to do so may result in machine damage or cause misalignment.

  • Page 58: Up/Down Operation

    SETUP & OPERATION Up/Down Operation 6. Disengage the clamp. 7. The log can be turned now. Repeat steps 4 through 7 until the log is turned as desired. To Turn Logs (Optional Procedure For Hydraulic Mills Only) If you are turning a small cant on a Super Series mill, you may opt to use the clamp to turn the cant. 1.
  • Page 59 SETUP & OPERATION Up/Down Operation in position until the cutting head reaches the desired height, then release. DOWN 20_029B FIG. 2-20. The up/down switch is designed to return to the neutral position when released. If the switch remains engaged, manually move it to the neutral position. Repair the switch. CAUTION! DO NOT try to force the carriage above the 35”...

  • Page 60: Blade Guide Arm Operation

    SETUP & OPERATION Blade Guide Arm Operation 2.11 Blade Guide Arm Operation 1. Look down the length of the log to see its maximum width. The outer blade guide should be adjusted to clear the widest section of the log by less than about 25 mm. 2.

  • Page 61: Power Feed Operation

    SETUP & OPERATION Power Feed Operation 2.12 Power Feed Operation See Figure 2-22. The power feed system moves the carriage forward and backward by using two switches on the control panel. Carriage Forward Feed Rate Adjustment Carriage Reverse 20_121B FIG. 2-22. Carriage Feed Rate The carriage feed rate switch controls the speed at which the carriage travels forward.
  • Page 62 SETUP & OPERATION Power Feed Operation The middle position (shown in the figure above) is the neutral position. The power feed switch is designed to return to the neutral position when released. If the switch remains engaged, manually move it to the neutral position. Repair the switch. (See Section 4.2.) WARNING!

  • Page 63: Cutting The Log

    Cutting The Log 2.13 Cutting The Log The following steps guide you through normal operation of the Wood-Mizer sawmill. 1. Once the log is placed where you want it and clamped firmly, position the blade close to the end of the log.

  • Page 64: Edging

    Edging 2.14 Edging The following steps guide you through edging boards on the Wood-Mizer sawmill. 1. Raise the side supports to ˝ the height of the flitches, or the boards that need to be edged. 2. Stack the flitches on edge against the side supports.
  • Page 65 SETUP & OPERATION Blade Height Scale Blade Height Indicator The blade height indicator has two horizontal, red lines on both sides. Readings should be taken with eyes level with the indicator, when the two red lines are in line. This will allow to avoid the parallax error (different scale readings depending on the angle of vision).

  • Page 66: Water Lube Operation

    SETUP & OPERATION Water Lube Operation Line up the horizontal red line on the indicator with the nearest mark on the scale you want to use. Make a trim cut. When you return the carriage for a second cut, lower the carriage to the next mark on the scale.

  • Page 67: Preparing The Sawmill For Towing

    Blow any remaining water from the water lube hose. 2.17 Preparing The Sawmill For Towing The Wood-Mizer trailer package makes transporting your sawmill easy and convenient. To get your sawmill ready for towing, follow these instructions.
  • Page 68 SETUP & OPERATION Preparing The Sawmill For Towing 6. Continue lowering the head 3/4” (19 mm) until it contacts the stop bolt located on the mast. CAUTION! It is important that the stop bolt is properly adjusted to secure the carriage on the track rail. Failure to properly adjust the stop bolt can cause cutting head damage, especially during mill transportation.

  • Page 69: Section 3 Maintenance

    MAINTENANCE Wear Life SECTION 3 MAINTENANCE This section lists the maintenance procedures that need to be performed. WARNING! Disconnect and lock out power supply before servicing, cleaning and doing maintenance to the saw! Failure to do so may result in serious injury. The Short Interval Maintenance Schedule lists procedures that need to be performed every 4, 8 or 24 hours.

  • Page 70: Sawdust Removal

    MAINTENANCE Sawdust Removal will lead to early blade breakage. FIG. 3-1 Sawdust Removal 1. Remove the excess sawdust from the blade wheel housing and sawdust chute every blade change. Carriage Track, Wiper & Scrapers See Figure 3-2. 1. Clean the upper and lower track rails to remove any sawdust and sap buildup every eight hours of operation.

  • Page 71: Vertical Mast Rails

    MAINTENANCE Vertical Mast Rails Loosen thumbscrews to open housing lid Remove sawdust Carriage track Remove track wiper, clean and lubricate Adjust track scrapers FIG. 3-2 Vertical Mast Rails Lubricate the vertical mast rails with WD40, clean and wipe them dry every 50 hours of operation.

  • Page 72: Miscellaneous

    MAINTENANCE Miscellaneous Miscellaneous 1. Apply a thin film of a lithium grease to the blade guide arm to help prevent it from rusting. 2. Lubricate the log turner (if equipped) with a lithium grease every fifty hours of operation. Lubricate the turner pivot points (e.g.

  • Page 73: Blade Wheel Belts

    MAINTENANCE Blade Wheel Belts See Figure 3-3. Tensioner Handle Screw 20_006_B 090586 FIG. 3-3 Blade Wheel Belts 1. Check the blade wheel belts for wear every 50 hours of operation. Replace as needed. Periodically check all belts for wear. Replace any damaged or worn belts as needed. Brake Pads Adjustment ( Gas / Diesel Sawmills Only ) Check the brake pads for wear every 200 hours of operation.

  • Page 74: Drive Belt Adjustment

    MAINTENANCE Drive Belt Adjustment brake is applied. If they are not, it can lead to their premature wear. Locking Bolts FIG. 3-3 3.10 Drive Belt Adjustment WARNING! Do not for any reason adjust the drive belts with the motor running. Doing so may result in serious injury. See Table 3-2.
  • Page 75 MAINTENANCE Drive Belt Adjustment 3,6KG 11mm FIG. 3-4 To adjust the drive belt tension: 1. Raise the blade housing cover. AC Sawmills 2. Loosen the four mounting bolts in the motor mount plate (See the figure below). 3. Loosen mounting bolts and using the adjustment nuts adjust the drive belt(s) tension according to the specifications given in Table 3-2.
  • Page 76 MAINTENANCE Drive Belt Adjustment 4. Tighten the four mounting bolts. 20_033a Adjustment Nuts Mounting Bolts FIG. 3-5 DC Sawmills To tighten - turn the bolt clockwise; to loosen - turn it counterclockwise. Periodically check the belts for wear. Replace if the belt is damaged or worn. doc062424 MAINTENANCE...

  • Page 77: Hydraulic System

    MAINTENANCE Hydraulic System 3.11 Hydraulic System 1. Check the hydraulic fluid level every 50 hours of operation. Add fluid as necessary. The level in the hydraulic pump should be 3/4" (19mm) from the top with all cylinders collapsed. If humidity is a problem or the mill is used outside in humid weather, drain and replace two quarts (.95 liters) of fluid every six months.

  • Page 78: Up/Down System

    WARNING! If you noticed the up/down chain or chain brackets wear, immediately stop the work and contact Wood-Mizer Customer Service. Failure to do so will result in serious injury or death. 3. Adjust the up/down gear belt tension as needed.
  • Page 79 MAINTENANCE Up/Down System 4. Loosen the four set screws shown below. Adjust the belt tension and tighten the set screws. Set Screws FIG. 3-8 MAINTENANCE doc062424 3-11...

  • Page 80: Power Feed System

    MAINTENANCE Power Feed System 3.13 Power Feed System 1. Adjust the power feed chain as needed. WARNING! Always remove the key from the key switch before adjusting the chain. Failure to do so may result in serious injury. See Figure 3-9. Loosen the locking nut. To tighten the chain, turn the adjusting bolt clockwise. To loosen the chain, turn the adjusting bolt counterclockwise.
  • Page 81 MAINTENANCE Power Feed System See Figure 3-10. Keep the pulleys aligned to avoid premature V-belt and pulleys wear. FIG. 3-10 To align the pulleys, slide one of them on the shaft appropriately. 3. Adjust the power feed gear belt tension as needed. WARNING! Remove the key from the key switch before adjusting the belt tension.
  • Page 82 MAINTENANCE Power Feed System See Figure 3-11. Loosen the adjustment bolts shown below. Adjust the belt tension and tighten the adjustment bolts. Adjustment Bolts 20_036B FIG. 3-11 4. If the power feed chain must be replaced, route a new chain as shown on the picture below. FIG.

  • Page 83: Safety Devices Inspection

    MAINTENANCE Safety Devices Inspection 3.14 Safety Devices Inspection LT20 DC – Safety devices inspection Safety devices on the LT20DC machine which must be checked before every shift: E-STOP button and its circuit inspection  Inspection of the control circuits with the E-STOP button pressed ...
  • Page 84 MAINTENANCE Safety Devices Inspection Saw Head Saw Head Forward Debarker Motor On/Off Saw Head Down Saw Head Reverse Debarker Arm In/Out Emergency Stop Button Blade Guide Arm In/Out 20_121d Engine Key Switch 2. Inspection of the control circuits with the E-STOP button pressed Start the engine;...
  • Page 85 MAINTENANCE Safety Devices Inspection Turn the tensioner handle to engage the blade;  Open blade housing cover;  Enginer should be stopped;  Try to start the engine. The engine should remain stopped;  Close blade housing cover;  Engine should remain stopped. ...

  • Page 86: Filling Blade Tensioner Cylinder With Oil

    MAINTENANCE Filling Blade Tensioner Cylinder with Oil 3.15 Filling Blade Tensioner Cylinder with Oil 1. Loosen the blade tensioner completely. 2. Unscrew the oil pressure gauge. 3. Using an oiler equipped with a tube / hose, top up the oil level until the oil flows out of the cylinder. IMPORTANT! The cylinder needs to be filled with MOBIL DTE 10 Excel 32 Hydraulic Oil (#WM part number: P12825).
  • Page 87 MAINTENANCE Filling Blade Tensioner Cylinder with Oil 5. Seal the oil pressure gauge with Teflon tape and screw it back. MAINTENANCE doc062424 3-19...
  • Page 88 WOOD-MIZER LT20 SERIES SAWMILL SHORT INTERVAL MAINTENANCE SCHEDULE Check motor/engine and option manuals for additional maintenance procedures) PROCEDURE MANUAL REFERENCE EVERY BLADE CHANGE SEE SECTION 3.3 Check Blade Guide Rollers. SEE SECTION 3.3 Remove Sawdust From Blade Wheel Housings And Sawdust Chute.
  • Page 89 30doc062424 1-21...
  • Page 90 WOOD-MIZER LT20 SERIES MAINTENANCE LOG (Check motor/engine and option manuals for additional maintenance procedures) TOTAL HOURS OF OPERATION PROCEDURE MANUAL REFERENCE FILL IN THE DATE AND THE MACHINE HOURS AS YOU PERFORM EACH PROCEDURE. A SHADED BOX INDICATES MAINTENANCE IS NOT NEEDED AT THIS TIME.
  • Page 91 WOOD-MIZER LT20 SERIES MAINTENANCE LOG (Check motor/engine and option manuals for additional maintenance procedures) TOTAL HOURS OF OPERATION PROCEDURE MANUAL REFERENCE FILL IN THE DATE AND THE MACHINE HOURS AS YOU PERFORM EACH PROCEDURE. A SHADED BOX INDICATES MAINTENANCE IS NOT NEEDED AT THIS TIME.
  • Page 92 WOOD-MIZER LT20 SERIES MAINTENANCE LOG (Check motor/engine and option manuals for additional maintenance procedures) TOTAL HOURS OF OPERATION PROCEDURE MANUAL REFERENCE FILL IN THE DATE AND THE MACHINE HOURS AS YOU PERFORM EACH PROCEDURE. A SHADED BOX INDICATES MAINTENANCE IS NOT NEEDED AT THIS TIME.
  • Page 93 WOOD-MIZER LT20 SERIES MAINTENANCE LOG (Check motor/engine and option manuals for additional maintenance procedures) TOTAL HOURS OF OPERATION PROCEDURE MANUAL REFERENCE FILL IN THE DATE AND THE MACHINE HOURS AS YOU PERFORM EACH PROCEDURE. A SHADED BOX INDICATES MAINTENANCE IS NOT NEEDED AT THIS TIME.
  • Page 94 WOOD-MIZER LT20 SERIES MAINTENANCE LOG (Check motor/engine and option manuals for additional maintenance procedures) TOTAL HOURS OF OPERATION PROCEDURE MANUAL REFERENCE FILL IN THE DATE AND THE MACHINE HOURS AS YOU PERFORM EACH PROCEDURE. A SHADED BOX INDICATES MAINTENANCE IS NOT NEEDED AT THIS TIME.
  • Page 95 WOOD-MIZER LT20 SERIES MAINTENANCE LOG (Check motor/engine and option manuals for additional maintenance procedures) TOTAL HOURS OF OPERATION PROCEDURE MANUAL REFERENCE FILL IN THE DATE AND THE MACHINE HOURS AS YOU PERFORM EACH PROCEDURE. A SHADED BOX INDICATES MAINTENANCE IS NOT NEEDED AT THIS TIME.

  • Page 96: Section 4 Troubleshooting Guide

    Troubleshooting Guide Sawing Problems SECTION 4 TROUBLESHOOTING GUIDE Sawing Problems PROBLEM CAUSE SOLUTION Blades Dull Quickly Dirty logs Clean or debark logs, especially on entry side of the cut When grinding teeth, heating too Grind just enough metal to restore much and causing teeth to soften sharpness to the teeth.
  • Page 97 Troubleshooting Guide Sawing Problems PROBLEM CAUSE SOLUTION Boards Thick Or Thin On Stress in log which causes log to not After log has been squared, take equal Ends Or Middle Of Board. lay flat on the bed. cuts off opposing sides. Take a board off the top.

  • Page 98: Electrical Problems

    When Switch Is Released. position. Replace drum switch or remove control panel cover and clean and lubricate contacts NOTE: Use only contact grease supplied by Wood-Mizer. Drum switch spring broken. Manually move the power feed or up/down switch back to neutral or "off"...

  • Page 99: Power Feed Problems

    Power Feed Is Jerky At Low Drum switch is dirty. Clean drum switch and lubricate with contact Speeds Or Does Not Move grease supplied by Wood-Mizer. Until Speed Is Above Halfway Mark. Drum switch contacts are bad Check that contacts are in good condition and positively close circuit.
  • Page 100 Troubleshooting Guide Power Feed Problems PROBLEM CAUSE SOLUTION Power Feed Motor Overheats. Middle track oiler is dragging. Clean middle track oiler and lubricate with 30-weight oil or ATF (Automatic Transmission Fluid) such as Dexron II. Allow motor to cool before restarting. Ground is not level.

  • Page 101: Hydraulic Problems

    Troubleshooting Guide Hydraulic Problems Hydraulic Problems PROBLEM CAUSE SOLUTION You Can Actuate Any Carriage not positioned Make sure carriage contact bracket is adjusted Hydraulic Handle, But Get No properly to provide power to far enough forward for battery positive contact Response From The Pump.
  • Page 102 Troubleshooting Guide Hydraulic Problems PROBLEM CAUSE SOLUTION Pump Motor Runs With Little Low fluid level Check fluid level. Add an all-season hydraulic Or No Response From The fluid such as Amoco Rycon Oil MV or Mobil Cylinders Multipurpose ATF (automatic transmission fluid) until level is 4 - 4 1/2"...
  • Page 103 Troubleshooting Guide Hydraulic Problems PROBLEM CAUSE SOLUTION Hydraulic Side Supports Go Dirt in sequence valve Remove sequence valves and clean thoroughly Down Before Or At Same with kerosene. NOTE: Be sure to reassemble Time As Log Turner the valve and install it in its original position on the cylinder Retainer in sequence valve Replace sequence valve...

  • Page 104: Engine/Motor And Drive Pulleys Alignment

    Troubleshooting Guide Engine/Motor and Drive Pulleys Alignment Engine/Motor and Drive Pulleys Alignment 1. Install the drive belt. 2. Use a straight edge to align the engine/motor pulley to the drive pulley. Also check that the engine pulley is within 1/8" square with the drive pulley. Loosen the engine mounting bolts and rotate the engine if necessary.

  • Page 105: Section 5 Sawmill Alignment

    SECTION 5 SAWMILL ALIGNMENT Pre-Alignment Procedures The Wood-Mizer sawmill is factory aligned. This section includes instructions on how to realign the sawmill completely. Be scrupulous when performing all alignment steps, because sawmill alignment determines accuracy of your cuts. The alignment procedure should be performed approximately every 1500 hours of operation (sooner if you regularly transport the sawmill over rough terrain).

  • Page 106: Frame Setup

    SAWMILL ALIGNMENT Frame Setup Frame Setup Stationary sawmills should be setup on firm, level ground before proceeding with alignment. Portable sawmills should also be setup on firm, level ground. : Adjust the two middle outriggers on the main frame tube down just enough to lift weight from the trailer tire.
  • Page 107 SAWMILL ALIGNMENT Blade Installation And Alignment 3. Manually spin one of the blade wheels until the blade positions itself on the blade wheels. Gas Sawmills: 1. Turn the key switch to the "0" position and remove the key. 2. Open the blade housing cover. 3.
  • Page 108 SAWMILL ALIGNMENT Blade Installation And Alignment ride 4.5 mm (0.18") from the front edge of the wheels (± 1.0 mm [0.04"]). Do not let the teeth ride on the belt. SM0044D 3.0 mm (0.12”) ± 1 mm (0.04”) 4.5 mm (0.18”) 1 1/4"...

  • Page 109: Blade Wheel Alignment

    SAWMILL ALIGNMENT Blade Wheel Alignment Blade Wheel Alignment The blade wheels should be adjusted so they are level in the vertical and horizontal planes. If the blade wheels are tilted up or down, the blade will want to travel in the tilted direction. If the blade wheels are tilted horizontally, the blade will not track properly on the wheels.
  • Page 110 SAWMILL ALIGNMENT Blade Wheel Alignment See Figure 5-4. Use the vertical adjustment screws to adjust the drive-side blade wheel. To tilt the wheel, loosen the top adjustment screw one quarter turn. Loosen the jam nut on the bottom adjustment screw and tighten the screw. Tighten the top and bottom jam nuts. To tilt the wheel, loosen the bottom adjustment screw one quarter turn.
  • Page 111 SAWMILL ALIGNMENT Blade Wheel Alignment See Figure 5-5. Use the vertical adjustment screws to adjust the idle-side blade wheel. To tilt the wheel up, loosen the bottom adjustment screw one quarter turn. Loosen the jam nut on the top adjustment screw and tighten the screw. Tighten the top and bottom jam nuts. To tilt the wheel down, loosen the top adjustment screw one quarter turn.
  • Page 112 SAWMILL ALIGNMENT Blade Wheel Alignment 150060 3.0 mm (1/8”) ± 1 mm (3/64”) 1 1/4" 1 1/4" Blade Blade FIG. 5-6 See Figure 5-7. Use the cant control adjustment to adjust the idle-side blade wheel. If the blade is too far forward on the wheel, turn the cant control counterclockwise. If it is too far back on the wheel, turn the cant control clockwise.
  • Page 113 SAWMILL ALIGNMENT Blade Wheel Alignment adjustment screw to move blade in on wheel. Tighten the jam nut. Adjustment Adjustment Screw Screw 20_117 FIG. 5-8 SAWMILL ALIGNMENT doc062424...

  • Page 114: Adjusting The Lower Track Rollers

    SAWMILL ALIGNMENT Adjusting The Lower Track Rollers Adjusting The Lower Track Rollers See Figure 5-9. Making these adjustments correctly will give you square cuts and accurate dimensions across the width of your boards. 1. Using the power feed switch, move the saw carriage so that the blade is positioned over the front pivot bed rail.
  • Page 115 SAWMILL ALIGNMENT Adjusting The Lower Track Rollers See Figure 5-10. 17" (400 mm) 17" (400 mm) to blade to blade SM0137 FIG. 5-10 7. Move the carriage forward to check the distance to the blade at the inside of the pivot rail support. Both measurements should be equal within (±...

  • Page 116: Adjusting Bed Rails To The Blade

    SAWMILL ALIGNMENT Adjusting Bed Rails To The Blade See Figure 5-11. Stop Screw Stop Screw FIG. 5-11 Adjusting Bed Rails To The Blade 1. Adjust the front pivot bed rail 90 to the main bed tube. 2. Move the cutting head to center the blade over the front pivot bed rail. 3.
  • Page 117 SAWMILL ALIGNMENT Adjusting Bed Rails To The Blade See Figure 5-13. Optional bed rail (angled) to blade to blade Inner Height Outer Height Adjustment Nut Adjustment Bolt FIG. 5-13 6. Loosen the jam nut and turn the outer height adjustment bolt to adjust the height of the outer end of the pivot rail.

  • Page 118: Blade Guide Arm Vertical Adjustment

    SAWMILL ALIGNMENT Blade Guide Arm Vertical Adjustment See Figure 5-15. Optional bed rail (angled) Blade Bed rails Clamp bolt Clamp bolt Adjustment Adjustment bolt Adjustment bolt bolt SM0064_D FIG. 5-15 9. Loosen the bed rail clamping bolts and turn the adjustment bolts to move the bed rails to the blade if necessary.

  • Page 119: Blade Guide Arm Feed Chain Adjustment

    SAWMILL ALIGNMENT Blade Guide Arm Feed Chain Adjustment See Figure 5-16. 20_038 Turn outside rollers to Turn outside rollers raise or lower or lower to raise or lower end end of blade guide arm of blade guide arm FIG. 5-16 4.
  • Page 120 SAWMILL ALIGNMENT Blade Guide Arm Feed Chain Adjustment the arm motor placement. Next, tighten the set screws. If the motor sprocket (1) is not parallel to the blade guide arm sprockets (2), the drive assembly may be adjusted by turning it at a small angle around the indicated point.
  • Page 121 SAWMILL ALIGNMENT Blade Guide Arm Feed Chain Adjustment See Figure 5-17. Loosen the two set screws. Move the bracket with motor down to tighten the chain, move it up to loosen. Next tighten the set screws. Set Screws 20_123_D 090586 FIG.

  • Page 122: Saw Head Backlash Removal

    SAWMILL ALIGNMENT Saw Head Backlash Removal Saw Head Backlash Removal Check the saw head for backlash every 200 hours of operation. If necessary, remove the backlash. See Figure 5-18. To check if the backlash is present, grasp the outside part of the saw head and move it as shown in the figure below.
  • Page 123 SAWMILL ALIGNMENT Saw Head Backlash Removal 2. Tighten the two adjustment bolts evenly to remove the backlash. Set screws Set Screws Nuts Nuts Adjustment bolts Adjustment Bolts FIG. 5-18 0.1 mm 0,1 mm Set Screw Set Screw Adjustment Adjustment bolt Bolt FIG.

  • Page 124: Blade Guide Arm Horizontal Adjustment

    SAWMILL ALIGNMENT Blade Guide Arm Horizontal Adjustment 5.10 Blade Guide Arm Horizontal Adjustment 1. Put the blade guide assembly back in the arm (if you took it out). Put the assembly back so that the flanged collar on the roller is about 3.0 mm (0.04") from the back of the blade when the arm is 15 mm (0.6") from full open.

  • Page 125: Aligning The Blade Guides

    5.11 Aligning the Blade Guides Each Wood-Mizer sawmill has two blade guide assemblies that help the blade maintain a straight cut. The two blade guide assemblies are positioned on the cutting head to guide the blade on each side of the material being cut.
  • Page 126 SAWMILL ALIGNMENT Aligning the Blade Guides Blade guide alignment includes four steps: Blade Deflection  Blade Guide Vertical Tilt  Blade Guide Flange Spacing  Blade Guide Horizontal Tilt  Perform the blade guide alignment after you have aligned the blade on the wheels and adjusted the blade and blade guide arm parallel to the bed rails.

  • Page 127: Blade Deflection

    SAWMILL ALIGNMENT Blade Deflection 5.12 Blade Deflection Perform the following steps to achieve proper blade deflection with the blade guides. 1. Raise the carriage until the blade is 375 mm (15") above a bed rail. Measure the actual distance with a tape from the top of the rail to the bottom of the blade.

  • Page 128: Blade Guide Vertical Tilt Adjustment

    SAWMILL ALIGNMENT Blade Guide Vertical Tilt Adjustment 5.13 Blade Guide Vertical Tilt Adjustment Check that the blade guide does not tilt the blade up or down. A Blade Guide Alignment Tool (BGAT) is provided to help you measure the vertical tilt of the blade. 1.
  • Page 129 SAWMILL ALIGNMENT Blade Guide Vertical Tilt Adjustment See Figure 5-23. Loosen jam nuts and turn screws to Loosen jam nuts and turn screws tilt roller up or down to tilt roller up or down SM0070 FIG. 5-23 8. Move the carriage forward so the back end of the tool is over the bed rail. 9.

  • Page 130: Blade Guide Spacing

    SAWMILL ALIGNMENT Blade Guide Spacing 5.14 Blade Guide Spacing HINT: When adjusting blade guide spacing, loosen the top set screw and one side set screw only. This will ensure horizontal and vertical tilt adjustments are maintained when the set screws are retightened.

  • Page 131: Horizontal Tilt Adjustment

    SAWMILL ALIGNMENT Horizontal Tilt Adjustment 5.15 Horizontal Tilt Adjustment 1. Finally, both blade guides must be tilted horizontally. Adjust the blade guide arm halfway in. See Figure 5-25. Turn side set screws to adjust horizontal tilt FIG. 5-25 2. Place the Blade Guide Alignment Tool against the face of the outer blade guide roller. 3.

  • Page 132: Vertical Adjustment Of Side Supports

    SAWMILL ALIGNMENT Vertical Adjustment of Side Supports See Figure 5-26. 3. Use the two lower bolts to adjust the side support so B=A. 4. Repeat for remaining side supports. Bed rail Measure distance Side support Adjustment bolts FIG. 5-26 5.17 Vertical Adjustment of Side Supports 1.
  • Page 133 SAWMILL ALIGNMENT Vertical Adjustment of Side Supports See Figure 5-27. FIG. 5-27 4. Check the angle of each support with a square on the board. 5. The side support should be 90 to the bed rails or leaning forward 1.0 mm (0.04"). Loosen the top adjustment bolt, adjust the side support, and retighten the bolt.

  • Page 134: Saw Head Tilt

    SAWMILL ALIGNMENT Saw Head Tilt 5.18 Saw Head Tilt As the blade enters a wide log or cant, the outside of the saw head will drop down slightly. To compensate for the drop, use the lower track roller horizontal nuts to raise the outside of the saw head 1.5 mm (0.06").
  • Page 135 SAWMILL ALIGNMENT Saw Head Tilt See Figure 5-29. Blade Blade 375 mm + 1 mm 375 mm Bed rail Bed Rail Sm0064-1 FIG. 5-29 SAWMILL ALIGNMENT doc062424 5-31...

  • Page 136: Blade Height Scale Adjustment

    SAWMILL ALIGNMENT Blade Height Scale Adjustment 5.19 Blade Height Scale Adjustment After the entire sawmill has been aligned and all adjustments made, check that the blade height scale indicates the true distance from the blade to the bed rails. 1. Move the saw head so the blade is positioned directly above one of the bed rails. Measure from the bottom edge on a down-set tooth of the blade to the top of the bed rail (or stainless steel sleeve if applicable).

  • Page 137: Ec Declaration Of Conformity

    EC declaration of conformity according to EC Machinery Directive 2006/42/EC, Annex II, 1.A Manufacturer: Wood-Mizer Industries sp. z o.o. Nagórna 114, 62- Tel. +48 63 26 26 000 This declaration of conformity is issued under the sole responsibility of the manufacturer.

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