Maintenance. Powermatic PJ882, 1610079

Maintenance

Disconnect machine from power source before doing any maintenance. Failure to comply may cause serious injury.

The table and fence surfaces must be kept clean and free of rust for best results. Some users apply a thin coat of paste wax. Avoid waxes or protective sprays that contain silicone, as this can transfer to the workpiece and make it difficult for later finishes to adhere to the wood.

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 some other products.

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 oven cleaner or “gum and pitch remover” to wipe this off the knives. Use

caution when working around knives!

The bearings in the cutterhead are sealed for life and do not require lubrication.

The fence assembly should slide easily over the slide bracket. Keep the slide bracket, shown in

Figure 48, lubricated with a good quality multipurpose grease. Do not get grease on the drive belt.

Do not place heavy objects on the tables, or use the jointer as a storage table.

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 with and parallel to the outfeed table. See “Setting Knives at Correct Height and

Parallel to Outfeed Table” on page 18.

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Figure 47

(skewing the fence)

Figure 48

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. 6296046, set of 3) may be obtained from your distributor, or by calling customer service at 1-800-274-6848.

Cutterhead Repairs

The entire cutterhead assembly may be removed from the Jointer for bearing replacement or other maintenance procedures.

Use caution when working

around sharp knives.

To remove the cutterhead, proceed as follows:

1. Disconnect jointer from power source.

2. Remove fence assembly from jointer.

3. Lower both infeed and outfeed table.

4. Remove belt guard, and remove drive belt from around cutterhead pulley.

5. Remove knives from cutterhead.

6. Remove rabbeting ledge by loosening and removing the two hex cap screws and washers which secure it to the infeed table.

7. Loosen the two bolts that secure the cutterhead to the base; these are accessed through the gap below the jointer base. See

Figures 49 and 50. Place a wrench on each of the bolt heads and turn each bolt until the cutterhead is loosened.

8. Lift cutterhead straight up from base.

9. Remove pulley and both bearing housings.

IMPORTANT: If the bearings need replacement, this should be done by qualified service personnel. Bearings are press fitted and must be removed or installed with an “arbor press”.

10. To re-install cutterhead, reverse the above procedure. Before re-installing, make sure the machine's curved seats of the base casting are free of dirt, dust or grease, to help ensure a tight fit.

11. After the cutterhead has been installed, check the infeed and outfeed table settings in relationship to the cutterhead.

TIP: You may wish to keep an extra cutterhead on hand to maintain shop productivity.

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Figure 49

Figure 50