GMC 1976 ZEO 6083 Maintenance Manual page 29

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BODY
IMPORTANT:
To avoid damaging screen track or
vent track, DO NOT remove screen before
removing screen track, or vent glass before
removing vent track.
If screen or window does not slide easily in track,
spray track grooves with Silicone Spray Lubricant,
GM Part No . 150018 or equivalent .
VERICAL SLIDING WINDOW (OPTIONAL)
The entrance door at the galley windows may be
equipped with optional "Hehr" vertical sliding win-
dows as shown in Figure 19 . This window is serviced
in the same manner as the horizontal sliding win-
dows, except, the tracks, vent glass, and screen are
mounted vertically rather than horizontally . An op-
erator (spring and pulley tension device) is used to
retain window at desired open position . To service
glass or screen, it is not necessary to remove nylon
cord, cord tension guides, or operator .
The operator assembly is secured to the window
sash by the attaching screw shown in Figure 20 . A
nylon cord travels around the five operator assembly
pulleys, behind the cord tension guides, and is then
secured to a small hook on the window glass. Should
nylon cord require replacement, procure locally.
Removal
1 . Remove screw securing hook to window glass.
2. Remove screws securing cord tension guides to
window sash .
3. Remove screw attaching operator to window
sash .
4. Remove nylon cord from hook and operator
assembly .
Figure 20-Operator Assembly
Installation
1 . String nylon cord from knotted hole around
each consecutive pulley . Cord should travel under
and over pulleys one and three, but over and under
pulleys two and four, and under pulley five . Refer to
Figure 20.
2. Secure operator to window sash with attaching
screw .
3. Install cord tension guides into sash assembly .
Be sure nylon cord is behind positioned behind the
guides .
4. Secure nylon cord to hook and attach hook to
glass with screw.
Figure 21-"Hehr' Latch in Open Position