HEHR INTERNATIONAL INC

PRODUCT FIELD SERVICE MANUAL

 

How to quiet squeaks 

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In order to meet Federal glass retention requirements in bus windows, some series are constructed using metal glass clips on the straight sides of stationary panes, with flexible vinyl in the radius corners.

 

Over time, and with particularly flexible bus bodies, the interface between the metal clips and outside face of the glass may develop a squeak.  The repair for this problem is to install a sound damper under the glass clips.

 

Caution: Complete the work on each clip before removing another.

 

Removing the clip: Carefully tap a stiff putty knife between the frame and the glass clip, using a mallet.  Rotate the putty knife blade toward the center of the window, and work the full length of the glass clip free.  Avoid bending the glass clip in process of removal.

Install the damper: Cut a piece of 3/16ths" X 5/16ths" foam tape (available from most glass shops) to the length of the glass clip.  Using a mild cleaning solution, clean the back of the glass clip and dry it.  Peeling the backer paper off the tape, roll it onto the back of the glass clip, set slightly back from the clip edge so that it does not show when the clip is re-installed. 

Install the clip: Position the metal clip on the glass, next to its original location.  Tap the clip back into place with a suitable non-marring (wood or plastic) block and the mallet.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HEHR INTERNATIONAL INC

PRODUCT FIELD SERVICE MANUAL

 

WINDOW LATCH REPLACEMENT (EMERGENCY EXIT WINDOWS) (continued)

 

-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 secondcatch, 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 (ie 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 ľ 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 itís 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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