woodmizer LT70 Series User manual

Debarker Option
Safety, Installation, Operation,
Maintenance & Parts Manual
LT70 Debarker rev. A.1
Safety is our #1 concern! Read and understand
all safety information and instructions before oper-
ating, setting up or maintaining this machine.
Form #558
!

2 98DBdoc031319 Table of Contents
Table of Contents Section-Page
SECTION 1 SAFETY & GENERAL INFORMATION 1-1
1.1 Installation and Maintenance..................................................................................... 1-1
1.2 Operation and Towing............................................................................................... 1-2
SECTION 2 DEBARKER INSTALLATION 2-1
2.1 Debarker Frame Mounting Holes.............................................................................. 2-1
2.2 Debarker Installation ................................................................................................. 2-2
2.3 Wiring Instructions.................................................................................................... 2-5
2.4 Control Component Installation ................................................................................ 2-6
2.5 Alignment .................................................................................................................. 2-9
SECTION 3 OPERATION AND MAINTENANCE 3-1
3.1 Locking Pin Operation .............................................................................................. 3-1
3.2 Operation ...................................................................................................................3-2
3.3 Maintenance .............................................................................................................. 3-3
3.4 Troubleshooting......................................................................................................... 3-8
SECTION 4 DEBARKER PARTS 4-1
4.1 How To Use The Parts List ....................................................................................... 4-1
4.2 Sample Assembly ...................................................................................................... 4-1
4.3 Blade Motor Assembly, LT70AC ............................................................................. 4-2
4.4 Blade Motor Assembly, LT70DC ............................................................................. 4-4
4.5 In/Out Motor Drive Assembly................................................................................... 4-6
4.6 Wider Debarker Assembly ..................................................................................... 4-8
4.7 AC Debarker Blade Drive .................................................................................... 4-11
4.8 DC Debarker Blade Drive ..................................................................................... 4-13

Safety & General Information
Installation and Maintenance
Safety & General Information DBdoc031319 1-1
1
SECTION 1 SAFETY & GENERAL INFORMATION
This symbol calls your attention to instructions concerning your personal safety. Be sure
to observe and follow these instructions. This symbol accompanies a signal word. The
word DANGER indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury. WARNING suggests a potentially hazardous situation
which, if not avoided, could result in death or serious injury. CAUTION refers to potentially
hazardous situations which, if not avoided, may result in minor or moderate injury to per-
sons or equipment. Read all safety instructions before operating this equipment and
observe all safety warnings!
1.1 Installation and Maintenance
DANGER! On electric mills, hazardous voltage inside the
disconnect box, starter box, and at the electric motor can
cause shock, burns, or death. Disconnect and lock out
power supply before performing debarker installation! Fol-
low all applicable electrical codes.
DANGER! On gas/diesel mills, before performing any ser-
vice to this equipment, turn the key to the OFF position,
remove the key, and disconnect the sawmill battery ground
terminal. Failure to do so will result in serious injury or
death.
DANGER! Make sure all electrical installation, service
and/or maintenance work is performed by a qualified elec-
trician and is in accordance with applicable electrical codes.
Failure to do so will result in serious injury or death.
WARNING! Before replacing the debarker blade, move the
sawmill blade guide arm in front of the sawmill blade to
cover the blade teeth. Failure to do so may result in serious
injury or death.

Safety & General Information
Operation and Towing
1
1-2 DBdoc031319 Safety & General Information
1.2 Operation and Towing
DANGER! Make sure all guards and covers are in place
and secured before operating the debarker option. Failure
to do so may result in serious injury.
DANGER! Keep all persons out of the path of moving
equipment when operating the debarker. Failure to do so
will result in serious injury.
DANGER! Always remove the key from the control panel
before preparing the debarker for towing. Failure to do so
may result in serious injury.
WARNING! If the debarker continues to run with the key
switch in the OFF position, remove the negative battery ter-
minal from the battery post.
DO NOT continue to operate the mill if the main key switch
does not control debarker operation. Doing so could result
in serious injury. Call Wood-Mizer customer service for
more information.

Safety & General Information
Operation and Towing
Safety & General Information DBdoc031319 1-3
1
See Table 1-1. Pictogram decals used to warn and inform the user about danger in the
LT15/20 Debarker.
TABLE 1-1
Decal View W-M No. Description
101216 CAUTION! Read thoroughly the manual
before operating the machine. Observe all
safety instructions and rules when
operating the sawmill.
101217 CAUTION! Keep away from debarker
blade!
101218 CAUTION! Disconnect power supply
before servicing the debarker.
S20097 Debarker Motor Rotation Direction
100582 a. Debarker On/Off (option)
b. Starting motor
c. Debarker In/Out (option)
101216
101217
101218
S20097
100582
I0 I0
abc

Debarker Installation
Debarker Frame Mounting Holes
2
2-1 DBdoc031319 Debarker Installation
SECTION 2 DEBARKER INSTALLATION
DANGER! On electric mills, hazardous voltage inside the
disconnect box, starter box, and at the electric motor can
cause shock, burns, or death. Disconnect and lock out
power supply before performing debarker installation! Fol-
low all applicable electrical codes.
DANGER! Before performing any service to this equip-
ment, turn the key to the OFF (0) position, remove the key,
and disconnect the sawmill battery ground terminal. Failure
to do so will result in serious injury or death.
The Debarker Option may be installed to the LT70 sawmills with production date
01.06.2009 and later.
2.1 Debarker Frame Mounting Holes
IMPORTANT! Sawmills are equipped with pre-drilled Debarker mounting holes. Verify
hole locations before beginning Debarker installation. Proper hole location is
imperative for safe and effective Debarker operation.

Debarker Installation
Debarker Installation
Debarker Installation DBdoc031319 2-2
2
2.2 Debarker Installation
1. Remove the hole plugs from sawmills saw head (1).
FIG. 2-1
Remove the
hole plug

Debarker Installation
Debarker Installation
2
2-3 DBdoc031319 Debarker Installation
2. Assemble the debarker to the sawmill saw head. Align the debarker arm holes and the
holes in the saw head. Insert the bolts through the debarker mounting plate holes and
screw to secure in place. Route the debarker wire harness through the protective conduit
and next through the saw head hole and debarker arm.
FIG. 2-2

Debarker Installation
Debarker Installation
Debarker Installation DBdoc031319 2-4
2
3. Take out the wire harness from the debarker arm. Slide the debarker motor harness
through one of the supplied harness clamps.
See Figure 2-3.
FIG. 2-3

Debarker Installation
Wiring Instructions
2
2-5 DBdoc031319 Debarker Installation
2.3 Wiring Instructions
DANGER! On electric mills, hazardous voltage inside the
disconnect box, starter box, and at the electric motor can
cause shock, burns, or death. Disconnect and lock out
power! Follow all applicable electrical codes.
DANGER! On diesel/gas sawmill, before performing any
service to this equipment, turn the key to the OFF (0) posi-
tion, remove the key, and disconnect the sawmill battery
ground terminal. Failure to do so will result in serious injury
or death.
IMPORTANT! Avoid pinch and pivot points, unnecessary
wire bending and open spaces where the wire could get
caught by a log, etc. If you have any questions, call
Wood-Mizer customer service.
1. The debarker wires are pre-wired for the debarker option. The debarker wires are
pre-routed and stored under a guard which is removed before debarker installation (See
Section 2.2).
IMPORTANT! Make sure that the ring terminals do not
touch the motor body.
!
!

Debarker Installation
Control Component Installation
Debarker Installation DBdoc031319 2-6
2
2.4 Control Component Installation
DANGER! On electric mills, hazardous voltage inside the
disconnect box, starter box, and at the electric motor can
cause shock, burns, or death. Disconnect and lock out
power! Follow all applicable electrical codes.
DANGER! On gas/diesel mills, before performing any ser-
vice to this equipment, turn the key to the OFF (0) position,
remove the key, and disconnect the sawmill battery ground
terminal. Failure to do so will result in serious injury or
death.
1. Remove the front panel (leave wire connections) from the control box.
2. Using the back side of the front panel for a guideline, cut out holes in the front panel lexan
decal for the debarker switches. Install the provided toggle switches, on/off switch, nylon
washer, and rubber boot in place as shown.
See Figure 2-4.
FIG. 2-4
3h1023
In/Out Switch
On/Off Switch
Nylon Washer
Rubber Boot

Debarker Installation
Control Component Installation
2
2-7 DBdoc031319 Debarker Installation
3. Locate the two wire harnesses on the floor of the sawmill control box (one has two red
wires, the second has two red and two black wires).
4. Connect the two red wires from the first harness to the debarker on/off switch. Connect
the two black and the two red wires from the second harness to the debarker in/out toggle
switch as shown on the picture below.
NOTE: If the debarker arm movement direction is not
appropriate (for e.g. the arm moves out when the switch is
switched left), interchange the 21 and 22 wires connection.
See Figure 2-5. LT70AC Control Panel Debarker Wires Connection.
FIG. 2-5
3h1024
2
2
2
1

Debarker Installation
Control Component Installation
Debarker Installation DBdoc031319 2-8
2
See Figure 2-6. LT70DC Control Panel Debarker Wires Connection.
5. Reinstall the front panel.
FIG. 2-6
3h1025
22
2
1

Debarker Installation
Alignment
2
2-9 DBdoc031319 Debarker Installation
2.5 Alignment
DANGER! Before performing any service to this equip-
ment, turn the key to the OFF (0) position and remove the
key. Failure to do so will result in serious injury or death.
Following adjustments are required for proper debarker operation:
The debarker blade should be centered with the sawmill blade.
The debarker blade should remain parallel to the sawmill blade throughout the
debarker’s range of motion.
1. Turn the key to ON and use the debarker in/out switch to move the debarker all the way
in. Turn the key to OFF (0) and remove the key. This will prevent the debarker from being
turned on while performing alignment procedures.
2. Clip the blade guide alignment tool to the sawmill blade. Make sure the tool lies flat on the
blade and does not contact a tooth that could cause it to angle.

Debarker Installation
Alignment
Debarker Installation DBdoc031319 2-10
2
See Figure 2-7.
3. Check the height of the debarker blade against the alignment tool. The bottom edge of
the tool should align with the center of the debarker blade.
To adjust the blade up or down, loosen the four blade motor mount bolts. Loosen the jam
nuts on the adjustment bolts. Turn the adjustment bolts clockwise to push the motor and
blade down. Turn the adjustment bolts counterclockwise and slide the motor up to raise
the motor and blade. Retighten the jam nuts on the adjustment bolt and four motor mount
bolts.
NOTE: If the adjusting range is insufficient, unscrew the
positioning bolts and change the adjustment assembly
position.
4. Insert the key and use the debarker in/out switch to move the debarker all the way out.
Turn the key to OFF (0) and remove the key.
FIG. 2-7
Adjust bolts to move
motor and blade up
or down
Loosen jam
nuts Loosen motor mounting
bolts (4)
Alignment tool
Sawmill blade
Debarker blade Debarker blade
thickness (7mm)
Adjustment
assembly posi-
tioning bolts

Debarker Installation
Alignment
2
2-11 DBdoc031319 Debarker Installation
5. Move the blade guide alignment tool on the sawmill blade and check the position of the
debarker blade against the tool. If the debarker blade is not centered with the tool, you will
need to adjust the debarker mount.
Loosen the four debarker mounting bolts and use a mallet to adjust the debarker arm
position. The mounting holes are oversized to allow small adjustments of the debarker.
Tilt the debarker mount until the debarker blade is centered on the tool. Recheck the
debarker blade with the debarker all the way in and all the way out.
When the debarker blade is centered on the tool in both positions, tighten the debarker
mounting bolts.
See Figure 2-8.
FIG. 2-8
Loosen mounting bolts to
tilt debarker frame
Debarker
turning point

Operation and Maintenance
Locking Pin Operation
Operation and Maintenance DBdoc031319 3-1
3
SECTION 3 OPERATION AND MAINTENANCE
3.1 Locking Pin Operation
See Figure 3-1. The debarker is equipped with a locking pin located on the debarker arm.
Two hole locations are provided for the locking pin.
Before operating the debarker, make sure the locking pin is removed. Turn the key
switch to OFF (0) and remove the key. Pull the debarker out to relieve pressure on the
locking pin. Pull down split cotter. Remove the locking pin.
Before towing the sawmill, lock the debarker in the travel position. Turn the key switch
to OFF (0) and remove the key. Manually move the debarker arm to align the holes. Insert
the locking pin and secure with the split cotter.
FIG. 3-1
3h1010
Locking Pin
Split cotter

Operation and Maintenance
Operation
3
3-2 DBdoc031319 Operation and Maintenance
3.2 Operation
The Debarker Option allows you to remove bark from logs before cutting.
DANGER! Make sure all guards and covers are in place
and secured before operating the debarker option. Failure
to do so may result in serious injury.
DANGER! Keep all persons out of the path of moving
equipment when operating the debarker. Failure to do so
will result in serious injury.
1. Use the in/out switch on the control box to pivot the debarker all the way out.
2. Move the sawmill saw head forward and pivot the debarker in until the front fence
engages with the end/side of the log. Continue to pivot the debarker in until the spring
arm is half loaded.
3. Turn the debarker on/off switch to ON (1).
4. Proceed with cutting. The spring will keep the debarker against the side of the log.
NOTE: The debarker can continuously remove up to
approximately 2cm of material from the log; no motor cool
down time is required. Slower feed rates may be required
for optimal debarker operation.
5. Once the saw head is past the end of the log, pivot the debarker away from the log.
Return the saw head.
6. When done sawing and ready to store or transport the sawmill, place the debarker in its
travel position before towing the sawmill (See Section 3.1).
!

Operation and Maintenance
Maintenance
Operation and Maintenance DBdoc031319 3-3
3
3.3 Maintenance
DANGER! Before performing any service to this equip-
ment, turn the key to the OFF (0) position and remove the
key. Failure to do so will result in serious injury or death.
1. Periodically check the flexible guard. Adjust the guard up or down so the bottom is even
with the bottom of the debarker blade. Replace the guard as needed.
2. Periodically check the debarker blade. Align or replace as needed.
WARNING! Before replacing the debarker blade, move the
sawmill blade guide arm in front of the sawmill blade to
cover the blade teeth. Failure to do so may result in serious
injury or death.
To replace the debarker blade, remove the lower blade guard plate.
Place one wrench on the blade arbor, above the blade bearing. Place the other wrench
on the lower bolt and rotate counter-clockwise. Remove the bolt and washer. Remove the
blade and spacer. Reinstall the spacer with the new blade. Reinstall the bolt and washer
and turn clockwise to tighten. Reinstall the blade guard plate.
Unscrew the three mounting bolts. Remove the bushing and the blade. Reinstall the
bushing with the new blade. Reinstall the bolt and washer. Reinstall the blade guard
plate.

Operation and Maintenance
Maintenance
3
3-4 DBdoc031319 Operation and Maintenance
WARNING! Adjusting the belt and spring tension
(described below) is very important. Failure to do it properly
will result in damage to the debarker blade motor.
3. Once a week check belt for tension and wear. Adjust or replace as necessary. To tighten
the belt, turn the key switch to OFF (0) and remove the key. Remove the belt guard and
loosen the four motor mount screws. Turn the adjustment nut clockwise to move the
motor out and tighten the belt. The belt should be tensioned to allow 6-7mm deflection
measured halfway between the pulleys with 2 kg force. Retighten the motor mount
screws and replace the belt guard.
See Figure 3-2.
FIG. 3-2
1
/
2
2kg
6-7 mm
Belt Adjustment
Nut