Yale MORTISE 8800 SERIES - Manual (Page 53)

August 2004
INSTALLATION INSTRUCTIONS
Page 53 8800 Series Parts & Service Manual
RAMPED SPINDLE ASSEMBLY 12) VISUAL OCCUPANCY INDICATOR
Installation Trouble Shooting Tips
Problem Possible Cause Solution
Difficult to operate lock
by lever or by key.
Loose (Trim H.M. Doors)
(Vibration caused by normal
operation of door opening and
closing can loosen attaching
screws)
Adjust and tighten - as necessary. If
screws continually loosen up, use a
screw locking compound (such as
Loctite) on all attaching screws.
Door is warped or sagging,
binding up latch bolt in strike
cutout.
Check to see where latch is hanging up
in strike. If door is sagging, tightening top
hinge screws may solve problem. Hole in
strike plate mave have to be filed to
relieve bind. Doors can warp when
weather changes:
warm inside - cold outside
cool inside - hot outside
(Exterior doors painted in a dark color are
particularly susceptible to warpage when
exposed to direct sunlight.) It may take a
few seasonal changes to work out all
binding problems.
Loose Trim (wood
doors)
Wood doors after being
installed will sometimes shrink
slightly as the building dries out.
Tighten all screws as needed
Latch bolt hangs up in
lock body
Foreign object in lock body
(metal shavings, saw dust,
wood particles, mineral ore etc.) Remove lock from door and remove
foreign object from body. *Lubricate if
necessary.
Lock body lacks lubrication or
lubrication has gummed up
with age.
Use penetrating or solvent type lubricant
as a cleaning agent to loosen frozen or
sticking components. Lubricate with
silicon base or Lithium Grease.
Cylinder jams up
Dirt or other foreign object may
be in keyway affecting operation.
Lubricate cylinder with graphite or other
non-oily lubricant (such as Lock-EZE) Do
not use oil based lubricants in Keyway.
* Please note: Disassembling lock body will void warranty.