HEHR INTERNATIONAL INC

PRODUCT FIELD SERVICE MANUAL

 Return to Service Manual

 

WINDOW LATCH REPLACEMENT (EMERGENCY EXIT WINDOWS)

 

4700/4900 STYLE                           

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 secure closure.

 

-39 OR –42 BOTTOM OR SIDE         

LATCH REPLACEMENT:

 

 

 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):

 It is 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 operation. 

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 FRAME.

 

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.                           

 

 Return to Service Manual