Power Assist™ Boxes
1380 Beverage Drive, Suite W
Stone Mountain, GA 30083
1-800-426-6256 | 678-892-2323
Operation and Maintenance Guide
Better – Faster – Every time
Models: 24TT, 28TT, 33TT, PA07H, PA10H & PA12H
BETTER
FASTER
EVERY TIME
Updated 04 2012
www.tapetech.com
© 2012 TapeTech Tool Co. All Rights Reserved
Power Assist™ Boxes
1380 Beverage Drive, Suite W
Stone Mountain, GA 30083
1-800-426-6256 | 678-892-2323
Models: 24TT, 28TT, 33TT, PA07H, PA10H & PA12H
Operation and Maintenance Guide
Better – Faster – Every time
SPRING MOUNT
PRAWL or CATCH
Updated 04 2012
www.tapetech.com
© 2012 TapeTech Tool Co. All Rights Reserved
Power Assist™ Boxes
1380 Beverage Drive, Suite W
Stone Mountain, GA 30083
1-800-426-6256 | 678-892-2323
Operation and Maintenance Guide
Better – Faster – Every time
Models: 24TT, 28TT, 33TT, PA07H, PA10H & PA12H
Operation
The Power Assist™ Box applies joint compound over taped joints while
automatically dispensing joint compound with the power assist feature. It
comes in three widths, generally used for finishing as follows:
(175 mm): applies bed coat
7”
” (250 mm): applies finish coat
10
(300 mm): applies skim coat
12”
This tool requires little effort to operate and is designed to produce uniform results every time.
The Power Assist™ Box is controlled by the box handle. These handles come in multiple lengths from
34” to 72” as well as an XTender™ Handle that adjusts between 41” and 63“. The handle is attached to
the box by sliding the box onto then handle and tightening the two wing nuts.
Notice the spring arms mounted on the pressure plate of the box. These arms are connecting points
for the power assist springs. The other end of the springs is attached to the top of the radius plate by
stretching them over and onto the spring mounts. Pull the pressure plate out to the fully open
position. Note that the pressure plate will “catch” in that position and be held there. There is a “lock”
mounted on the right side of the pressure plate that holds the tool in the fill position. Fill the box with
joint compound through the opening behind the blade using the slot adapter and Loading Pump.
The finishing box wheels activate the power assist mechanism. This is done by pressing the box against
the wall in such a way that the axle is compressed and the “prawl” or “catch” releases the cog on the
pressure plate. The joint compound will not flow until this “catch” is released. As soon as the catch
releases, compound will start slowly flowing from the box. Move the box along the joint to be finished.
You will need to apply very little pressure to keep the joint compound flowing from the box. The
amount of pressure needed will vary with conditions and compound consistency. Note, if you have
trouble getting the “catch” to release, try placing the box on the wall, wheels first.
The adjustable metal blade trowels the compound with the precise crown needed. This is set using the
crown adjustment dial. This dial controls the amount of crown left by the box with #1 being the most
amount of crown (more joint compound applied) and #5 the least (less joint compound applied).
Before starting to run any joint, lock the box handle at a slight angle by squeezing the handle grip with
one hand. Your other hand should grip the handle near the box.
Near the middle of the joint, lock the handle and by gradually decreasing pressure, remove the box
from the wallboard surface with a sweeping motion. The flow of joint compound does not stop
immediately. It is suggested that you sweep the wheels off the wall about 6” (150 mm) earlier than
would normally be done to keep excess compound from flowing onto the outside of the box.
Reverse hand positions and begin again at the other end of the joint. Again move the box along until
you reach the previous stopping point. Lock the handle and remove the box from the surface with a
sweeping motion. This procedure is followed for all ceiling joints and horizontal wall joints.
Updated 04 2012
www.tapetech.com
© 2012 TapeTech Tool Co. All Rights Reserved
Power Assist™ Boxes
1380 Beverage Drive, Suite W
Stone Mountain, GA 30083
1-800-426-6256 | 678-892-2323
Models: 24TT, 28TT, 33TT, PA07H, PA10H & PA12H
Operation and Maintenance Guide
Better – Faster – Every time
Operation (continued)
To cover vertical wall joints, lock the handle and begin covering the joint from the bottom up to a height
of about 30” (.75 m), sweep off and begin again at the top of the joint. Move down the joint until you
reach the previous stopping point. Then lock the handle and sweep off the surface, neatly joining the
two finished sections.
For door or window openings, always work from the corner, moving toward the opening. Just before
the wheels reach the opening, lock the handle and lift the wheels to keep them from dropping into the
opening, then sweep away from the wall.
Before starting the finish coat, lightly sand the dried topping coat to remove any small crumbs. Fill the
10” or 12” (250-300 mm) box and set the dial to #3 for a medium crown. Apply a finish coat to all joints.
For butt joints, apply a coat on either side of the center of the joint. After the two side by side coats
have dried, finish them with a 10” or 12” (250-300mm) wide skim coat over the center of the joint.
Reset the crown dial to #5 for a tight crown then cover the flat joints on the ceilings and walls.
The pressure plate on the Power Assist™ Box CANNOT be moved inward unless the wheels are triggered
and the pressure plate “catch” is released. This applies to both running the tool and emptying unused
compound. To refill the Power Assist™ Box pull back on the handle to open the pressure plate to its
open position.
Maintenance
Remove the springs from the mounts on top of the radius plate to open the pressure plate for cleaning.
The wheels must be triggered to re-install the pressure plate into the box after cleaning.
Clean thoroughly with brush and water (or water hose) to remove all joint compound from the tool.
Then, after the tool is clean, lightly oil with Ames® Bazooka® Oil or any light machine oil.
Box Blade Replacement
1. To remove the used blade, place the tip of a screwdriver against one end of the blade and tap the screwdriver with the
palm of your hand.
2. If the blade does not pop out, tighten the screw at one end of the brass blade holder, forcing the end of the blade out.
Back the screw up and again tap the end of the blade.
3. Use one end of the used blade to clean any dried compound from the blade holder slot.
4. Remove both right and left skids, but leave the repair clips in place.
5. Slightly bend the new blade approximately 2 inches from both ends. This will help secure the blade while the tool is in use.
6. Start at one end, pressing the blade all the way into the blade holder, working to the other end. Install new skids. The
“dog ear” on the skids should press against the back side of the new blade and be flush with the blade holder (about the
thickness of a thumbnail lower than the blade edge).
Updated 04 2012
www.tapetech.com
© 2012 TapeTech Tool Co. All Rights Reserved
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