Woodland Mills HM122 User manual

BULLETIN: POST SLEEVE
BUSHINGS
ASSEMBLY INSTRUCTIONS
PSBR-MY2020-EN: Rev A Publication Date: 29-Jul-2020
Sawmill Post Sleeve Bushing Replacement

Post Sleeve Bushing Replacement
Most Sawmill Models
TABLE OF CONTENTS
TABLE OF CONTENTS 1_______________________________________
COMPATIBILITY 2_____________________________________________
VARIANTS 2__________________________________________________
DISASSEMBLY 3______________________________________________
RAISE SAWHEAD 3_________________________________________
REMOVE ADJUSTABLE BLADE GUIDE 4________________________
REMOVE BLADE GUARD—HM126 & HM130MAX 4_______________
REMOVE BLADE GUARD—HM122 5____________________________
REMOVE GUIDE ARM—HM122, HM126 & HM130MAX 6___________
REMOVE GUIDE ARM—HM130 7_______________________________
REMOVE CARRIAGE—HM130MAX 9____________________________
REMOVE OLD POST SLEEVE BUSHINGS 10____________________
INSTALLATION 11_____________________________________________
ASSEMBLE UPPER POST SLEEVE BUSHINGS 11________________
ASSEMBLE LOWER POST SLEEVE BUSHINGS 12________________
FULLY TIGHTEN HARDWARE 14________________________________
ABG CALIBRATION—HM130MAX 15_____________________________
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Post Sleeve Bushing Replacement
Most Sawmill Models
COMPATIBILITY
The new U-shaped nylon bushings are designed to work with the following sawmill models:
Eight (8) bushings are required for each sawmill—four (4) per post sleeve.
VARIANTS
There are two bushing variants depending on the sawmill carriage post dimensions:
Sawmill Model
Model Years
Bushing Compatible?
HM122
2019 & Earlier
No
2020 & Newer
Yes
HM126
2015 & Earlier
No
2016 & Newer
Yes
HM130
2019 & Earlier
Yes
HM130MAX
2020 & Newer
Yes
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80 X 50 MM RECTANGULAR POSTS
HM130 & HM130MAX SAWMILLS
50 X 50 MM SQUARE POSTS
HM122 & HM126 SAWMILLS

Post Sleeve Bushing Replacement
Most Sawmill Models
DISASSEMBLY
RAISE SAWHEAD
Raise the sawhead up high enough to access the lower post sleeve bushings. Do not raise it all
the way to the top otherwise there will not be sufficient room to access the upper bushings.
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Post Sleeve Bushing Replacement
Most Sawmill Models
REMOVE ADJUSTABLE BLADE GUIDE
**If the sawmill does not utilize an adjustable blade guide, skip this section and proceed
to section, REMOVE OLD POST SLEEVE BUSHINGS, on Page 10.**
To gain access to the lower post sleeve bushings and hardware on sawmills with adjustable
blade guides (ABG), part or all of the ABG will need to be removed depending on the sawmill
model.
REMOVE BLADE GUARD—HM126 & HM130MAX
On 2020 and newer HM126 or HM130MAX sawmills with an ABG, remove the yellow blade
guard by unthreading the knob in the front.
Then tilt the guard up and remove it from the sawmill.
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Post Sleeve Bushing Replacement
Most Sawmill Models
REMOVE BLADE GUARD—HM122
On 2020 and newer HM122 sawmills with an optional ABG, remove the yellow blade guard by
unthreading the knob in the front.
Pull the guard out until the large hole at the end of the slot on the back of the guard aligns with
the screw and nylon washers. Tilt the guard under the blade and remove it from the sawmill.
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Align hole in end
of slot with screw

Post Sleeve Bushing Replacement
Most Sawmill Models
REMOVE GUIDE ARM—HM122, HM126 & HM130MAX
On 2020 and newer sawmills, remove the arm by first disassembling the handle.
Then slide the arm assembly out towards the throat opening in the sawmill.
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Post Sleeve Bushing Replacement
Most Sawmill Models
REMOVE GUIDE ARM—HM130
On 2019 and earlier HM130 sawmills, the aluminum guide arm needs to be removed.
Open the band wheel housing doors and remove the blade.
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Post Sleeve Bushing Replacement
Most Sawmill Models
Remove the M10 X 25 mm bolt and jam nut from the end of the guide arm and slide the guide
block holder assembly out.
Loosen the locking handle and slide the arm out the right side of the sawmill.
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Post Sleeve Bushing Replacement
Most Sawmill Models
REMOVE CARRIAGE—HM130MAX
On HM130MAX sawmills, the entire ABG carriage needs to be removed in order to gain access
to the two front bushing bolts.
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Remove the four (4) button head
screws, flat washers, spacers,
and lock nuts (located inside the
band wheel housing) and drop
the carriage down and set it
aside.

Post Sleeve Bushing Replacement
Most Sawmill Models
REMOVE OLD POST SLEEVE BUSHINGS
Follow the steps below to remove the old post sleeve bushings from the sawmill. Repeat the
steps for both sides of the mill.
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UPPER
LOWER
Use vice grips to twist and snap
the old bushing until it breaks,
then discard it.
Slide the locking plate down and
out of the way.
Remove the three (3) M8 X 20
and one (1) M8 X 35 mm hex
bolts from the bottom of the post
sleeve.
Use vice grips to twist and snap
the old bushing until it breaks,
then discard it.
Remove the four (4) M8 X 20 mm
hex bolts from the top of the post
sleeve.
Slide the locking plate up and
out of the way.

Post Sleeve Bushing Replacement
Most Sawmill Models
INSTALLATION
ASSEMBLE UPPER POST SLEEVE BUSHINGS
Follow the steps below to assemble the U-shaped post sleeve bushings to the upper face of the
post sleeve. Repeat the steps for both sides of the mill.
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Angle the front bushing
downwards and push it over the
front side of the carriage post.
The bushing will fit tightly over
the post.
Push the bushing down until it
lies flat against the post sleeve.
Push the rear bushing over the
back side of the carriage post
until it fully nests with the front
bushing.
Reinstall the locking plate and
the four (4) hex bolts—but only
start the threads. Do not tighten
the bolts until instructed.
Note: after each set of bushings
are installed, it is normal to have
to move the sawhead to get all
the bolts started in the holes.
Reinstall the tubing
bracket on the upper-
right post sleeve.

Post Sleeve Bushing Replacement
Most Sawmill Models
ASSEMBLE LOWER POST SLEEVE BUSHINGS
Follow the steps below to assemble the U-shaped post sleeve bushings to the bottom face of
the post sleeve. Repeat the steps for both sides of the mill.
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Angle the front bushing upwards
and push it over the front side of
the carriage post. The bushing
will fit tightly over the post.
Push the bushing up until it lies
flat against the post sleeve.
Push the rear bushing over the
back side of the carriage post
until it fully nests with the front
bushing.
Reinstall the locking plate and
the four (4) hex bolts—but only
start the threads. Do not tighten
the bolts until instructed.
Note: after each set of bushings
are installed, it is normal to have
to move the sawhead to get all
the bolts started in the holes.

Post Sleeve Bushing Replacement
Most Sawmill Models
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On ce t he b us hi ng s ar e
nested together and loosely
assembled to the carriage
post, ensure they are pushed
flush against the front & rear
faces of the post so there is
no gap visible on either
bushing.
The bushing “fingers” naturally
push inwards so as they wear,
continuous pressure is applied to
each side of the carriage post.
However, the front & rear wear
pads on the bushings do not self-
adjust. As a gap appears over
time due to wear, simply loosen
two (2) bolts on one side and
push the bushing towards the
post until they are flush again.
The bushing holes are slotted to
allow for this future adjustment.
No
Gap
Gap
No
Gap
Gap
HM122
HM126
HM130
HM130MAX
“Fingers”
Wear Pad
Wear Pad
“Fingers”

Post Sleeve Bushing Replacement
Most Sawmill Models
FULLY TIGHTEN HARDWARE
With the bushings properly nested together and flush with the carriage post, secure them by
fully tightening all sixteen (16) hex bolts with a socket/wrench.
Once all the bushings are fully tightened, spray the posts with a water resistant silicone lubricant
such as “WD-40 Water Resistant Silicone Spray” or “3-in-One Silicone Spray Lubricant.”
The bushing replacement is now complete. If applicable, reinstall and calibrate the adjustable
blade guide assembly as shown in the next section.
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Be sure to adjust the
sawhead depth stop jam
nut on both sides of the
sawmill when tightening
the bolts
The new bushings are
5/32 in [4 mm] thicker than
the previous style so the
bolt needs to protrude less
than it was originally. Set
these bolts so the blade is
1 in [25 mm] above the log
bunk when the head is
lowered all the way down.
UPPER
LOWER

Post Sleeve Bushing Replacement
Most Sawmill Models
ABG CALIBRATION—HM130MAX
Reverse the disassembly steps in section, REMOVE ADJUSTABLE BLADE GUIDE, to reinstall
the adjustable blade guide on the HM130MAX
When reinstalling the carriage, do not fully tighten the four (4) button head screws. Snug them
to where the carriage is not loose but not so tight that the carriage cannot pivot.
**Some components removed for clarity.**
When the guide arm has been installed, check that it slides smoothly between the V-rollers. If it
feels too loose or too tight, adjust the bottom eccentric roller using a wrench. Turning it counter-
clockwise will tighten the arm movement; turning it clockwise will loosen the movement.
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Do not fully tighten
button head screws.
Carriage will pivot
about this screw when
adjusting for level.
Counter-clockwise: tighten
arm movement
Clockwise: loosen arm
movement
Eccentric V-Roller

Post Sleeve Bushing Replacement
Most Sawmill Models
With the blade under tension, place a spirit level on the blade to check the level.
Fully extend the guide arm and set the level on top of the arm. Rotate the ABG carriage and
guide arm until it matches the blade level so both are parallel. Slide the guide arm in-and-out to
verify that the gaps between the guide blocks and the blade are uniform.
Once the ABG is properly adjusted, fully tighten the four (4) button head screws on the carriage.
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ABG will rotate about
this button head screw

!