INDIVIDUAL DOG REPAIR AND REPLACEMENT

WHILE AN INDIVIDUAL DOG IS LESS COMPLEX THAN THE DOGGING MECHANISM ON A QUICK ACTING CLOSURE, ANY INDICATION THAT THE DOG IS NOT FUNCTIONING PROPERLY WILL MOST LIKELY REQUIRE A COMPLETE INSPECTION, DISASSEMBLY AND REPAIR.

1. REMOVE THE SELF-LOCKING NUT OR TWO JAM NUTS AND THE DOG HANDLE FROM THE OUTSIDE OF THE DOOR.
   
   
2. REMOVE THE STRAIGHT BUSHING AND COMPRESSION SPRING FROM THE SPINDLE SLEEVE.
   
   
3. USE AN ALLEN WRENCH TO LOOSEN THE SETSCREW ON THE FLANGED BUSHING AND REMOVE THE FLANGED BUSHING FROM THE SPINDLE SLEEVE.
   
   
4. FOR STEEL DOORS, SCRAPE THE RUST, PAINT AND OLD GREASE FROM THE SPINDLE SLEEVE.  (A ROTARY STAINLESS STEEL WIRE BRUSH CHUCKED IN A POWER DRILL DOES THIS WELL.  SO DOES #320 GRIT ALUMINUM OXIDE CLOTH.)
   
   
5. USING A RAG AND SOLVENT, BE SURE TO REMOVE ALL TRACES OF PACKING AND ANY GRIT LEFT FROM THE CLEANING PROCESS.
   
   
6. CLEAN THE SET SCREW HOLE IN THE SPINDLE SLEEVE (USING A 12-28-3 UNF TAP IF NECESSARY) AND COAT THE INSIDE OF THE SLEEVE WITH A THIN LAYER OF SILICONE COMPOUND.
   
   
7. INSPECT THE BUSHINGS FOR WEAR TO DETERMINE IF THEY NEED TO BE REPLACED.
   
   
8. CLEAN THE DOG SHAFT WITH SOLVENT AND #320 GRIT ALUMINUM OXIDE CLOTH.
   
   
9. REMOVE THE PACKING PLUNGER.  IF THE THREAD ON THE SPINDLE IS DAMAGED, RETAP IT WITH A 5/16-24-3 UNF TAP.   REMOVE ANY CHIPS OR DIRT IN THE SCREW HOLE.
   
   
10. IF THE CLOSURE USES TRADITIONAL BEARINGS YOU MUST REPLACE THE PACKING PLUNGER WITH A NEW ONE IF THE OLD ONE IS BADLY WORN OR DAMAGED.  IF THE CLOSURE USES SELF-LUBRICATING BEARINGS, IT IS NOT NECESSARY TO REPLACE THE PACKING PLUNGER.
    
    

1. WHEN INSTALLING NEW SELF-LUBRICATED BUSHINGS, INSTALL THE PLASTIC PLUG IN THE PARTS KIT INTO THE HOLE IN THE DOG SHAFT.
   
   
2. SCRIBE A LINE ON THE FACE OF THE FLANGED BUSHING TO INDICATE THE LOCATION OF THE SET SCREW HOLE.
   
   
3. DAUB THE FLANGED BUSHING WITH A THIN COATING OF SILICONE COMPOUND AND INSERT IT INTO THE SPINDLE SLEEVE FROM THE INSIDE OF THE DOOR.  ALIGN THE SET SCREW HOLE WITH THE HOLE IN THE DOOR SLEEVE.
   
   
4. COAT THE SET SCREW WITH ANTI-SEIZE COMPOUND, INSERT IT AND LOCK THE BUSHING IN PLACE.
   
   
5. COAT THE DOG SHAFT WITH SILICONE COMPOUND AND INSERT IT INTO THE SPINDLE SLEEVE.
   
   
6. SLIP A COMPRESSION SPRING ONTO THE SPINDLE FROM THE FRONT SIDE OF THE DOOR.  (WITH TRADITIONAL BEARINGS, USE ONLY PHOSPHOR BRONZE SPRINGS.  WITH SELF-LUBRICATING BEARINGS, USE ONLY STAINLESS STEEL SPRINGS.
   
   
7. IF THE CLOSURE USES TRADITIONAL BEARINGS, WRAP 6" STRING PACKING AROUND THE SPINDLE BETWEEN THE SPRING COILS.
   
   
8. COAT THE STRAIGHT BUSHING WITH SILICONE COMPOUND AND INSTALL IT FROM THE FRONT SIDE OF THE DOOR.  MAKE SURE IT SLIDES SMOOTHLY UNDER SPRING TENSION.
   
   
9. INSTALL THE DOG HANDLE AND MOUNT ONE JAM NUT OR SELF-LOCKING NUT LIGHTLY, LETTING IT TAKE ONLY 3 THREAD TURNS.
   
   
10. WHEN ALL DOGGING ASSEMBLIES ARE IN PLACE, ADJUST THE DOGS.
    
    
11. PERFORM A CHALK TEST.
    
    
12. ON CLOSURES THAT USE JAM NUTS, INSTALL THE SECOND JAM NUT ON EACH CLOSURE.