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

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Wood-mizer LT20 AH Series Safety, Setup, Operation & Maintenance Manual Download Page 79

Troubleshooting Guide

Hydraulic Pressure Test

Troubleshooting Guide

doc092506

4-12

4

4.6

Hydraulic Pressure Test

To check hydraulic pressure:

Operate the loading arm hydraulic lever and read the pressure on the gauge. Hydraulic
pressure is factory-set at 2000 ±100 psi and should not need to be readjusted. The relief
valve adjustment screw shown may be used to fine-tune the hydraulic pressure.

CAUTION!

 Pressure should not exceed 2000 psi. If it does,

the amp draw will rise above the design maximum of 200
amps, and could cause battery and system problems. Pres-
sure above 2000 p.s.i. may also damage the hydraulic
hoses.

Summary of Contents for LT20 AH Series

Page 1: ...ty Setup Operation Maintenance Manual LT20 Series AH rev B2 04 Safety is our 1 concern Read and understand all safety information and instructions before operating setting up or maintaining this machi...

Page 2: ...y are ordered Second Day and Next Day shipping are available at additional cost If You Need Service From Europe call our European Headquarters and Manufacturing Facility in Kolo Poland at 48 63 262600...

Page 3: ...ss A Under 3 000 lbs B 3 001 4 000 lbs C 4 001 5000 lbs Product No 1 LT15 2 LT20 4 LT40 Series 7 LT70 Series Length of the Trailer 20 20 Ft 24 24 35 35 Number of axles on the trailer Year of Manufactu...

Page 4: ...ription of the model number When you pick up your mill you will receive a customer number Both the VIN and your customer number expedite our service to you Please write these numbers below so you have...

Page 5: ...raulic Schematic 1 13 1 15 LT20 Series AH Hydraulic Components 1 14 1 16 LT20 Series AH Hydraulic Hoses 1 15 SECTION 2 SETUP OPERATION 2 1 2 1 Stationary Sawmill Setup 2 1 2 2 Portable Sawmill Setup 2...

Page 6: ...nt 4 11 4 6 Hydraulic Pressure Test 4 12 SECTION 5 SAWMILL ALIGNMENT 5 1 5 1 Pre Alignment Procedures 5 1 5 2 Frame Setup 5 2 5 3 Blade Installation And Alignment 5 2 5 4 Blade Wheel Alignment 5 6 5 5...

Page 7: ...g stripes Read and observe all safety instructions before operating this equipment Also read any additional manufacturer s manuals and observe any applicable safety instructions including dangers warn...

Page 8: ...ure to do so will result in serious injury WARNING Always wear gloves and eye protection when handling bandsaw blades Changing blades is safest when done by one person Keep all other persons away from...

Page 9: ...e the trailer is supporting the sawmill frame when operating a sawmill with adjustable outriggers Failure to do so may result in serious injury or death The adjustable outriggers are intended to suppo...

Page 10: ...or loading and turning logs Failure to do so will result in serious injury DANGER Maintain a clean and clear path for all necessary movement around the mill and lumber stacking areas Failure to do so...

Page 11: ...w bed level before loading a log onto the bed Failure to do so may result in machine damage or cause misalignment CAUTION Before loading a log be sure the cutting head is moved far enough forward so t...

Page 12: ...rail If the wiper presses too firmly against the rail it can cause the power feed to bind CAUTION Never use grease on the mast rails as it will collect sawdust CAUTION Do not use chain lube It causes...

Page 13: ...ne but E15 motor uses two BX81 belts BX81 014819 Engine Drive Belt D22 G18 2BX84 092697 Blade Pulley Belts B57 2 2 To insure proper blade tracking use Goodyear Dayco Super II or Browning belts only P0...

Page 14: ...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 x 042 blades M...

Page 15: ...ls are listed below Engine Motor Type Manufacturer Model No Power Other Specifications 15HP Gasoline Kohler PA44501 15 HP 11HP Electric Tamel SA Poland Sg 132M 2PE 7 5 kW 14 7 A 2950 RPM 13HP Gasoline...

Page 16: ...is listed below Model Length 1 1 Length from hitch to chain bracket Width 2 2 Width from fender to fender Width Operating Position Loading Arms Raised Height 3 3 Height from ground to mast Placing he...

Page 17: ...ven below 1 12 Hydraulic System See Table 1 10 The specifications of the hydraulic system are shown below Maximum Capacity 2300 m3 h Collector Inlet Diameters in front of fan 2x140 MM Motor Power 3 kw...

Page 18: ...Safety General Information Components 1 1 12 25doc092506 Safety General Information 1 13 Components See Figure 1 1 The major components of the Wood Mazer LT20 Series are shown below FIG 1 1...

Page 19: ...N OUT TURNER LOADER ARM RELIEF VALVE SETTING 2000 PSI RELIEF VALVE SETTING 2250 PSI TOEBOARD TOEBOARD FRONT TOEBOARD REAR TOEBOARD TURNER SIDE SUPPORT LOADER ARM LOADER ARM H4 H17 H10 3 8 3 x 7 7 8 1...

Page 20: ...m Bore x 203mm Stroke C4 CJ S270 16 5 0 28 152 Hydromar 088678 Hyd Cylinder 50mm Bore x 152mm Stroke C5 C6 CJ S170 16 4 0 25 152 Hydromar 088681 Hyd Cylinder 40mm Bore x 152mm Stroke C7 C8 CJ S95 16 7...

Page 21: ...087790 3 83m 151 1 4 Front Toe Board Base LT40M 087776 H6 Pink 4 2m 166 3 8 Side Support Cylinder Base LT40S 087791 4 77m 188 3 8 Side Support Cylinder Base LT40M 087777 H7 Plain 4 2m 166 3 8 Side Su...

Page 22: ...ading Arm Branch Base 093329 H14 Blue 4 34m 171 3 8 Loading Arm Cylinder Top LT40S 087795 4 9m 193 3 8 Loading Arm Cylinder Top LT40M 087781 H15 Red 4 34m 171 3 8 Loading Arm Cylinder Bottom LT40S 087...

Page 23: ...m diameter anchor bolts is rec ommended The cement pad should be rated to support 6350 lbs sq ft 31 T m at each sawmill foot position NOTE Make sure the unit is level before securing The sawmill mast...

Page 24: ...m the carriage rest pin Swing the rest pin below bed level 3 Use the power feed switch to move the cutting head toward the front end of the mill Raise the two side supports that will prevent a log fro...

Page 25: ...SETUP OPERATION Stationary Sawmill Setup SETUP OPERATION 25doc092506 2 3 2 See Figure 2 3 FIG 2 3 SM0130 Bed Rail Stop Block Pivot End Rail Side Support...

Page 26: ...o so will result in serious injury or death 1 Unhitch the mill from the vehicle 2 Lower and set the front three outriggers Lift the weight from the locking pin using the jack handle Pull the locking p...

Page 27: ...er and set the remaining rear outriggers 6 Level the sawmill by adjusting the outriggers to raise or lower each end of the sawmill Adjust all outriggers evenly to avoid twisting the mill frame by jack...

Page 28: ...from its storage position 3 Soak the felt wiper with Dexron III transmission fluid 10W30 motor oil or 3 in 1 turbine oil 4 Install the middle track cover so it fits against the rail and secure with t...

Page 29: ...ension until the wheel is pulled in and the blade is lying loose in the blade housing Lift the blade out of the blade housing When installing a blade make sure the teeth are pointing the correct direc...

Page 30: ...e cant con trol or while cutting As the blade and belts heat up and stretch the blade tension will change Also ambient temperature changes can cause tension to change Adjust the ten sion handle as nec...

Page 31: ...f the wheel 5 Use the cant adjustment bolt shown in Figure 2 7 to adjust where the blade travels on the blade wheels To move the blade out on the blade wheel turn the cant adjustment bolt clockwise To...

Page 32: ...cking The Blade 2 2 10 25doc092506 SETUP OPERATION housing cover is in place and secured DANGER After aligning the blade on the wheels always check the blade guide spacing and location See Section 5 f...

Page 33: ...r correctly will ensure cor rect rotation directions of all sawmill motors DANGER Make sure all guards and covers are in place and secured before operating or towing the sawmill Failure to do so may r...

Page 34: ...ps as well as the starter box must be powered with a connector equipped with a secure circuit current change switch The hydraulic power supply turns on automatically by raising or lowering of the cont...

Page 35: ...h A DH5 hydraulic system individual Pull Down clamps are controlled with separate levers In sawmills with A DH7 hydraulic system in out movement of individual clamps is controlled with the same lever...

Page 36: ...A DH7 Hydraulic System Use the hydraulic control levers to get the mill ready to load a log RYS 2 10 RYS 2 11 094795 FRONT AH3 Front Clamp Up Down Rear Clamp Up Down Front Clamp In Out Rear Clamp In...

Page 37: ...92506 2 15 2 DANGER Keep all persons out of the path of moving equipment and logs when operating sawmill or loading and turning logs Failure to do so will result in serious injury CAUTION Always make...

Page 38: ...sawmill 6 When raising the turner lever the side supports rise first After reaching a fully vertical position the turner arm will engage and start to rise 7 Manually lower the log loader so the legs r...

Page 39: ...h the sawmill bed The log turner will operate much easier if the log is centered on the sawmill bed 3 Raise the loader lever to raise the log onto the sawmill bed Simply let the loader rise until the...

Page 40: ...g against the side sup ports 4 Lower the turner lever to lower the turner arm below the log 5 Raise the turner arm to get a new bite on the log 6 Disengage the clamp 7 The log can be turned now Repeat...

Page 41: ...er arm is lowered all the way the side supports will begin to lower Back the clamp off slightly and let the side supports come down until they are positioned below the level of your first few cuts To...

Page 42: ...right side of the control panel Push the switch up to raise the cutting head push the switch down to lower the cutting head Hold the switch in position until the cutting head reaches the desired heigh...

Page 43: ...de should be adjusted so that it is about 1 25 4 mm from the log 2 If necessary use the blade guide arm crank to adjust the outer blade guide Turn the crank clockwise to move the blade guide arm in co...

Page 44: ...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 Th...

Page 45: ...the wood Over feeding results in motor and blade wear and also produces a wavy cut 1 1 Stop the carriage at the end of the cut by turning the carriage feed rate switch counter clockwise until the car...

Page 46: ...log Then bring the carriage back without adjusting the blade up This lets you keep the blade at the current height setting so you can make the next blade height adjustment more quickly DANGER Stay cl...

Page 47: ...Cutting too slowly will waste blade life and lower produc tion 7 As you get to the end of the log slow down the feed rate When the teeth exit the end of the log turn the power feed switch to the neutr...

Page 48: ...ged 2 Stack the flitches on edge against the side supports 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 t...

Page 49: ...hows how many inches the bottom of the blade is above the bed of the mill If you know the height of your blade at each cut you can determine the thickness of lumber you are sawing Example You want to...

Page 50: ...orizontal 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 Th...

Page 51: ...tergent in the water bottle will help clean the blade when cutting wood with a high sap content WARNING Use ONLY water with the water lube acces sory Never use flammable fuels or liquids If these type...

Page 52: ...utting head over the travel rest pin 4 Lower the cutting head until it is seated firmly on the rest pin 5 Continue lowering the head 3 4 19 mm until it contacts the stop bolt located on the mast CAUTI...

Page 53: ...the blade housing cover is in place and secured 8 Remove all loose objects from the bed of the mill Store the cranks for toe boards in the brackets provided at the rear of the mill Store the outrigge...

Page 54: ...ol identifies the interval hours of operation at which each maintenance pro cedure should be performed Be sure to refer to option and engine manuals for other maintenance procedures 3 1 Wear Life See...

Page 55: ...d See The LT20 Parts manual for blade guide rebuild kits and complete roller assemblies See Figure 3 1 2 Make sure the blade screw in the top center of the C frame is 1 16 1 5 mm below the bottom of t...

Page 56: ...e track scrapers as needed Make sure the scrapers fit firmly against the rail If a track scraper needs to be adjusted loosen the thumb screw push the scraper down ward until it fits firmly against the...

Page 57: ...ils MAINTENANCE 25doc092506 3 4 3 3 5 Vertical Mast Rails Lubricate the vertical mast rails with WD40 clean and wipe them dry every 50 hours of operation CAUTION Never use grease on the mast rails as...

Page 58: ...oints e g with WD 40 3 Grease the side supports with a lithium grease every 50 hours of operation 4 Oil all chains with an easily penetrating oil such as WD 40 CAUTION Do not use chain lube It causes...

Page 59: ...h a lithium grease every fifty hours of operation but at least once a week See Figure 3 3 3 8 Blade Wheel Belts 1 Check the blade wheel belts for wear every 50 hours of operation Replace as needed 2 P...

Page 60: ...specifications for your sawmill 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 on...

Page 61: ...92506 3 8 3 4 Tighten the four mounting bolts DC Sawmills To tighten turn the bolt clockwise and to loosen turn it counter clockwise Periodically check the belts for wear Replace if the belt is damage...

Page 62: ...ent fluid wear See Figure 3 6 If you are operating in temperatures 20 to 100 F 29 to 38 C use an all weather hydraulic fluid such as Exxon Univis J26 For alternate fluids and or other temperature rang...

Page 63: ...chain tension so that there is 1 2 5 cm deflection in the center of the chain with a 5 lbs 2 3 KG deflection force WARNING Always secure the cutting head with a chain or a brace before adjusting the u...

Page 64: ...MAINTENANCE Up Down System 3 3 11 25doc092506 MAINTENANCE 3 Loosen the four adjustment bolts shown below Adjust the belt tension and tighten the adjustment bolts FIG 3 8 Adjustment Bolts 20_012...

Page 65: ...ays 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 sprocket nut To tighten the chain move the sprocket to the lef...

Page 66: ...y with the gear reducer pulley WARNING Remove the key from the key switch before adjusting the pulleys Failure to do so may result in serious injury See Figure 3 10 Keep the pulleys aligned to avoid p...

Page 67: ...elt tension as needed WARNING Remove the key from the key switch before adjusting the belt tension Failure to do so may result in serious injury See Figure 3 11 Loosen the adjustment bolts shown below...

Page 68: ...els Change blade wheel belts B 57 Poor sharpening techniques See Sharpener Manual Tension too tight Tension blade to recom mended specifications Blade Does Not Track Right on Drive Wheel Cant adjustme...

Page 69: ...just up down chain Vertical wear pads are too tight Adjust pads Drive belt s loose Adjust belts Lumber Is Not Square Vertical side supports not square to bed Adjust side supports Blade not parallel to...

Page 70: ...lace the up down motor One phase lacks Check circuit breakers in the connectors Motor thermal protector started to work Let the motor cool abd then reset the thermal protector Speed switch circuit ove...

Page 71: ...rred Correct problem See Section 4 3 Power Feed Problems Allow motor to cool before restarting Normal operation factors exceeded eg up down con trol jockeyed excessively Allow motor to cool before res...

Page 72: ...dirty Clean drum switch and lubricate with contact grease supplied by Wood Mizer Drum switch contacts are bad Check that contacts are in good condition and positively close cir cuit Speed switch is wo...

Page 73: ...starting Chain is dragging Make sure chain is centered on cam follower bearing Clean and lubricate chain Adjust chain ten sion Allow motor to cool before restarting Chain is improperly tensioned Adjus...

Page 74: ...r the key switch is in ACC position Disconnect the plug on the left side of the electric box and change the phases using a screwdriver Check whether the emer gency switch is off One phase lacks power...

Page 75: ...or Two Handles Valve assembly switch con tacts are not properly adjusted Locate the valve switch at the bottom of the valve assembly Use a 3MM allen wrench to loosen the set screw on each of the five...

Page 76: ...ow air temperature causing fluid to thicken Allow fluid to warm up Syn thetic fluids are available that allow for hydraulic operation in cold weather conditions Mobil SHC 526 Fluid Leaks From Around C...

Page 77: ...eather conditions Mobil SHC 526 Hydraulic Turner Goes Up Before Or At Same Time As Side Supports Spring weakening in sequence valve Locate sequence valve at top of turner cylinder Turn heavy spring in...

Page 78: ...n 1 8 square with the drive pulley Loosen the engine mounting bolts and rotate the engine if necessary 3 Check front to back movement of the engine does not exceed 1 4 Tighten the motor mount U bolts...

Page 79: ...the gauge Hydraulic pressure is factory set at 2000 100 psi and should not need to be readjusted The relief valve adjustment screw shown may be used to fine tune the hydraulic pressure CAUTION Pressur...

Page 80: ...rollers if necessary See Section 5 18 3 Check and adjust the vertical alignment of the blade guide arm See Section 5 7 4 Check and adjust the horizontal alignment of the blade guide arm See Section 5...

Page 81: ...tube down just enough to lift weight from the trailer tire Adjust the two end outriggers on the main frame tube down just enough to lift weight from the trailer tire All Portable Sawmills Adjust the t...

Page 82: ...ing cover 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...

Page 83: ...the idle side blade wheel The gullet of the blade should ride the same distance from the front edge of the wheel at the top and bottom of the wheel If it does not loosen and tighten the appropriate a...

Page 84: ...nt control Adjustment with the cant control is usually all that is required to track the blade properly on both blade wheels The drive side blade wheel will usually not have to be adjusted If necessar...

Page 85: ...ment of each blade wheel Attach the tool to the blade near the inner blade guide mount Be sure the tool does not rest on a tooth or burr and is lying flat against the bottom of the blade See Figure 5...

Page 86: ...e top and bottom jam nuts 5 Recheck the vertical tilt of the drive side blade wheel with the blade guide alignment tool Readjust the blade wheel as necessary until the front and rear of the tool are t...

Page 87: ...ttom jam nuts To tilt the wheel down 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 8 Rech...

Page 88: ...djusted so that the gullet of an 1 1 4 blade is 3 0 mm out from the front edge of the wheel 1 0 mm See Figure 5 8 Use the cant control adjustment to adjust the idle side blade wheel If the blade is to...

Page 89: ...heel as described for the idle side blade wheel Adjust the drive side blade wheel if necessary See Figure 5 9 Use the horizontal adjustment screw to adjust the drive side blade wheel Loosen the jam nu...

Page 90: ...ither one loosen the stop bolt and adjust the adjustment nuts until the roller cannot be spun by hand Check the other roller and adjust if necessary Adjust both rollers until each evenly supports the...

Page 91: ...0 mm 0 04 to the pivot rail support NOTE Adjustments of the lower track rollers change the angle between the cutting head and sawmill bed rails Only small adjustments of the lower track rollers shoul...

Page 92: ...SAWMILL ALIGNMENT Adjusting The Lower Track Rollers 5 5 13 doc092506 SAWMILL ALIGNMENT See Figure 5 12 FIG 5 12 Stop Screw...

Page 93: ...ng set screws and turn the inner height adjustment nut to adjust the height of the inner end of the pivot rail See Figure 5 13 6 Loosen the jam nut and turn the outer height adjustment bolt to adjust...

Page 94: ...d turn the adjustment bolts to move the bed rails to the blade if necessary 10 Retighten the clamping bolts and adjustment bolts 11 Without adjusting the cutting head height check the three remaining...

Page 95: ...om the top of the bed rail to the arm in the closed position is the same as the measurement from the top of the bed rail to the arm in the open position If the arm is too low in the closed position lo...

Page 96: ...ical Adjustment 5 5 17 doc092506 SAWMILL ALIGNMENT closed position 7 The blade guide arm should be snug but not too tight in the rollers You should be able to move it in and out with firm hand pressur...

Page 97: ...ion If necessary remove the backlash See Figure 5 16 To check if the backlash is present grasp the outside part of the saw head and move it as shown in the figure below To remove the backlash perform...

Page 98: ...T 2 Tighten the two adjustment bolts evenly to remove the backlash 3 Tighten the set screws and the nuts CAUTION Do not overtighten the adjustment bolts Dam age to the up down system may result FIG 5...

Page 99: ...e Rope Adjustment SAWMILL ALIGNMENT doc092506 5 20 5 5 9 Blade Guide Rope Adjustment Adjust the blade guide rope tension when it gets too loose and begins slipping To do this use the adjustment nuts s...

Page 100: ...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 2 Close the throat to within 15 mm 0 6 from fully closed Check to see that the flange is the same...

Page 101: ...rs furthest from the arm motor inward will cause the flange to move away from the blade 5 Adjusting the two outside rollers outward will cause the flange to move toward the blade 6 Adjust until the ro...

Page 102: ...e cutting head It is referred to as the outer assembly and is adjustable for various widths of materials to be processed Blade guide alignment includes four steps Blade Deflection Blade Guide Vertical...

Page 103: ...he blade 2 Install the blade guides Make sure the two set screws shown are threaded into the blade guide shaft until they touch each other See Figure 5 22 3 Loosen the bottom jam nut and tighten the t...

Page 104: ...the blade See Figure 5 23 3 Measure the distance from the bed rail to the bottom of the tool NOTE If the sawmill is equipped with stainless steel bed rail covers be sure to measure from the blade gui...

Page 105: ...until the measurement from the bed rail to the tool equals the other two measurements taken 10 Move the tool close to the other blade guide and repeat the previous steps NOTE If major adjustments to b...

Page 106: ...st the inner blade guide so the blade guide flange is approximately 1 5 3 0 mm 0 06 0 12 from the back of the blade 2 Loosen one side and one top set screw shown Tap the blade guide forward or backwar...

Page 107: ...e roller and measure between the back edge of the blade and the ruler at the end closest to the inner blade guide B 4 Measure between the back edge of the blade and the other end of the ruler A 5 The...

Page 108: ...en sawing The sides sup ports must be square to the bed to ensure square lumber 1 Swing the side support down 2 Measure between the face of the support and the main bed tube Make measurements at both...

Page 109: ...hat 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 28 4 Check the angle of each support with a square on the board 5 The...

Page 110: ...e for the drop use the lower track roller horizontal nuts to raise the outside of the saw head 1 5 mm 0 06 1 Move the cutting head so the blade is positioned 375 mm 14 76 above a bed rail 2 Adjust the...

Page 111: ...SAWMILL ALIGNMENT Saw Head Tilt SAWMILL ALIGNMENT doc092506 5 32 5 See Figure 5 30 FIG 5 30 375 mm 1 mm Blade Bed Rail Sm0064 1 375 mm 1 mm...

Page 112: ...Mea sure 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 See Figure 5 31 2 View the blade height scale with eyes level with th...

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