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Pelco Manual C373SM-A (8/01) 7
MAINTENANCE
Inspect the pan/tilt unit every six months to ensure trouble-free operation and an extended
product life. Harsh environments and/or continuous motion applications may require more
frequent maintenance.
Please read all of the instructions that follow before servicing the pan/tilt.
To begin, remove the three screws on the front of the pan/tilt housing and lift the cover to
gain access to the pan and tilt motor assemblies.
TIGHTENING DRIVE CHAINS
Check the pan and tilt drive chains for tension. A movement of 1/32 of an inch to 3/32 of an
inch in the chains is acceptable. If the movement of a chain exceeds 3/32 of an inch, adjust
the chain as follows:
1. Loosen the screws securing the motor to the mounting frame.
2. Pry on the motor to apply tension to the chain. Do not over-tension the drive chain.
3. Keep tension on the chain while tightening the screws.
CHAIN DRIVE LUBRICATION
Sprockets, chains, and gears should be well greased. If necessary, lubricate the pan and tilt
gears, sprockets, and chains as follows with a high-quality grease capable of withstanding
temperatures from -50° to 170°F (-46° to 77°C). Do the following:
1. Liberally apply grease to the pan and tilt gears, chains, and sprockets (refer to Figure 1).
2. Operate the pan and tilt motors to spread the grease across the parts.
3. Apply additional grease if necessary.
4. Reinstall the cover. If the pan/tilt is installed outdoors in an inverted position, apply
RTV silicone sealant as shown in Figure 2 (except PT1250EX/AMS and PT1260EX
Series).
Figure 1. Servicing the Pan/Tilt