woodmizer Autoclutch Option User manual

Autoclutch Option
Safety, Installation,
Operation, & Parts Manuals
024338 (Installed) rev. A.00 - D.00
016139 (Boxed) rev. A.00 - D.00
Safety is our #1 concern! Read and understand
all safety information and instructions before oper-
ating, setting up or maintaining this machine.
February 1999
Form #883

©2019
Printed in the United States of America, all rights reserved. No part of this manual may be
reproduced in any form by any photographic, electronic, mechanical or other means or used in
any information storage and retrieval system without written permission from
Wood-Mizer
8180 West 10th Street
Indianapolis, Indiana 46214
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Table of Contents Section-Page
Table of Contents WMdoc120519 iii
TOC
SECTION 1 AUTOCLUTCH INSTALLATION 1-1
1.1 Manual Clutch Lever Removal ..............................................................1-1
1.2 Autoclutch Assembly Installation ..........................................................1-3
1.3 Control Component Installation .............................................................1-6
1.4 Wiring Instructions.................................................................................1-8
1.5 Turnbuckle Adjustment ........................................................................1-10
1.6 Guard Installation .................................................................................1-12
SECTION 2 OPERATION 2-1
SECTION 3 MAINTENANCE 3-1
3.1 Autoclutch Belt.......................................................................................3-1
3.2 Lubrication .............................................................................................3-2
3.3 Drive Belt Adjustment............................................................................3-3
3.4 Autoclutch Linkage ................................................................................3-6
3.5 Microswitch Alignment..........................................................................3-8
3.6 Troubleshooting....................................................................................3-11
SECTION 4 REPLACEMENT PARTS 4-1
4.1 Autoclutch Assembly .............................................................................4-1
Retrofit (3/05)
4.2 Autoclutch Assembly .............................................................................4-3
Rev. D.00
4.3 Autoclutch Assembly .............................................................................4-6
Rev. A.00 - C.00
4.4 Autoclutch Control Parts ........................................................................4-9
4.5 Belt Guards...........................................................................................4-10
Retrofit
4.6 Belt Guards...........................................................................................4-11
Rev. A.00 - D.00
SECTION 5 ELECTRICAL INFORMATION 5-1
5.1 Electrical Components............................................................................5-1
5.2 Electrical Symbol Diagrams...................................................................5-2
5.3 Electrical Wiring Diagrams (Non-Remote Sawmill Only) ....................5-4
5.4 Electrical Wiring Diagrams (Remote Sawmill Only) ............................5-6
INDEX I

Autoclutch Installation
Manual Clutch Lever Removal
1
1-1 AC98doc120519 Autoclutch Installation
SECTION 1 AUTOCLUTCH INSTALLATION
The Autoclutch Option allows you to engage the blade using a toggle switch on the con-
trol panel. This section will instruct you on how to install the option yourself. If your auto-
clutch option was factory-installed with a new sawmill, you can skip to the next section.
1.1 Manual Clutch Lever Removal
1. Raise the saw head so the clutch mounting hardware is located so it is comfortable for
you to work on. Move the saw head forward or back on the frame so you will be able to
easily access the clutch turnbuckle.
2. Turn the key switch to the OFF position and remove the key. Remove the battery box lid
and disconnect the cable from the negative battery terminal.
DANGER! Before performing any service to this equip-
ment, turn the key to the OFF position, remove the key, and
disconnect the cable from the negative terminal on the saw-
mill battery. Remove the blade from the saw head. Failure
to do so will result in serious injury or death.
3. If installing the autoclutch to an electric-powered sawmill, disconnect and lock out the
incoming power supply.
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.
4. Remove the drive belt housing covers to access the clutch handle and turnbuckle linkage.
5. With the clutch handle disengaged (up), locate the clutch pivot plate where both the long
and short turnbuckles are connected.

Autoclutch Installation
Manual Clutch Lever Removal
Autoclutch Installation AC98doc120519 1-2
1
See Figure 1-1.
6. Remove the bolt and nut securing the long and short turnbuckles to the pivot plate. Save
the bolt and nut for installation of the Autoclutch turnbuckle.
7. Remove the bolt and nut securing the short turnbuckle to the engine/motor mount.
Remove the short turnbuckle assembly. Save the bolt and nut for installation of the Auto-
clutch turnbuckle.
8. Remove the three bolts securing the clutch handle to the saw head. Remove the clutch
handle assembly.
FIG. 1-1
Remove clutch handle
assembly
3 Bolts
Disconnect
turnbuckles
3H0506-2
Remove
turnbuckle

Autoclutch Installation
Autoclutch Assembly Installation
1
1-3 AC98doc120519 Autoclutch Installation
1.2 Autoclutch Assembly Installation
1. If you are installing the autoclutch option to a sawmill equipped with a Kubota, Caterpillar,
Yanmar diesel engine or G35 (G38) Kohler gas engine, install the provided collar spacer
to the autoclutch turnbuckle. Loosen the jam nuts and turn the inner and outer links until
they seperate. Install the spacer collar to the inner link. Reassemble the inner and outer
links and tighten the jam nuts.
See Figure 1-2.
FIG. 1-2
3H0813C
Spacer Collar
(For Kubota, Caterpillar,
Yanmar diesel
and G35 (G38) Kohler
gas sawmills only)
Outer Link
Inner Link

Autoclutch Installation
Autoclutch Assembly Installation
Autoclutch Installation AC98doc120519 1-4
1
2. Install the supplied short turnbuckle assembly to the engine/motor mount using the previ-
ously removed bolt and nut. Position the turnbuckle so the end with two hexes is on the
bottom.
See Figure 1-3.
FIG. 1-3
Autoclutch
Turnbuckle
Motor Mount
Bracket
Existing Nut
Existing
Bolt
3H0773-1

Autoclutch Installation
Autoclutch Assembly Installation
1
1-5 AC98doc120519 Autoclutch Installation
3. Install the autoclutch drive assembly to the sawmill saw head:
See Figure 1-4. Remove the three socket head bolts and lock washers from the back of
the autoclutch drive assembly. Place the rear guard (Rev. D Only) over the three slotted
holes located under the engine/motor mount plate. Use the three socket head bolts and
lock washers to install the autoclutch assembly to the saw head.
4. Use the 5/16-18 x 1" bolt, washer, cable clamp, and lock nut supplied in the bag assembly
to secure the top of the autoclutch bracket to the saw head.
5. Connect the autoclutch link arm and turnbuckle to the clutch pivot plate using the previ-
ously removed bolt and nut. The turnbuckles will be adjusted after the autoclutch is
installed and operational.
FIG. 1-4
Autoclutch
Assembly
5/16-18 x 1"
Bolt
5/16" Flat
Washer
5/16-18 Self-Locking
Nut
Cable Clamp
3/8-16 x ¾"
Socket Head Bolt (3)
3/8" Lock Washer (3)
Existing Nut
Existing Bolt
3H0773-3B
Rear
Guard (Rev. D
Only)

Autoclutch Installation
Control Component Installation
Autoclutch Installation AC98doc120519 1-6
1
1.3 Control Component Installation
Install the provided circuit breaker and toggle switch to the sawmill control box.
1. Remove the eight screws securing the front panel to the sawmill control box. Lift the panel
out and flip around to access the back side (leave all wires attached).
See Figure 1-5.
2. Locate the hole for the autoclutch switch (labeled with on the front panel). Care-
fully use a sharp razor knife to cut a hole in the lexan decal, using the hole in the back of
the metal panel as a guide.
3. Be sure the hex nut on the toggle switch is threaded all the way down against the body of
the switch. Install the toggle switch through the panel hole. Position the switch body so
the switch operates up and down. Secure the switch to the panel with the supplied nylon
washer and rubber boot.
FIG. 1-5
Remove
front panel
Cut hole
Install toggle
switch
Secure switch
with nylon washer
and boot
3H0569-2

Autoclutch Installation
Control Component Installation
1
1-7 AC98doc120519 Autoclutch Installation
4. Remove the eight screws securing the rear panel to the sawmill control box. Lift the panel
out and set on top of the control box, leaving all wires attached.
See Figure 1-6.
5. Locate the 3/8" bolt and nut in the rear of the control box toward the right side. Remove
the bolt and nut from the control box. Place the provided 30 amp circuit breaker inside the
control box and insert the breaker reset button through the hole in the rear of the control
box. Secure the breaker to the control box with the boot provided.
6. Peel the back from the provided circuit breaker label and place the decal on the control
box under the circuit breaker.
FIG. 1-6
Remove rear
panel
Remove bolt,
washer, and nut
Install circuit
breaker
Secure breaker
with boot
3H0569-1

Autoclutch Installation
Wiring Instructions
Autoclutch Installation AC98doc120519 1-8
1
1.4 Wiring Instructions
DANGER! The key switch should still be off, the key
removed and the negative battery cable disconnected as
stated at the beginning of this section. The incoming power
supply of electric-powered sawmills should be discon-
nected and locked out. 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.
Refer to the appropriate wiring diagram while perform-
ing the wiring steps below (See Section 5.3).
1. 1998 and newer model sawmills are pre-wired for the autoclutch option. Locate the har-
ness of four wires (#28, 29, 31, & 32) extending from the top of the conduit connecting the
control box to the saw head.
2. Remove any wire ties, tape or cable clamps securing the harness in its storage location. If
necessary, install the provided expandable conduit around the four wires and route the
assembly through the cable clamp you installed behind the autoclutch assembly. Con-
tinue the cable to the autoclutch. NOTE: The laser option wire #25 may be bundled with
the autoclutch option wires. If so, separate wire #25 and return it to the storage location.
3. Pull back the harness conduit to expose the four wires. Connect the 12 gauge black wire
(#32) to the black autoclutch motor wire. Slide the supplied piece of rubber tube over one
of the wires and overlap the terminals on both wires. Fasten the wire terminals together
with the #10-24 x 3/8" screw and lock nut provided. Slide the rubber tube over the termi-
nal connection and wrap with electrical tape.
4. Connect the 12 gauge red wire (#31) to the bottom terminal of the autoclutch solenoid.
Remove the nut from the solenoid terminal and slide the wire ring terminal onto the stud.
Replace the solenoid terminal nut.
5. Connect one of the 14 gauge red wires (#28) to the red wire from the autoclutch engage
switch. These wires have quick connects which simply snap together. Connect the other
14 gauge red wire (#29) to the red wire from the autoclutch disengage switch in the same
manner.

Autoclutch Installation
Wiring Instructions
1
1-9 AC98doc120519 Autoclutch Installation
6. In the control box, locate the harness of four wires (#28, 29, 31, & 32). Remove any wire
ties, tape, or cable clamps securing the harness in its storage location. Pull back the har-
ness conduit to expose the four wires. NOTE: Black wire #32 should be pre-installed to
the ground terminal stud in the bottom of the control box.
7. Connect the 14 gauge red wire (#28) to the bottom terminal of the autoclutch toggle
switch. Slide the wire terminal onto the switch terminal tab. Connect the other 14 gauge
red wire (#29) to the top terminal of the autoclutch toggle switch in the same manner.
8. Connect the pre-installed red wire from the middle terminal of the autoclutch toggle switch
to the Accessory circuit breaker. The Accessory circuit breaker is the second from the left
as you face the front of the control box. Remove the nut from the front circuit breaker ter-
minal stud (closest to the front of the control box). Slide the wire ring terminal onto the cir-
cuit breaker terminal stud and replace the nut. Be sure to maintain all other wire
connections on the circuit breaker terminal.
9. Connect the 12 gauge red wire (#31) to the bottom terminal of the 30 amp circuit breaker
you installed to the back wall of the control box. Slide the wire connector onto the circuit
breaker tab.
10. Connect the pre-installed red wire from the top terminal of the circuit breaker to the
Accessory post on the key switch. Remove the ACC terminal nut, slide the wire ring termi-
nal over the key switch terminal and replace the nut. Be sure to maintain all other wire
connections on the key switch terminal.
11. Use the supplied wire ties to secure all harnesses and/or wires to prevent interference
with any moving components of the saw head or in the control box.
12. Replace the front and rear control box panels and screws. Reconnect the negative bat-
tery cable and replace the battery box cover. Place the key in the key switch and turn to
the "ACC" position. Continue to the next section for autoclutch adjustment procedure.

Autoclutch Installation
Turnbuckle Adjustment
Autoclutch Installation AC98doc120519 1-10
1
1.5 Turnbuckle Adjustment
1. Raise the autoclutch toggle switch until the autoclutch motor quits cycling. The autoclutch
should pivot the engine/motor mount up, engaging the drive belt.
2. Check the drive belt tension (refer to your engine manual for proper drive belt tension
specifications). If adjustment is needed, loosen the bottom lock nut on the autoclutch
turnbuckle.
See Figure 1-7. Tighten the drive belt by adjusting the inner or outer rod link to lengthen
the turnbuckle. Loosen the drive belt by adjusting the inner or outer rod link to shorten the
turnbuckle. Then, tighten the bottom lock nut to secure in place.
FIG. 1-7
Lock Nut
Inner Rod Link
Outer Rod Link
3H0505-3D

Autoclutch Installation
Turnbuckle Adjustment
1
1-11 AC98doc120519 Autoclutch Installation
3. Place a straight edge between the upper and lower clutch pivot centers. Make sure the
middle pivot is aligned to the straight edge. If it is not, adjust the autoclutch link arm.
To adjust, turn the autoclutch link arm to adjust the rod end in or out as required and
repeat Step 3.
See Figure 1-8.
4. Lower the autoclutch toggle switch until the autoclutch motor quits cycling. The autoclutch
should pivot the engine/motor mount down, disengaging the drive belt.
5. With the drive belt disengaged, recheck the autoclutch turnbuckle. Measure the distance
between the outer rod link the inner rod link (outer rod link and spacer collar for Kubota,
Caterpillar, Yanmar diesel or G35 (G38) Kohler gas sawmills). Adjust the brake strap as
needed (refer to your operator’s manual for specific adjustment procedures). If the dis-
tance is less than 1/16", tighten the brake strap. If the distance is more than 1/4", loosen
the brake strap.
FIG. 1-8
1/16”
3H0505E
1/16”
Autoclutch
Link Arm
Upper Pivot
Middle Pivot
See Detail
Lower
Pivot
Straight
Edge
Spacer Collar used
with Kubota, Caterpillar, Yanmar
diesel and G35 (G38) Kohler
gas sawmill only
DETAIL

Autoclutch Installation
Guard Installation
Autoclutch Installation ACdoc120519 1-12
1
1.6 Guard Installation
1. If not already installed, install the front and rear Autoclutch guards:
See Figure 1-9. Use the supplied 1/4-20 x 1/2" bolts and split lock washers to secure the
front guard in place. Rev. D.00 Only: Secure the back guard to the front guard from
underneath using the supplied 1/4-20 x 3/4" bolt.
FIG. 1-9
Front Guard
Rear Guard
(Rev. D.00 Only)
1/4-20 x 3/4" Hex
w/Conical Washer
Head Bolt (Rev. D.00
Only)
1/4" Lock Washer (2)
3H0773-6
1/4-20 x 1/2"
Hex Head Bolt (2)

Autoclutch Installation
Guard Installation
1
1-13 ACdoc120519 Autoclutch Installation
2. Replace all saw head covers. Use the provided lower belt guard assembly to replace the
original lower guard. Assemble the lower belt guard to the mount with the 1/4-20 x 1/2"
hex head bolts and flat washers provided.
CAUTION! When replacing or installing guards, be careful
not to pinch any wiring. Damage to the wiring and/or electri-
cal components may result.
3. Install the guard assembly to the sawmill using six 1/4-20 x 3/4" hex head bolts with coni-
cal washers.
4. If your sawmill is not equipped with a board return mechanism mounted to the saw head,
install the provided auxiliary guard plate as shown.
See Figure 1-10.
FIG. 1-10 AUTOCLUTCH REV. A.00 - A.10
Lower belt
guard
Guard mount
plate
Auxiliary plate (for use with
Non-Super sawmills not equipped
with board return mechanism)
1/4-20 x 1/2"
Hex head bolt (2)
1/4-20 x 3/4"
Hex head bolt
w/conical washer (6)
1/4" Flat washer (2)
3H0609-2B

Operation
Operation AC98doc120519 2-1
2
SECTION 2 OPERATION
See Figure 2-1. All sawmill controls operate exactly as described in your sawmill opera-
tor’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 autoclutch 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.
FIG. 2-1
3H0362

Maintenance
Autoclutch Belt
3
3-1 AC98doc120519 Maintenance
SECTION 3 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 autoclutch installation! Fol-
low all applicable electrical codes.
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.
DANGER! Before performing any service to this equip-
ment, turn the key to the OFF position, remove the key, and
disconnect the battery ground terminal. Failure to do so will
result in serious injury or death.
3.1 Autoclutch Belt
See Figure 3-1. Tighten the clutch belt as necessary to prevent slippage.
Remove the three cover bolts and washers and remove the cover. Loosen the clutch
motor mounting bolts and slide the motor up to tighten the belt.
Inspect the belt for wear or cracks and replace as necessary.
FIG. 3-1
Loosen motor
mount nuts
Adjust motor up to
tighten belt
Remote clutch belt
3H0501

Maintenance
Lubrication
Maintenance AC98doc120519 3-2
3.2 Lubrication
See Figure 3-2. Check the clutch gear box oil level. Remove the level plug at the rear of
the gear box. The oil level should be right at the plug hole.
Drain and refill the gearbox after the first 100 hours of sawmill operation. Use a synthetic
gear oil such as Mobil SHC 634. Repeat every 5000 hours or once a year, whichever
comes first.
Lubricate the autoclutch linkage every 100 hours of operation. Apply a NLGI No. 2 grade
lithium grease to the fitting at the end of the clutch linkage connected to the gear box.
FIG. 3-2
Level Check
Port
Drain
Port
3H0502
Clutch Linkage
Grease Fitting

Maintenance
Drive Belt Adjustment
3
3-3 AC98doc120519 Maintenance
3.3 Drive Belt Adjustment
WARNING! Do not for any reason adjust the engine drive
belts or belt support bracket with the engine running. Doing
so may result in serious injury.
See Table 3-1. See the table below for drive belt tension specifications for your model
sawmill. Measure the belt tension with a gauge. NOTE: Wood-Mizer offers a belt tension
gauge (Part No. 016309) that will let you accurately measure the belt tension.
1. Remove the two belt covers located underneath the engine.
2. Loosen the jam nut at the bottom of the turnbuckle. Turn the hex on the inner link rod
clockwise (as viewed from the bottom) to tighten the belt, counterclockwise to loosen the
belt. Once you reach the maximum adjustment using the bottom jam nut/inner link rod,
adjust the linkage by loosening the top jam nut and turning the turnbuckle clockwise as
viewed from the top.
New Belt Installation/New Sawmill Operation Subsequent Adjustment
Engine/
Motor
Deflection
Inches (mm)
Installation
Force
lbs. (kg)
Check
After
First
Acceptable
Force
lbs. (kg)
Then
Check
Every
Deflection
Inches (mm)
Installation
Force
lbs. (kg)
G24/G25 7/16” (11mm) 14 lbs. (6.35kg) 20 hrs 14 lbs. (6.35kg) 50 hrs 7/16” (11mm) 14 lbs. (6.35kg)
D30 7/16” (11mm) 18 lbs. (8.16kg) 5 hrs 18 lbs. (8.16kg) 50 hrs 7/16” (11mm) 18 lbs. (8.16kg)
D40/E25/
G35
7/16” (11mm) 18 lbs. (8.16kg) 5 hrs 18 lbs. (8.16kg) 50 hrs 7/16” (11mm) 18 lbs. (8.16kg)
TABLE 3-1
50