C
HAPTER
3. M
AINTENANCE
P
ROCEDURES
3-77
02.9631.0010
CONFIDENTIAL
15 Jan 98
3.3.5.4
Pan Mechanism Belt Removal and Replacement
Parts:
1 EA
BELT, PAN, VL2B, 1/5P, 95T, .375W, KEVLAR
(53.6503.0001)
Tools:
Screwdriver, Phillips #1
Screwdriver, Phillips #2
Wrench, Allen, 7/64 inch, T-handle
Wrench, Allen, 5/32 inch
Spacers, two, 0.06 inch (or two medium size tie wraps)
Loctite 242
To remove and replace pan mechanism (Figure 3-22):
Step 1.
Remove power to luminaire.
Step 2.
Open chassis lid and remove fan cover.
a. At electronic chassis, remove six 10-32x3/8"PPB screws
that secure lid to chassis and open lid.
b. At fan housing, remove 14, 4-40x5/16"PFZ screws that
secure fan cover to pan/fan housing and remove fan cover.
Step 3.
Remove pan mechanism from luminaire.
a. At pan mechanism, remove one 10-32x7/8"PPB screw and
black #10 flat washer from floating-nut plate.
b. Remove three 10-32x1-1/2"PPB screws, #10 flat washers,
and 10-32 KEPS nuts that secure legs of pan mechanism to
lid of upper enclosure (screws are threaded into chassis lid).
c. Free belt from pan mechanism and remove pan mechanism
from pan/fan housing.
Step 4.
Remove belt from luminaire electronics chassis.
a. Unplug yoke cables from motherboard, lamp wires from
APS and disconnect ground wire. Remove by pulling all
through Pan/Fan housing.
b. Using 5/32 inch Allen wrench, loosen setscrew in pan shaft
collar and remove pan shaft collar from yoke pan tube.
c. Using 7/64 inch T-handle Allen wrench, loosen four 4-
40x7/16"SCB screws on pan driven pulley. Use hole in
pan/fan housing to reach screws (turn yoke as necessary).
d. Slide out yoke from bearing in chassis lid and remove belt.
