C
HAPTER
3. M
AINTENANCE
P
ROCEDURES
3-85
02.9631.0010
CONFIDENTIAL
15 Jan 98
3.3.7
Yoke Removal and Replacement
Parts:
1 EA
ASSY, VL2 YOKE
(22.9620.0064)
Tools:
Screwdriver, Phillips #1
Screwdriver, Phillips #2
Screwdriver, Standard Flat
Wrench, Allen, 7/64 inch, T-handle
Wrench, Allen, 5/32 inch
Nut driver, 5/16 inch
Diagonal cutters
Loctite 242
Tie wraps, medium
Tape
Permanent black marker
Hook and pick tool
Spacers, two, 0.06 inch(or two medium size tie wraps)
Note: This is a lengthy and involved procedure. Do not attempt if you are
not comfortable with maintenance procedures for this luminaire.
To remove and replace yoke assembly:
Step 1.
Remove both head covers and electronics chassis lid screws.
Remove head assemblies. Remove CFB, BFB, GBP, lamp lamp
socket assembly, reflector asembly, cable side and pulley side
inner siderails and tilt cover. Refer to Yoke Cable Assembly
Removal and Replacement procedure.
Step 2.
Remove iris baffle. Remove front aperture plate and rear door
and cover assembly.
Step 3.
Loosen tilt belt tension and remove tilt pulley. Refer to Tilt/Pan
Mechanism Maintenance.
Step 4.
Remove outer side rail from tilt side of yoke.
Step 5.
Using 5/16 inch nut driver, disconnect ground wire from cable
side outer side rail. Refer to Yoke Cable Assembly Removal
and Replacement procedure.
Step 6.
Using flat screwdriver, remove retaining ring from cable side
yoke flange.
Step 7.
Remove cable side outer side rail from yoke.
Step 8.
Open electronics chassis lid.
Step 9.
Remove fan housing. Refer to Yoke Cable Assembly Removal
and Replacement procedure.