LEVER RETURN SPRING REPLACEMENT KIT
WI1498 3/06
© ALARM LOCK 2006 Publicly traded on NASDAQ Symbol: NSSC www.alarmlock.com
2. Remove the Spindle Bushing
Assembly and set aside. Remove
Locking Piece (and the small spring
attached to it).
1. With outside housing removed
from door, unscrew eight screws
and remove the Rear Cover
Plate as shown.
3. Remove Slide Plate. Remove Slide
Plate Springs.
4. Remove the 3 screws that hold
down the Plastic Cover Plate.
Spindle
Bushing
Assembly
Remove eight (8) Rear
Cover Plate screws
Locking Piece
(with small spring) Slide Plate
Slide Plate
Slide Plate Springs
Plastic Cover Plate
"C" Retainer
Ring
Rotate handle
6. With the handle turned, lift off the
Plastic Cover Plate and carefully set
aside. Note the tamper switch is
attached to the Plastic Cover Plate.
5. In order to remove the Plastic
Cover Plate, you must first turn
the handle (or insert screwdriver
to turn as shown).
7. Remove "C" Retainer Ring from
front of lock with special tool.
8. With "C" Retainer Ring removed,
the Spindle Bushing Assembly can
slide out. Remove the Lever Return
Spring.
Lever Return
Spring
Plastic Cover Plate
Rotates when
handle is turned
(Legs)
Plastic Cover Plate
Spindle Bushing
Assembly
10. (a) Place inner leg against left side
of tab. (b and c) Deflect outer leg
past tab. (d) Outer leg "springs-
back" against the tab.
9. Replace with new Lever Return
Spring in same manner as old
spring (legs must be deflected as
shown in step 10).
(a)
(b)
(c) (d)
(Tab)
(Tab)
(Leg)
(Leg)
11. Slide the Spindle Bushing As-
sembly back into place. Ensure the
spring legs engage with the central
boss.
12. With the handle turned, carefully
replace the Plastic Cover Plate.
Ensure tamper switch wires run to
the side and are out of the way.
Plastic Cover Plate
13. Release handle. Insert the 3
screws that hold down the Plastic
Cover Plate. Replace Slide Plate
Spring. Do not insert second spring.
14. Brush all moving parts with
grease. Replace Slide Plate.
15. Insert second Slide Plate Spring
into opening of Slide Plate as
shown.
16. Use small screwdriver to com-
press the spring. Be sure spring is
fully inserted into opening.
Plastic Cover Plate
Slide Plate Spring
Slide Plate
19. Replace the Spindle Bushing and
reattach the Slide Spacer (black).
Ensure the spacer and the Post
Bushing are replaced.
Locking Piece
(with small spring)
Slide Plate
17. Hold Slide Plate in place. Turn
worm gear until "white gear" centers in
the worm gear threads. As the Slide
plate moves as the worm gear turns,
ensure the two springs are equally com-
pressed.
18. Replace Locking Piece as
shown. Insert its small spring first
and push down to lock in place.
Ensure tamper switch wires do not
obstruct reassembly.
20. Insert wires through Rear Cover
Plate as shown and replace Rear
Cover Plate and secure with eight
(8) screws.
Slide Plate
Two springs
"White gear"
Worm Gear Slide Spacer Post Bushing
REPLACE THE LEVER RETURN SPRING (PART HW1221). APPLICABLE MODELS: EDTL, ETPDL, DL3500, PDL3500, DL4500, PDL4500
345 Bayview Avenue, Amityville, New York 11701 For Sales and Repairs 1-800-ALA-LOCK For Technical Service 1-800-645-9440
