Bobrick B-3942 / B-3944 / B-3947 / B-3949 / B-3974 Instructions

INSTALLATION INSTRUCTIONS

AUTOMATIC UNIVERSAL ROLL TOWEL DISPENSER RETROFIT

The following are instructions for retrofitting Bobrick's Convertible Automatic, Universal Roll Paper Towel Dispenser Module 3974-250
into a ClassicSeries® Paper Towel Dispenser/Waste Receptacle (B-3944/B-3900) produced prior to July 2006 and similar models from
other manufacturers.

CAUTION: Be sure to use proper safety gear.

• Drill

• Drill bits 5/64 (used to make pilot holes), 11/64 (used to drill out welds)

• 7/8 step bit (used to make a large opening when AC adapter is used)

• .06" diameter nail or smaller (used to push hinge pin out)
HARDWARE PROVIDED • 7 each #6 x ½" sheet metal wide washer screws

The Cabinet is to be prepared for accepting the 3974-250 Roll Towel Dispenser by removing all components from the upper cabinet
including welded parts to provide a clear area for installing the Dispenser into the cabinet. Instructions for the B-3944 are given in detail
for reference.

1. Open towel cabinet door.

2. Remove nuts holding
door check chain/
cable. (If equipped).

Door Check Chain/Cable

3. Remove plastic or
metal towel guide
tray. (If equipped).

RECOMMENDED TOOLS

• Center Punch (used to keep drill bit from walking when drilling)

• Hacksaw or Dremel with cutting wheel (used to cut door check stud)

• Hammer and Chisel or Molding Claw Bar (to pry welds that are not fully

drilled out)

• File (to smooth the surface after removal of components)

RETROFIT PROCEDURES

Option 2

b. Leave unit in the wall.

Drilling standing up is more
ergonomic

Pros Cons

Requires drilling at angles

Requires the usage of a
center punch

Chance of drilling through
back wall when drilling out
welds

Towel Guide

4. Remove hinge pin and take off the door.

5. Cut off door check stud,
located inside top right of
cabinet. (If equipped).

Door Check Stud

Important Note: There are two options when performing the
following retrofit procedures.

Option 1

a. Remove unit from the wall.

Pros Cons

Easy to drill out welds May not be practical if wall

will be damaged due to

removal
No center punch required
No chance of drilling through

a wall behind the cabinet
Allows installer to use

other installation methods for
module

6. Remove unit from wall. (If this is the option you selected)

7. Drill out welds.
Welds are quicker to drill out when the unit is removed

versus installed in the wall.

• Drill out all the towel tray
and guide welds.

Towel Tray and Guide

• Drill out all the hinge half welds.

Hinge Half

• Drill out all the door stop welds.

Door Stop

• Drill out all the spring guide brackets welds. (If model has
any)

Spring Guide Brackets

• Drill out all lock angle welds. (If model has any)

Lock Angle

• Drill out all bracket welds. (If model has any)

Bracket

12. Use template to mark module
pilot holes and drill.

Option 1

• Use Module screw locations
as a template and mark 7 screw
locations on cabinet.

• Requires you to hold the
module inside cabinet as holes

Module Keyhole Slot

are marked.

• Use center of rectangular section of keyhole slots in
module to mark 7 screw locations if using module inside
cabinet to mark module mounting pilot holes

Option 2

• Use a paper or cardboard template mark 7 screw
locations.

• Requires proper adhering of template to be sure module
lines up correctly.

13. Install one washer screw in the top center of the module to
hold in place.

14. Install the remainder washer screws.

• The two screws that are on the sides, towards the bottom
of the module will be screwed in at an angle and will
remain that way when tightened.

8. Pry out and remove the towel tray and guide, hinge half
and door stop.

Hinge Half

Towel Tray and Guide

Lock Angle

9. File rough, sharp or uneven surfaces where drilling and
cutting was performed.

10. If using an AC Adapter (order part no. 3974-57) with
module, use template to mark hole location on cabinet and
drill a 7/8" hole for AC Adapter “lead wire” and file sharp
edges afterwards.

• AC Adapter hole may also be made anywhere in cabinet
to make electrical connection more convenient.

Side Towards Bottom

Screws at an Angle

Module

• On cabinets deeper than 4", using provided template, new
holes can be made on the module closer to the front door
to make it easier to install the module and will allow the
lower screw heads to sit flush against the cabinet surface.

15. Completed Automatic Universal Roll Paper Towel retrofit
unit.

11. Install cabinet back into the wall.
Important Note: There are two options when performing the

following retrofit procedure.

In the U.S.A.: BOBRICK WASHROOM EQUIPMENT, INC.

Los Angeles: 6901 Tujunga Avenue, North Hollywood, California; 91605-6213 Tel: [phone], Fax: [phone]
New York: 200 Commerce Drive, Clifton Park, New York 12065-1350; Tel: [phone], Fax: [phone]

or email: [e-mail]

In Canada: BOBRICK WASHROOM EQUIPMENT COMPANY

© 2017 by Bobrick Washroom Equipment, Inc.

Form No. 3974-250-169 Issued 12/8/17 Printed in U.S.A.

45 Rolark Drive, Scarborough, Ontario M1R 3B1 • Eastern Canada: Tel: [phone], Fax: [phone];
Western Canada: Tel: [phone], Fax: [phone]

or email: [e-mail]