Polychem GP44, Operation And Maintenance Manual

Page: 32 / 105

GP44 Semi-Automatic Strapping Machine
OPERATION - 32-
GENERAL MAINTENANCE (CONT.)
Run the machine. Listen for any noises not normally associated with the machine. Look to see that all
illuminated switches and lights are operational. Test the safety circuits by sliding the doors open and lifting
the conveyors. The machine should stop immediately. If it does not, or one of the circuits has been disabled,
contact a supervisor.
PERIODIC MAINTENANCE, TEARDOWN, AND CLEANING (Every 150,000 to 250,000 cycles):
The air cylinders, valves and guide bearings are the latest lubricated for life design.
Because of this there is no lubricator to fill. The dust and dirt should still be wiped off the shafts and slides
occasionally.
The grippers should be removed from the machine, cleaned, and lightly coated with a lubricant similar to
white lithium grease. (Do not use heavy fibrous style grease)
While the grippers are out, clean the casting that the grippers fit into. Also clean the cam surfaces that the
gripper bearings ride one. Coat both the casting slides and cam surfaces with this same grease. Rotate the
gripper bearings to feel for rough spots (replace bearings if roughness is found).
Reassemble the grippers and test to make sure they can move up and down freely with no binding.
Note: When applying grease, make sure not to apply grease to any areas that may contact the strap. Grease
on the strap will cause sealing and feeding problems.
Remove the two bolts and the spring fastening the seal anvil. Slide the seal anvil out of its guides. Clean the
seal anvil and coat the sides with the same white lithium grease. Check to make sure the strap end detect
switch is clean and moves freely. Reassemble.
Remove the remaining strap guides, strap feed pinch roller, and high tension arm. Check for strap fragments,
blow the area out, and then check the feed pinch roller bearing spins easily. (Always replace this bearing with
the same rubber shielded, low drag, bearing.) Coat the pivot shafts of the feed pinch roller assembly and the
high tension arm with white lithium grease and reassemble.
Visually check and feel the surface of the two pinch rollers that feed strap into the accumulator box. If grooves