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22
Maintenance
Disconnect machine from
power source before doing any maintenance.
The table and fence surfaces must be kept
clean and free of rust for best results. Some
users prefer a paste wax coating. Another option
is talcum powder applied with a blackboard
eraser rubbed in vigorously once a week; this
will fill casting pores and form a moisture barrier.
This method provides a table top that is slick
and allows rust rings to be easily wiped from the
surface. Important also is the fact that talcum
powder will not stain wood or mar finishes as
wax pickup does.
The fence assembly should slide easily over the
fence support. Keep fence support greased.
The bearings in the cutterhead are sealed and
do not require lubrication.
Gum and pitch which collect on the knives
cause excessive friction as the work continues,
resulting in overheating of the knives, less
efficient cutting, and consequent reduction in the
life of the knives. Use an oven cleaner or gum
and pitch remover to wipe this off the knives.
Sharpening Knives
Knives should be kept sharp. This will contribute
to better stock finish, longer machine life, and
safer operation.
A jointer knife hone provides a simple way to
sharpen knives. Hones are available from many
woodworking supply stores. Carefully read any
instructions that accompany the hone.
Use caution and proceed
slowly when sharpening knives. Disconnect
jointer from power source, and wear
approved eye protection.
When finished sharpening knives, they should
be re-set level to the outfeed table. See
“Installing Knives” on page 13.
Knives can usually be whetted several times in
the cutterhead before having to be removed and
re-ground.
TIP: If the jointer is used frequently, keeping a
spare set of knives on hand is recommended.
Extra knives (stock no. 6427002, set of 3) may
be obtained from your Powermatic distributor, or
by calling WMH Tool Group at 1-800-274-6848.
Cutterhead Repairs
The entire cutterhead assembly may be
removed for bearing replacement or other
maintenance procedures.
1. Disconnect jointer from power source.
2. Remove fence assembly from jointer (see
page 12, Figure 13).
3. Loosen motor mounting and push up on
motor to create slack in belt (see page 9)
4. Remove drive belt from cutterhead pulley.
5. Lower both infeed and outfeed tables.
6. Loosen the two socket head cap screws on
the fence support and pivot the fence
support out of the way (Figure 34).
Figure 34
7. Remove rabbeting ledge by loosening the
two hex cap screws and washers (A, Figure
35).
Figure 35
8. Loosen the two bolts (B, Figure 35) that
secure the cutterhead to the bed – these are
accessed from the underside of the bearing
blocks.
9. Lift cutterhead straight up from base.
10. Remove pulley and both bearing housings.