Installation Guide
Arrow Lock Guard – 3500 Series 
Installation Instructions 
IMPORTANT ! 
After installing the mailboxes, contact your local postmaster – the 
USPS will provide and install its own master lock on your mailbox 
unit. Hardware for installing the master lock is included in the 
plastic bag. Please provide the hardware and these instructions to 
the USPS representative when they arrive to install the lock. 
BOTTOM 
TAB 
Step 3
LOCK 
GUARD
LOCK 
BRACKET 
Step 3
FRAME
Long 
Screws 
Step 5
Step 6
Short 
Screws 
Step 8
LARGE 
HOLE in 
LOCK 
BRACKET 
Step 4
BOTTOM 
TAB 
Step 3
LOCK 
GUARD
LOCK 
BRACKET 
Step 3
FRAME
Long 
Screws 
Step 5
Step 6
Short 
Screws 
Step 8
LARGE 
HOLE in 
LOCK 
BRACKET 
Step 4
SALSBURY INDUSTRIES 
1010 East 62
nd
 Street, Los Angeles, CA 90001-1598 
Phone: 1-800-624-5269 Int’l Phone: 323-846-6700 
Fax: 1-800-624-5299 Int’l Fax: 323-846-6800 
  Copyright © 2010 Salsbury Industries. All rights reserved. (Rev. 03, 7/28/2010) 
INSTRUCTIONS FOR THE USPS REPRESENTATIVE: 
1.)  Unlock and open the door marked ‘U.S. MAIL’, and pull the top 
frame forward, exposing all of the mailboxes. 
2.)  Remove the Key from the Arrow Lock so the lock’s bolt is 
extended. 
3.)  Rest the Arrow Lock on the pre-installed Lock Bracket 
BOTTOM TAB with the bolt facing up and the keyway facing 
outward (see sketch at right and Photo #3). 
4.)  Insert the key through the large hole in the Lock Bracket and 
into the Arrow Lock, and then turn the key so the bolt retracts. 
Now push the lock into place under the Top Tab of the Lock 
Bracket (see Photo #4). 
5.)  Insert the two long screws through the Lock Bracket holes and 
through the holes in the Arrow Lock (see sketch). Do not 
attach the nuts yet. 
6.)  Place the Lock Guard (Photo #6) over the Arrow Lock so the 
long screws are thought its holes, and the Lock Guard rests on 
TOP of the frame (as shown in sketch). 
7.)  Attach the Lock Nuts to the long screws and tighten using a 
Phillips screwdriver and an open-end or socket wrench. 
8.)  Screw the short Self-tapping Screws through the Lock Guard 
and the holes in the frame. 
9.)  Push the frame closed. 
10.)  Turn and remove the Arrow Lock Key, locking the unit. Close 
and lock the ‘U.S. MAIL’ door. 
 PHOTO #3 
Arrow 
Lock Key
Arrow 
Lock Key
PHOTO #4
To
p
 Tab
Retracted bolt
PHOTO #6 


