Wood-mizer LT20 AH Series Safety, Setup, Operation & Maintenance Manual
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Wood-mizer LT20 AH Series Safety, Setup, Operation & Maintenance Manual

Wood-mizer LT20 AH Series Safety, Setup, Operation & Maintenance Manual

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Summary of Contents for Wood-mizer LT20 AH Series

  • Page 1 Table of Contents Section-Page Table of Contents SW-07doc1115171...
  • Page 3 Wood-Mizer ® Sawmill Safety, Setup, Operation & Maintenance Manual LT20 Series AH rev. E2.05 Safety is our #1 concern! Read and understand all safety information and instructions before oper- ating, setting up or maintaining this machine. Form #619 This is the original language...

  • Page 4: Table Of Contents

    Table of Contents Section-Page General Contact Information Branches & Authorized Sales CentersWood-Mizer Locations (North and South America) 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 Observe Safety Instructions Wear Safety Clothing Keep sawmill And Area Around sawmill Clean Dispose Of Sawing By-Products Properly Check sawmill Before Operation...
  • Page 5 Table of Contents Section-Page DANGER! Hazardous voltage inside the electric box (even if disconnected with the main disconnect switch) and at the motor can cause shock, burns, or death. Always disconnect power supply before servicing!Hydraulic Control Operation ....2-19 2.10 Loading, Turning, And Clamping Logs ..........2-22 2.11 Up/Down Operation ................2-24 2.12...
  • Page 6 Table of Contents Section-Page Blade Guide Arm Vertical Adjustment ..........3-14 Blade Guide Arm Feed Chain Adjustment...........3-15 Saw Head Backlash Removal...............3-18 5.10 Blade Guide Arm Horizontal Adjustment..........3-20 5.11 Aligning the Blade Guides ..............3-21 5.12 Blade Deflection...................3-23 5.13 Blade Guide Vertical Tilt Adjustment..........3-24 5.14 Blade Guide Spacing ................3-26 5.15...

  • Page 7: 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 8: 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 Tel.: +1-317-271-1542...
  • Page 9 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 86012 Cercemaggiore 23 300 Kikinda Krešimir Pregernik Campobasso Tel.:/Fax: +381-230-25-754...
  • Page 10 Brazil Headquarters Europe Headquarters Serving Brazil Serving Europe, Africa, West Asia Wood-Mizer do Brasil Wood-Mizer Industries Sp z o.o. Rua Dom Pedro 1, No: 205 Bairro: Sao Jose Nagorna 114 Ivoti/RS CEP:93.900-000 62-600 Kolo, Poland Tel: +55 51 9894-6461/ +55 21 8030-3338/ +55 51 Phone: +48.63.26.26.000...

  • Page 11: 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 applicable laws and comply with them fully while using or towing the mill.

  • Page 12: 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 13 Safety & General Information Sawmill Operation 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 14: 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 15: 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 16: Wear Safety Clothing

    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 17: Keep Persons Away

    Safety & General Information Keep Persons Away DANGER! Make sure all guards and covers are in place and secured before operating the sawmill. Failure to do so may result in serious injury. 1.5.1 Keep Persons Away DANGER! Keep all persons out of the path of moving equipment and lumber when operating the sawmill.

  • Page 18: Use Proper Maintenance Procedures

    Safety & General Information Use Proper Maintenance Procedures WARNING! Use extreme caution when spinning the blade wheels by hand. Make sure hands are clear of blade and wheel spokes before spinning. Failure to do so may result in serious injury. 1.5.1 Use Proper Maintenance Procedures DANGER!

  • Page 19: Keep Safety Labels In Good Condition

    Safety & General Information Keep Safety Labels In Good Condition the blades. CAUTION! Always wear gloves when handling the blade. Never grab the blade with bare hands! CAUTION! If the blade breaks during sawmill operation, push the EMERGENCY STOP button to stop the blade motor and wait 10 seconds before you open the blade housing cover.
  • Page 20 Safety & General Information Keep Safety Labels In Good Condition See Table 1-1. Pictogram decals used to warn and inform the user about danger in the LT20. TABLE 1-1 Decal View W-M No. Description 096317 CAUTION! Read thoroughly the manual before operating the machine.
  • Page 21 Safety & General Information Keep Safety Labels In Good Condition TABLE 1-1 099221 CAUTION! Keep all persons a safe distance away from work area when operating the machine. 099221 098176 CAUTION! Keep away from debarker blade! 098176 096316 CAUTION! Do not open or close the electric box when the switch is not in the “0”...
  • Page 22 Safety & General Information Keep Safety Labels In Good Condition TABLE 1-1 099222 CAUTION! Sawdust outlet. Protect eyes! 099542 CAUTION! Trailer 099542 086099 CAUTION! Hot elements, keep your distance! 086099 096321 Blade movement direction 512234 Clean the chain of sawdust every 50 hours of operation or once a week 512234 1-12...
  • Page 23 Safety & General Information Keep Safety Labels In Good Condition TABLE 1-1 512156 Lubricate the chain every 50 hours of operation or once a week. 512156 S12004G CAUTION! Always wear safety goggles when operating the sawmill! S12005G CAUTION! Always wear protective ear muffs when operating the sawmill! 501465 Caution! Wear foot protection when...
  • Page 24 Safety & General Information Keep Safety Labels In Good Condition TABLE 1-1 P11789 Aligning the blade on the wheels 510643 Setting the blade tension indicator 510643 1015-1088 70-75 1088-1160 75-80 80-85 1160-1233 P85070 CE safety certification 099401 Russian safety certification 099401 S20097F 2925 RPM - Motor rotation direction...

  • Page 25: Belt Sizes

    Browning belts only. Blade Sizes See Table 1-3. Wood-Mizer TRU•SHARP™ offers three types of blades to provide efficient sawing for all models of sawmills. The engine/motor size of your sawmill and the type of wood you saw should determine which blade you choose for optimum performance.

  • Page 26: Log Dimensions

    Safety & General Information Log Dimensions Log Dimensions See Table 1-4. The log size capacities of the LT20 series sawmill are listed below. Max. Max. Diameter Length 4.8 m (15' 7") LT20 S 71 cm LT20 M 71 cm 6.1 m (20') LT20 L 71 cm 8,4m...

  • Page 27: Noise Level

    Safety & General Information Noise Level See Table 1-7. See the table below for power supply specifications for the LT20 sawmill. 3-Phase Fused Recommended Volts Disconnect Wire Size Switch Non-Hydraulic 400 VAC 25 Amp 4 mm up to 15 m of length Hydraulic 400 VAC 35 Amp...

  • Page 28: Chains

    Safety & General Information Chains See Table 1-9. The overall dimensions of the LT20 series sawmill are listed below. Model Width Weight Weight Length Width Height Operating Position w/Trailer (Loading Arms Raised) LT20S 6.7 m 3.5 m 2,5 m 923 kg 1068 kg w/Trailer LT20M...

  • Page 29: Dust Extractor Specifications

    Safety & General Information Dust Extractor Specifications 1.14 Dust Extractor Specifications See Table 1-2. 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 30: Comhydraulic System

    See Table 1-1. The specifications of the hydraulic system are shown below. Hydraulic Pump HYDROIRMA Pressure Rating 15MPa TABLE 1-1 1.16 ponents See Figure 1-3. The major components of the Wood-Mizer LT20 Series are shown below. Motor Saw Head Control Panel Blade Tensioner FIG. 1-1...

  • Page 31: Lt20 Series A/Dh Hydraulic Components

    Safety & General Information LT20 Series A/DH Hydraulic Components 1.17 LT20 Series A/DH Hydraulic Components Mfg. Part No. Wood-Mizer Description Part # CJ-S96-16-70/32/178 088589 Hyd Cylinder 70mm Bore x 178mm Stroke CJ-S169-16-40/22/254 088590 Hyd Cylinder 40mm Bore x 254mm Stroke...
  • Page 32 Safety & General Information LT20 Series A/DH Hydraulic Hoses 0.25m 3/8” HYDRAULIC PUMP TO VALVE 087774 (10") Orange 0.69m 3/8” LOG TURNER CYLINDER TOP 087775 (27") Yellow 3.27m 1/4” FRONT TOE BOARD TOP (LT40S) 087790 (129") 3.83m 1/4” FRONT TOE BOARD TOP (LT40M) 087776 (151") Gray...

  • Page 33: Electrical Information

    Safety & General Information Electrical Information Yellow 4.57m 1/4” CLAMP DOWN (LT40S) 087796 (180") 5.1m 1/4” CLAMP DOWN (LT40M) 087789 (202") WHITE 157" 1/4" FRONT CLAMP IN/OUT CYLINDER BASE (A/DH5) 094778 ORANGE 157" 1/4" FRONT CLAMP IN/OUT CYLINDER TOP (A/DH5) 094778 150"...
  • Page 34 Safety & General Information Electrical Information See Figure 1-4. The Hydraulic Pump Electrical Diagram is shown below. 093088 FIG. 1-2 Description (See Figure above): G1 - Socket 16A Q - Main Switch 1M - Pump Switch Contactor F1M - Thermal Pump Motor Relay M - Pump Motor L1 - Control Lamp (White - Power Turned On) F1 - Lamp Circuit Breaker...

  • Page 35: 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 36: Stationary Sawmill Setup

    SETUP & OPERATION Stationary Sawmill Setup IMPORTANT! When starting the machine for the first time, check that main motor rotation direction is as indicated by the arrow located on the motor body (fan guard). If the rotation direction is incorrect, invert the phases in the phase inverter in the power socket (electric box).
  • Page 37 SETUP & OPERATION Stationary Sawmill Setup Set up the mill on firm footing and level by eye. Fasten the mill to the floor to prevent any creep after prolonged use. A cement pad with 5/8” (16 mm) diameter anchor bolts is recommended. The cement pad should be rated to support 6350 lbs./sq.ft.
  • Page 38 SETUP & OPERATION Stationary Sawmill Setup See Figure 2-2. Sawmill Mast Tilt 20_025_B 097237 FIG. 2-2 doc111517 SETUP & OPERATION...
  • Page 39 SETUP & OPERATION Stationary Sawmill Setup 3830 2040 2790 LT20 S Stationary Metric Dimensions* LT20 S Stationary Metric Dimensions* 1623 2964 1762 20_108C 2377 3055 LT20 M Stationary Metric Dimensions* LT20 M Stationary Metric Dimensions* *All dimensions in millimetres *All dimensions in millimetres FIG.

  • Page 40: Sawmills With Cable Guide

    SETUP & OPERATION Sawmills with cable guide See Figure 2-3. Pivot End Rail Pivot End Rail Side Support Side Support Bed Rail Bed Rail Stop Block Stop Block SM0130 FIG. 2-3. 2.2.1 Sawmills with cable guide See Figure 2-4. The figure below shows setup of the sawmill, the control box and the guiding rail col- umns.
  • Page 41 SETUP & OPERATION Sawmills with cable guide FIG. 2-4. LT40MRC SETUP & OPERATION doc111517...
  • Page 42 SETUP & OPERATION Sawmills with cable guide See Figure 2-5. The electrical wires should be installed on the guiding rail as shown below. FIG. 2-5. See Figure 2-6. Install the rail bracket arm as shown below. M8x30 Bolt FIG. 2-6. doc111517 SETUP &...
  • Page 43 SETUP & OPERATION Sawmills with cable guide See Figure 2-7. Install the guiding rail. FIG. 2-7. SETUP & OPERATION doc111517...
  • Page 44 SETUP & OPERATION Sawmills with cable guide See Figure 2-8. FIG. 2-8. 2-10 doc111517 SETUP & OPERATION...

  • Page 45: Portable Sawmill Setup

    SETUP & OPERATION Portable Sawmill Setup See Figure 2-9. The figure below shows how the cable hanger should be set. FIG. 2-4 Unbolt the four bolts, rotate the hanger 90 degrees to the right and tighten the bolts. Portable Sawmill Setup WARNING! If it is necessary to set up the sawmill on ground with more than 3...
  • Page 46 SETUP & OPERATION Portable Sawmill Setup See Figure 2-10. Adjustment Bolt Locking Pin Travel Lock Pin Outrigger Leg FIG. 2-10. OUTRIGGER ADJUSTMENT 2-12 doc111517 SETUP & OPERATION...
  • Page 47 SETUP & OPERATION Portable Sawmill Setup 3. 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: Middle Track Cover

    SETUP & OPERATION Middle Track Cover Raise the two side supports to prevent the log from falling off the side of the mill when loaded. See Figure 2-12. Pivot End Rail Pivot End Rail Side Support Side Support Bed Rail Bed Rail Stop Block Stop Block...

  • Page 49: Replacing The Blade

    SETUP & OPERATION Replacing The Blade See Figure 2-13. Install the track cover and secure with two thumb screws FIG. 2-13 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 50: 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 51: Tracking The Blade

    SETUP & OPERATION Tracking The Blade 2735 1.07 1160-1233 80-85 TABLE 2-15 Tracking The Blade 1. Open the blade housing cover. 2. Turn the key switch to the ”H” position. 3. Manually spin one of the blade wheels until the blade positions itself on the blade wheels. 4.

  • Page 52: Starting The Motor

    SETUP & OPERATION Starting The Motor DANGER! After aligning the blade on the wheels, always check the blade guide spacing and location. (See Section 5 for more information.) Starting The Motor See the appropriate manual supplied with your specific motor configuration for starting and operating instructions.

  • Page 53: Danger! Hazardous Voltage Inside The Electric Box

    SETUP & OPERATION DANGER! Hazardous voltage inside the electric box (even if disconnected with the main disconnect supply by removing the plug from the socket. CAUTION! The door of the electric box on the hydraulic control box may be opened only when the main switch is in the "0" position. Do not attempt to open the door when the switch is turned to the "1"...
  • Page 54 SETUP & OPERATION DANGER! Hazardous voltage inside the electric box (even if disconnected with the main disconnect See Figure 2-17. A/DH3 Hydraulic units have six control levers to load, clamp, turn and level logs. A/DH5 and A/DH7 hydraulic units have four additional levers for controlling the Pull-Down clamps. In sawmills equipped with A/DH5 hydraulic system, individual Pull-Down clamps are controlled with separate levers.
  • Page 55 SETUP & OPERATION DANGER! Hazardous voltage inside the electric box (even if disconnected with the main disconnect 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...

  • Page 56: Loading, Turning, And Clamping Logs

    SETUP & OPERATION Loading, Turning, And Clamping Logs CAUTION! Always make sure the engine is running before operating the hydraulic controls. 1. Move the clamp out and down so it will not get in the way of logs being loaded onto the bed. Lower the clamp in/out lever to move the clamp out toward the loading side of the sawmill.
  • Page 57 SETUP & OPERATION Loading, Turning, And Clamping Logs To Load Logs 1. Move a log up to the loading arm. Use cant hooks or loading equipment to move the logs to the foot of the loading arms. 2. Roll the log onto the loader so that it is approximately centered with the sawmill bed. The log turner will operate much easier if the log is centered on the sawmill bed.

  • Page 58: Up/Down Operation

    SETUP & OPERATION Up/Down Operation 1. Lower the clamp up/down lever to lower the clamp below bed level. 2. Raise the clamp in/out lever to move the clamp in, beneath the edge of the cant. 3. Raise the clamp up/down lever to raise the clamp and flip the cant. To Clamp Logs 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 2.12 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 SETUP & OPERATION Power Feed Operation 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. Turn the switch clockwise to increase speed. Turn it counterclockwise to reduce speed. Carriage Forward and Reverse The power feed switch controls the direction in which the carriage travels.

  • Page 62: Cutting The Log

    Failure to do so will result in serious injury. 2.14 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 63: Edging

    1 1/16 - 1 1/8” (27-28.6 mm) for each board. 2.15 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.

  • Page 64: Blade Height Scale

    SETUP & OPERATION Blade Height Scale 3. Clamp the flitches against the side supports. (Wider flitches should be placed to the clamp side. When they are edged, flip them over to edge the second side without disturbing the other flitches or without having to pull them from the middle of the stack.) 4.
  • Page 65 SETUP & OPERATION Blade Height Scale Example: You want to cut 1” (25 mm) random width boards from a log. Position the blade for the first cut. Move the carriage to an even measurement on the inch scale. Make a trim cut. Return the carriage for the second cut and lower it 1 1/8”...

  • Page 66: Water Lube Operation

    Blow any remaining water from the water lube hose. 2.18 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 67 SETUP & OPERATION Preparing The Sawmill For Towing 1. Move the cutting head to the front end of the sawmill. Raise the rear outriggers. 2. Move the cutting head to the travel position over the rear bed rail. 3. Put the distance block on the stop bolt. See Figure 2-26.
  • Page 68 SETUP & OPERATION Preparing The Sawmill For Towing See Figure 2-27. Safety Safety Chain Chain FIG. 2-27 CAUTION! Check to be sure that the carriage safety chain is secured before towing the sawmill. Failure to properly secure the cutting head can result in severe machine damage.

  • Page 69: 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. See Figure 3-4.
  • Page 74 MAINTENANCE Drive Belt Adjustment E15, G18, G25, 7/16” (11mm) deflection with 16 lbs. (7,2 KG) of deflection force D17, D22 (two belts) TABLE 3-2 3,6KG 11mm FIG. 3-5 To adjust the drive belt tension: 1. Raise the blade housing cover. AC Sawmills 2.
  • Page 75 MAINTENANCE Drive Belt Adjustment 4. Tighten the four mounting bolts. 20_033a Adjustment Nuts Mounting Bolts FIG. 3-6 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. MAINTENANCE doc111517...

  • Page 76: Hydraulic System

    MAINTENANCE Hydraulic System 3.10 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 77: 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 78 MAINTENANCE Up/Down System 4. Loosen the four set screws shown below. Adjust the belt tension and tighten the set screws. Set Screws FIG. 3-9 3-10 doc111517 MAINTENANCE...

  • Page 79: Power Feed System

    MAINTENANCE Power Feed System 3.12 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 3-10. Loosen the locking nut. To tighten the chain, turn the adjusting bolt clockwise. To loosen the chain, turn the adjusting bolt counterclockwise.
  • Page 80 MAINTENANCE Power Feed System See Figure 3-11. Keep the pulleys aligned to avoid premature V-belt and pulleys wear. FIG. 3-11 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 81 MAINTENANCE Power Feed System See Figure 3-12. Loosen the adjustment bolts shown below. Adjust the belt tension and tighten the adjustment bolts. Adjustment Bolts 20_036B FIG. 3-12 4. If the power feed chain must be replaced, route a new chain as shown on the picture below. FIG.

  • Page 82: Safety Devices Inspection

    MAINTENANCE Safety Devices Inspection 3.13 Safety Devices Inspection LT20 AC – Safety devices inspection Safety devices on the LT20AC 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 83 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_121c Blade Motor Blade Motor START/STOP Key Switch Button 2. Inspection of the control circuits with the E-STOP button pressed Turn on the blade motor;...
  • Page 84 MAINTENANCE Safety Devices Inspection Blade motor should be stopped;  Try to start the motor. The blade motor should remain stopped;  Close blade housing cover;  Blade motor should remain stopped until re-started using START button.  4. Motor brake and its circuit inspection Turn on the blade motor.
  • Page 85 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 86 1-18 30doc111517...
  • Page 87 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 88 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 89 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 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: 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 94 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 95: 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 96: 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 97 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 98: 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 99 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 100 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 101: 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 102: 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 103: 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 104 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 105 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 106: 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 107 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 108 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 109 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 110 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 doc111517 SAWMILL ALIGNMENT...

  • Page 111: 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 112 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 113: 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 114 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 115: 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 116: 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 117 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 118 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 119: 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 120 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 121: 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 122: 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 123 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 124: 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 125: 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 126 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 127: 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 128: 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 129: Horizontal Adjustment Of Side Supports

    SAWMILL ALIGNMENT Horizontal Adjustment of Side Supports 5.16 Horizontal Adjustment of Side Supports Logs and boards are clamped against the side supports when sawing. The sides supports must be square to the bed to ensure square lumber. 1. Swing the side support down. 2.

  • Page 130: Vertical Adjustment Of Side Supports

    SAWMILL ALIGNMENT Vertical Adjustment of Side Supports 5.17 Vertical Adjustment of Side Supports 1. Place a flat board across the bed rails. 2. Swing a side support up so that it is vertical. 3. Pull back at the top of the support to eliminate slack as if a log were being clamped against it. See Figure 5-27.

  • Page 131: 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 132 SAWMILL ALIGNMENT Saw Head Tilt See Figure 5-29. Blade Blade 375 mm + 1 mm 375 mm + 1 mm Bed rail Bed Rail Sm0064-1 FIG. 5-29 5-31 doc111517 SAWMILL ALIGNMENT...

  • Page 133: 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 134: Ec Declaration Of Conformity

    EC declaration of conformity according to EC Machinery Directive 2006/42/EC Annex II, 1.A We herewith declare, Wood-Mizer Industries Sp. z o.o. 114 Nagorna street, 62-600 Kolo; Poland. That the following described machine in our delivered version complies with the appropriate basic safety and health requirements of the EC Machinery Directive 2006/42/EC based on its design and type, as brought into circulation by us.

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