Pancake Brush P/N SAO0307
12” Bristle Replacement Instructions
Updated: 9/10/12
Page 9 of 15
The configuration of the 12” brush (0.021 Dia
Bristles) for the TruckMaster and DuctMaster
1.5” vacuum hose and Motor has been changed
to a Shorter, “Pancake” hub that allows it to
negotiate sharp turns in smaller air ducts than
the previous type hub. This 12” Brush directly
replaces the original 12” Brush asm.
The 2” Vacuum Hose and motor still use the 18”
brush with 0.032” dia Bristles in the traditional,
longer hub.
This 12” Brush will work on the 2” hose.
While the 18” Brush will fit on the 1.5” hose,
there are some situations where the 18” brush may not start properly (Due to the brush being held
HIGHER by the 2” hose, so the thicker bristles are easier for the motor to turn it).
Description
P/N
Quantity
Hub, Pancake-Style, Top
SAO0287
1
Hub, Pancake-Style Cover (Bottom)
SAO0288
1
Screws, 6-32 x 3/8” L Flat Head Phillips SS
NBS0045
3
Set Screw, 8-32 x ½”
NBS0152
1
Bristle bundle, 12” Long, 0.021” dia, Level
SAO0306
.03 Hank (.3 to .4 oz)
Bristle Replacement set (3 Bundles)
SAO0310
3
Bristles, Master Hank
CB0001
1 Hank
Shrink Tubing, ¼”
SHOP0011 1.4 Inch (0.12 Ft)
Rubber Band (#19)
COM0328
1
Allen Key (Wrench) 5/64” L Shape
Not Included
Instructions to Change Bristles
COM0327
1
The new Pancake Brush hub bristles are replaceable, but the process is different and the
replacement bristles are pre-assembled into 3 bundles that are retained with ¼” shrink tubing that is
bent to match the shape of the grooves in the Pancake Hub.
Each of these bundles should weigh between 0.3 ounces and 0.4 ounces and contain between 115
and 124 individual bristles that are 0.021” diameter by 12 inches long. The Bristles will be slipped
into a piece of ¼” heat-shrink Tubing (Before it is heated) P/N SHOP0011.
