woodmizer LT70 Series User manual

Wood-Mizer®
Remote Operation
LT70 AC Remote - ST rev. A1.00
Operator’s Manual
This manual is to replace the related appropriate
information from the non-remote sawmill
Operator’s Manual
Form #681
!

Table of Contents Section-Page
2 ROdoc070822 Table of Contents
SECTION 1 REMOTE OPERATION 1-1
1.1 Sawmill Major Components...................................................................................... 1-2
1.2 Machine and Site Preparation.................................................................................... 1-3
1.3 Preparing for Remote Operation ............................................................................... 1-5
1.4 Remote Sawmill Operation ....................................................................................... 1-6
1.5 Preparing The Remote Option For Towing............................................................... 1-7
1.6 Cold Weather Operation............................................................................................ 1-8
1.7 Hydraulic Control Operation..................................................................................... 1-9
1.8 Loading, Turning, And Clamping Logs .................................................................. 1-11
SECTION 2 MAINTENANCE & TROUBLESHOOTING 2-1
2.1 Clean The Cable Chain & Support Tray ................................................................... 2-1
2.2 Cable Chain Repair.................................................................................................... 2-2
2.3 Cable Chain And Support Tray Alignment............................................................... 2-3
2.4 Board Removal Bumper Adjustment ........................................................................ 2-5

Table of Contents Section-Page
Table of Contents ROdoc070822 3
SECTION 3 REPLACEMENT PARTS 3-1
3.1 How To Use The Parts List ....................................................................................... 3-1
3.2 Sample Assembly ...................................................................................................... 3-1
Protective Conduits, LT70L Super Hydraulic Hoses
3.3 Remote Control Box ................................................................................................ 3-3
3.4 Remote Control Box M-Super frame ................................................................... 3-5
3.5 Remote Control Box Parts......................................................................................... 3-7
3.6 Hydraulic Control Box, 7-Section Remote Control ................................................ 3-10
3.7 Hydraulic Control Box, 12-Section Remote Super ................................................. 3-13
3.8 Remote Control Box (16-Section) ................................................................. 3-16
3.9 Remote Control Box (14-Section) 2x5.5kW ......................................................... 3-18
3.10 Remote Control Box, Super, 16-Section ............................................................... 3-20
3.11 Remote Control Box, 22-Section .......................................................................... 3-22
3.12 Board Return Table ............................................................................................. 3-25
3.13 Electric Box & Cable Connectors (African BS Version) .................................... 3-27
3.14 Cable Connectors (African BS Version) .............................................................. 3-28
3.15 Plate w/Connectors (African BS Version) .............................................................. 3-31
3.16 Hydraulic Fittings (African BS Version) ............................................................ 3-32
3.17 Adaptation Kit, Board Removal Bumper ............................................................. 3-33
3.18 Board Removal Bumper ...................................................................................... 3-34
3.19 Board Removal Bumper Assembly ...................................................................... 3-36
3.20 Board Removal Bumper ...................................................................................... 3-37
3.21 Bed Extension LT70 Remote .............................................................................. 3-39
3.22 Remote Equipment for Installation on a Wall (Cutting Length of 6.5 m) ............ 3-41
3.23 Remote Equipment for Installation on a Wall (Cutting Length of 6.5-10 m ) ...... 3-42
3.24 Guide Rail Support Post ........................................................................................ 3-43
3.25 Guide Rail Support Post ....................................................................................... 3-45
3.26 4-Post Remote Set ................................................................................................. 3-47
3.27 5-Post Remote Set ................................................................................................. 3-48
3.28 Support Assembly, Hoses & Cables ..................................................................... 3-49
3.29 Support Assembly, Hoses & Cables ..................................................................... 3-50
3.30 Support Assembly, Hoses & Cables ..................................................................... 3-51
3.31 Support Assembly, Hoses & Cables ..................................................................... 3-52
3.32 Hoses & Cables .................................................................................................... 3-53
3.33 Cable Duct ............................................................................................................ 3-54
3.34 LT70H E30 RC Motor Kit ................................................................................... 3-55
3.35 Electric Box, ST 4 kW (557006) .......................................................................... 3-56
3.36 Electric Box, ST 4 kW (557003) ......................................................................... 3-57
3.37 Roller with Rubber Bushing ................................................................................. 3-58
3.38 Side Of The Platform(545626) ............................................................................. 3-59

Remote Operation
1
1-1 ROdoc070822 Remote Operation
SECTION 1 REMOTE OPERATION
The Remote Option provides remote operation for all sawmill functions from a single
location at the front of the sawmill. The option includes all cables with traveling guide
chain, a remote electrical power junction box, a front-mounted sawmill control box, and a
remote clutch mechanism with switch to engage the blade from the remote location.

Remote Operation
Sawmill Major Components
Remote Operation ROdoc070822 1-2
1
1.1 Sawmill Major Components
FIG. 1-1
Saw Head
Cable Chain
Guide
Operator’s Stand
Bed Frame
LT70AC Remote - ST
Board Return
Table
Saw Head

Remote Operation
Machine and Site Preparation
1
1-3 ROdoc070822 Remote Operation
1.2 Machine and Site Preparation
The Wood-Mizer LT70 Remote-ST sawmill has to be prepared to work after
transportation. Due to the weight, it has to be transported with auxiliary carrier equipment
and in accordance with general safety rules.
The moulder must be installed in the work-place as instructed in the operator’s manual.
To ensure safe operation of the machine, the work-place dimensions should be
13 m x 3,5 m. If your machine is equipped with bed extension, prepare an appropriately
larger work area. The work-place must be protected from rain and snow.
Before sawmill setup remove the control panel from the sawmill bed frame.
FIG. 1-2

Remote Operation
Machine and Site Preparation
Remote Operation ROdoc070822 1-4
1
Prepare concrete foot pads according to the drawing below.
FIG. 1-3

Remote Operation
Preparing for Remote Operation
1
1-5 ROdoc070822 Remote Operation
1.3 Preparing for Remote Operation
Set up the sawmill as instructed in your sawmill operator’s manual.
CAUTION! Moving the saw carriage before removing the
cable chain support may cause damage to the chain. Also,
moving the saw carriage when the chain is frozen can
damage the chain. See Section 1.6 for recommended chain
deicing procedure.
See Figure 1-4. Before moving the saw carriage, remove the cable chain support
bracket.
1. Disengage the rubber strap holding the cable chain to the support bracket.
2. Loosen the handles and remove the support bracket from the sawmill track rail.
3. Place the support bracket on the storage bracket located on the sawmill frame between
the first and second bed rails. Tighten the handles to secure the support bracket to the
storage bracket and secure the rubber strap in the bracket hole.
FIG. 1-4
Store chain support on
bracket between first
and second bed rails
3H0479
Remove strap
from cable chain Loosen handles
and remove
chain support
Remove strap
from cable chain Loosen handles
and remove
chain support
Store chain support on
bracket between first
and second bed rails

Remote Operation
Remote Sawmill Operation
Remote Operation ROdoc070822 1-6
1
1.4 Remote Sawmill Operation
See Figure 1-5. All sawmill controls operate exactly as described in your sawmill
operator’s manual except the clutch/brake. Instead of pulling a handle to engage the
blade, push the toggle switch on the control panel up. Hold the switch up until the clutch
motor stops completely. The remote clutch mechanism will disengage the brake, rev the
motor to full throttle, and start the blade spinning.
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.
To stop the blade and engage the blade brake, push the toggle switch down. This will also
return the engine to idle.
NOTE: Be sure the toggle switch stays in the up or down position. The boot on the switch
may spring the switch back to neutral. You may need to hold the switch in position until
the remote clutch motor completes its cycle.
IMPORTANT! If you sawmill is equipped with board return tables, minimum board lenght
is 2 meter.
FIG. 1-5
3H0362

Remote Operation
Preparing The Remote Option For Towing
1
1-7 ROdoc070822 Remote Operation
1.5 Preparing The Remote Option For Towing
1. After placing the saw head in its traveling position, engage the remote clutch switch to
engage the drive belts. This will keep the engine from bouncing while towing the sawmill.
2. Place the chain support bracket under the cable chain, located between the first and
second bed rails.
See Figure 1-6.
3. Tighten the support handles and secure the chain to the support with the rubber strap.
FIG. 1-6
Install chain support
to top track rail between
first and second bed rails
Clamp support to
rail with handles
3H0480
Secure chain to
support with strap
Clamp support to
rail with handles
Secure chain to
support with strap
Install chain support to top
track rail between first and
second bed rails

Remote Operation
Cold Weather Operation
Remote Operation ROdoc070822 1-8
1
1.6 Cold Weather Operation
If the sawmill is operated or stored in freezing conditions, the cable chain may freeze.
Before moving the saw carriage, check to see if the chain is frozen:
1. Remove the chain support bracket (See Section 1.3).
2. Pull the chain up at a few locations to determine if it moves freely. If you detect the chain
is frozen, proceed to the recommended deicing procedure below.
3. If the chain seems to move freely by hand, use the power feed to slowly move the saw
carriage toward the rear of the mill. Since the saw carriage returns only at full speed,
moving the saw carriage forward will allow you to slowly engage the cable chain to be
sure it is not frozen. If you detect the chain is frozen, proceed to the recommended
deicing procedure below.
Recommended Cable Chain deicing Procedure
To de-ice the chain, apply a salt solution (preferably calcium chloride and water) to the
entire length of the chain. Allow the solution to sit until the chain can move freely. The
strength of the solution and time required to free the chain will depend on how cold the
weather is and how much ice has accumulated in the chain.
Before storing the sawmill after using the salt solution, be sure to rinse the salt from any
metal portions of the sawmill frame to prevent corrosion. Refer to the recommended
cold-weather storage procedure below to prevent the chain from freezing.
Recommended Cable Chain Ice Prevention Procedure
Before storing the sawmill in freezing temperatures, apply a 50/50 solution of
environmentally safe antifreeze (Sierra) and water to the cable chain. A garden sprayer
can be used to apply the solution.

Remote Operation
Hydraulic Control Operation
1
1-9 ROdoc070822 Remote Operation
1.7 Hydraulic Control Operation
The hydraulic control levers become operational when the contacts at the bottom of the
carriage touch the power strip on the frame tube. The hydraulic control levers will only
work when the cutting head is close enough to the front end of the mill to touch the power
strip.
See Figure 1-7. Hydraulic units have twelve control levers to load, clamp, turn and level
logs.
FIG. 1-7 OPERATOR CONTROL BOX
Clamp
In/Out
Main
Clamp
Up/Down
Main
Front Toe
Board
Up/Down
Rear Toe
Board
Up/Down
Loader
Log Turner
Up/Down
Log Turner
Drive
Rear Toe
Board
Drive
Clamp
Up/Down
Front
Clamp
In/Out
Front
Clamp
Up/Down
Rear
Clamp
In/Out
Rear

Remote Operation
Hydraulic Control Operation
Remote Operation ROdoc070822 1-10
1
Use the hydraulic control levers to get the mill ready to load a log.
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.
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.
Lower the clamp up/down lever to lower the clamp below bed level.
2. Raise the log loader lever to extend the legs of the log loader out as far as they will go.
3. The chain securing the log loading arm to the bed frame will be tight. Manually push the
log loader arm until there is slack in the chain.
4. Unchain the loading arm from the bed frame.
5. Manually lower the log loader so it rests on the ground.
CAUTION! Be careful when manually lowering the log
loader. Do not drop the loader onto the ground or perform
any action which might break the velocity fuse valves on
the loader cylinders. These valves control hydraulic flow
and are necessary to prevent the loading arm from
collapsing during use.
6. Lower the loader lever to lower the loading arm as far as it will go. Logs must be rolled
onto the loading arms one at a time.
7. The front, middle and rear toe boards should be below bed level. Once a tapered log has
been loaded, the front or rear end of the log may be lifted to parallel the heart of the log to
the path of the blade.
The front toe board is raised by lifting the front toe board lever up.The middle toe board is
raised by lifting the middle toe board lever up. The rear toe board is raised by lifting the
rear toe board lever up. Once a flat has been made and the log is ready to be turned,
push the appropriate toe board lever down to lower either toe board until it falls below the
level of the bed.
Use the power roller to move the log forward and backward.

Remote Operation
Loading, Turning, And Clamping Logs
1
1-11 ROdoc070822 Remote Operation
1.8 Loading, Turning, And Clamping Logs
CAUTION! Before loading a log, be sure the cutting head is
moved far enough forward so the log does not hit it.
Damage to the sawmill may result.
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.
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.
3. Raise the side supports.
4. Raise the loader lever to raise the log onto the sawmill bed. Simply let the loader rise until
the log rolls onto the mill bed.
5. Raise the clamp up (raise the clamp up/down lever) to prevent the log from rolling of the
bed.
6. Lower the loading arm. Leave the loading arm about halfway up while squaring the log.
This will stop the log from rolling off the side of the mill.
WARNING! Always leave loading arm halfway up while log
is on sawmill bed. Failure to do so will result in serious
injury or death.
NOTE: Logs also may be loaded onto the mill with a tractor or other equipment
specifically designed for that purpose.
7. Raise the clamp up to prevent the log from rolling of the bed.
8. Raise the clamp up/down lever.

Remote Operation
Loading, Turning, And Clamping Logs
Remote Operation ROdoc070822 1-12
1
To Turn Logs
1. Raise the side supports.
2. Raise the turner lever to engage the log turner arm.
3. Spin the log against the side supports until it is turned the way you want it for the first cut.
4. Engage the clamp by raising the clamp in/out lever. Clamp the log against the side
supports.
5. Lower the side supports.
6. Lower the turner lever to lower the turner arm below the log.
To Turn Logs (Optional Procedure)
If you are turning a small cant, you may opt to use the clamp to turn the cant.
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. Raise the clamp up/down lever to raise the clamp.
2. Raise the clamp in/out lever and clamp the log against the side supports.
3. Lower the turner lever until the turner arm falls below the bed.
4. Use the clamp in/out lever, gently release the clamp.
5. Lower the side supports, to make few cuts.
6. Us e the clamp in/out lever to clamp the log.

Remote Operation
Loading, Turning, And Clamping Logs
1
1-13 ROdoc070822 Remote Operation
Depending on the log length, front and rear clamp (min. log length - 3.5m), or main clamp
together with front or rear one (with logs shorter than 3.5m) can be used . They allow to
find optimal position of the log on the bed, and prevent distortions during cutting.
1. Raise the front/rear clamp up/down lever to raise the clamp.
2. Raise the front/rear clamp in/out lever to clamp the log.
3. Use the middle clamp in/out lever to clamp the log against the side supports.
4. Lower the front/rear clamp up/down lever to lower the clamp, until the log lays flat on the
bed.
To Level A Tapered Log
Use the toe board lever(s) to raise either end of a tapered log, if desired. Log can be
moved forward or backward using the power roller.
Raise the appropriate lever to raise the front or rear toe board until the heart of the log
measures the same distance from the bed rails at each end of the log.

Maintenance & Troubleshooting
Clean The Cable Chain & Support Tray
Maintenance & Troubleshooting ROdoc070822 2-1
2
SECTION 2 MAINTENANCE & TROUBLESHOOTING
2.1 Clean The Cable Chain & Support Tray
As you operate the sawmill, be aware of any pieces of debris that may fall on the cable
chain and/or support tray. Stop the sawmill and immediately remove any pieces of wood,
bark or anything else that may divert the path of the chain or cause it to jam.
Clean the cable chain and support track of sawdust buildup every eight hours of
operation. Blow or brush the sawdust from the track and tray and remove any
accumulated sawdust that is high enough to contact the chain/tray.

Maintenance & Troubleshooting
Cable Chain Repair
2
2-2 ROdoc070822 Maintenance & Troubleshooting
2.2 Cable Chain Repair
If a component of the cable chain breaks or is missing, replace the component.
CAUTION! Do not operate the remote sawmill if the cable
chain is damaged or components of the chain are missing.
The chain components are interlocking and continued
operation will cause more damage to the chain.
See Figure 2-1. To disassemble the chain use a screwdriver to pry the connecting links
apart. After removing the connecting links, the side plates can be disassembled by pulling
them apart at an angle.
FIG. 2-1
3H0485

Maintenance & Troubleshooting
Cable Chain And Support Tray Alignment
Maintenance & Troubleshooting ROdoc070822 2-3
2
2.3 Cable Chain And Support Tray Alignment
During each sawmill setup, check the alignment of the cable chain and the support tray:
1. The chain should travel in a straight line. Traveling at an angle will cause the chain to
prematurely wear and break. Check the alignment of the chain by measuring from the
sawmill frame tube to the center of the chain at the top and bottom. The measurements
should be the same (±1/8”).
See Figure 2-2.
Loosen the mounting bolts at the top or bottom of the chain to adjust the distance from the
sawmill frame tube.
FIG. 2-2
A
B
A = B (±1/8")
3H0507B
Front End View of
Remote Chain
Front end view of
remote chain

Maintenance & Troubleshooting
Cable Chain And Support Tray Alignment
2
2-4 ROdoc070822 Maintenance & Troubleshooting
2. The chain support tray must be level to prevent premature wear of the chain. Use a
square to check the angle of the tray to the sawmill frame. Check at several locations
along the length of the tray.
See Figure 2-3.
Bend the tray up or down as necessary to square it to the sawmill frame.
FIG. 2-3
3H0508B
Front End View of
Remote Chain
90°
Front end view of
remote chain