HEHR INTERNATIONAL INC
PRODUCT FIELD SERVICE MANUAL
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WINDOW LATCH REPLACEMENT (EMERGENCY EXIT WINDOWS)
FLIP LATCH REPLACEMENT:
Each exit latch is
attached to the latch bracket using two 1/4 inch screws. Remove both screws with a suitable Phillips
head screwdriver. Discard the defective latch. Place the new latch into
position and align the holes of the latch and bracket. Note that the latch
holes are slotted to permit adjustment of the latch tension. Try to maximize
the tightness of closure by placing the latch as far inbound as possible.
Secure the new latch with the screws provided. Check for ease of opening and
-39 OR –42 BOTTOM OR SIDE
Each exit latch
is attached to the window frame using two small screws and nuts. Remove these with a Phillips head
screwdriver and a small wrench. Discard the defective latch. Some windows
include a metal stiffener bracket on the back of the latch and frame. These
must be reused with the new latches. Place the new latch into position and
align the holes of the latch, frame and stiffener. Secure the new latch with
the screws provided. Check for ease of opening and secure closure.
-34 STYLE SIDE LATCH
REPLACEMENT (FOR SMALL BUSES):
recommended that a special field replacement kit be used for this work. LATCH
REPLACEMENT: Release the latches and open the exit section. Using a Phillips
head screwdriver, remove the screws holding the latch to the exit frame.
Replace the old latch with a new one from the kit. Using a hex driver, place a
new keps nut on the back of each screw and tighten securely. Close the exit
window and check for proper operation. CATCH REPLACEMENT: Unlatch and open the
emergency exit window. The latches engage with catches on the backframe, which
are held in place with two rivets each. Using a .128” power drill, remove these
rivet heads. Using a 7/64” diameter punch, carefully remove the rivet body and
the catch. IF THE WINDOW HAS NO STIFFENER, GO TO “NO STIFFENER”, BELOW. Place
the new catch on the stiffener and align the holes. Rivet into place with the
long silver color rivets in the kit.
Close the egress window, close the latches, and verify proper
NO STIFFENER: Discard any spacer that may be present. Place
new catch and stiffener on backframe, align holes, and rivet into place with
the long silver color rivets provided. Center punch and drill .128” holes 1.5
inches above and below the existing rivets. Secure with the short black rivets
provided. Drill two holes through the
backframe and the other leg of the stiffener, at the height of the first holes.
Secure this leg with the short black rivets. Close the egress window, close the
latches, and verify proper operation.
-38 STYLE CABLE RELEASE
SIDE EXIT LATCH REPLACEMENT:
CABLE REPLACEMENT: Open the window. Remove the cable grommet
from the latch lever with a suitable Phillips head screwdriver. Remove the
cable from the spring loaded bolt latches at the bottom of the exit
window. Attach the new cable grommet
with the screw provided. Close the
latch lever. Feed the cable around the
lower corner of the window, around the spring-loaded latch bolt and through the
hole in the bolt. If there is a
second catch, feed the cable through
the small triangular hole between the frame and the catch, and on to the other
latch bolt. At the last latch bolt,
loop the cable as previously, crimp the cable to hold it in place, and cut off
any excess. DURING THIS PROCESS, THE
LATCH BOLTS MUST BE IN THE RESTING POSITION (i.e. NO TENSION AGAINST THE
SPRINGS) AND THE EMERGENCY LATCH LEVER
HANDLE IN THE CLOSED POSITION IN THE
EMERGENCY HANDLE REPLACEMENT: Using a suitable power drill
bit, remove the rivet head holding the latch lever in place. Knock out the
rivet body with a suitable punch or nail. Retain the spacer bushing which the
rivet passes through. With the latch
lever loose, unscrew the grommet from the lever. Screw the cable grommet onto
the new latch lever. Hold the latch lever into place and slide the bushing
through it and the frame to hold it in place. Secure the latch lever and
bushing with a .187 diameter pop rivet with a grip range from 1/8 to ¼ inch.
Open and relatch the exit window to check for smooth operation.
-31/-32 BOTTOM EXIT LATCH
REPLACEMENT (FOR TORQUE WINDOWS):
Open the exit window. Using a suitable screwdriver, remove
the screw holding the latch assembly together.
Unless you are replacing all parts in the assembly, keep all parts other
than the broken latch. Put the new latch assembly together in this sequence
(outside to inside) 1-round head nut, 2-flat washer, 3-through the hole in the
frame, 4-plastic stop spacer, 5-wave washer, 6-new latch (be sure it’s the
correct one), 7-screw. Re-tighten the screw.
If necessary, replace the latch on the other side of the window. Test latch action by closing and latching
and reopening the window.
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