SIGMA projetor - Manual (Page 44)

MAINTENANCE INSTRUCTIONS
4.13
Clean the interior of both remote control conduits by pouring 4-5 oz (100 ml) of clean solvent into one
end. Use compressed air to blow the solvent through the entire length of conduits into a clean white
cloth attached to the opposite end. Repeat this cleaning process until the solvent blown through the
conduit comes out clean. Use the compressed air to thoroughly dry the interior of the conduit.
Residual solvent left in the remote control conduit will dilute the lubrication applied to the remote
control cable diminishing the protective qualities.
Check the swage fittings to ensure the threads are not stripped and are clean. Using your hands,
attempt to twist or rotate the swage fittings off the control conduits. If any movement is possible, the
control conduit must be removed from service and new swage fittings must be installed.
10 Remove the crank arm from the control crank assembly by removing the 5/16 in hex bolt and washer.
While wearing safety glasses, carefully remove the control crank assembly from the handle or frame
by unscrewing the four bind head screws from the stop nuts.
Separate the two halves of the control crank housing.
CAUTION
Ensure the cable adapters stay in the bottom control crank housing during separation. Care should
be taken to avoid losing control of the tensioned wear strip that may fly out during separation of the
control crank housing. This is the reason why safety glasses must be worn.
Disassemble and degrease the drive wheel, wear strip, the two cable adapters, the two brake jaws,
the two halves of the control crank housing and brake bearing. The wheel bearings may be left in the
control crank housing during cleaning, but care should be taken not to lose the spacer rings that fit
between the wheel bearings and the drive wheel as applicable. Clean and inspect all parts for
damage or wear and replace as necessary.
If applicable, remove the reset knob of the odometer by loosening the two Allen set screws, then
remove the odometer cover by removing the two bind head screws that fasten it to the mounting
plate. Do not disassemble the odometer.
Clean the helical gear of the odometer with solvent using a brush to dislodge any material between
the gear teeth. Check the odometer for proper operation: turning the gear should turn the odometer
but the odometer shaft should still be able to turn when the gear is held fixed (for zeroing the
odometer).
Clean the drive wheel in solvent using a brush to dislodge any dirt between gear teeth. Inspect the
drive wheel's gear teeth looking for broken or bent teeth. If the drive wheel has broken or bent teeth,
use a file to grind the tooth flush with the drive wheel. Up to three consecutive teeth can be missing
from the drive wheel before a replacement is required.
Light rust may be removed from the wear strip using fine sandpaper and machine oil.
Lightly grease the drive wheel hub, wheel bearings and the wear strip before reassembling.
Place one of the cable adapters in the lower control crank housing. Place one end of the wear strip
against the cable adapter then fit the rest in the track of the housing. Fit the other cable adapter in
place to retain the wear strip.