HEHR
INTERNATIONAL INC
PRODUCT FIELD SERVICE MANUAL
ANALYZING HARD OPERATION IN TORK, CRANK-OUT, or AWNING TYPE WINDOWS:
All of the following should be investigated before ordering a replacement window:
(1) Knob stripped: The simplest reason that a torque window will not operate is that the knob is stripped. If the knob turns , but the window does not open, remove the screw holding the knob to the operator shaft. Pull the knob off and try to rotate the shaft while holding it with pliers. BE CAREFUL NOT TO DAMAGE THE SHAFT. If the window opens, order a replacement operator knob.
(2) Vent
binding: If the knob and operator appear to be turning properly, but the
vent will not open, it is possible that the vent pane is catching the frame
at one side. Check this by having a helper outside the vehicle observe
as you turn the knob. Have your helper
assist to free the side that sticks.
If it pops free and the window opens, there are a few simple fixes to try:
A-
Check for caulk or other materials, which can be removed to permit greater clearance.
B-
Check to determine whether the vent is centered in its opening. If not, GENTLY tap it to the center using a wooden block and a mallet.
C- If these solutions do not fix the problem, the window may have been improperly installed. Check this by removing the window from the wall and operate in the non-installed mode. If the window works properly, the window was installed while racked or twisted. Reinstall the window with the vents closed, but not tight. Generally, the window will be flatter in this mode than when closed really tight. If this technique is not successful, the window will probably have to be replaced.
(3) Defective operator: After several years, the gear mechanism inside the operator may wear out. If the operator shaft turns, but the torque tube does not, the operator must be replaced. For instructions on operator replacement, go HERE.
(4) Linkage problems: There are several places where interference or other problems can occur with the linkage mechanism. Check for:
A- All connections secure (no E-rings missing, no rivets broken)
B- Torque tube intact (not broken or bent)
C-
Interference
(Inadequate clearance between moving parts)