9. Gaskets on doors (Ref. 103, Plate J-112) are to be kept in good condition to keep out dust and insects. If gaskets are defective replace the door and send to shop for repairs.

10. Flag holder casting (Ref. 94, plate J112) is to be kept tight on the armature shaft.  Erratic action or failure of the wigwag will result from improper location of this part.  Should consider-able play be found at this point it is probable the taper key is worn and the mechanism should be shopped.

11. Banner pipe is to be kept securely tightened in the flag holder casting.

Banners are to be kept neatly painted and roundels clean.  Inspect lamp receptacle, wiring and con-nections.  Should a banner be found which has been damaged in any way, such as being struck by a high load on a truck, replace the banner and care-fully inspect all other details of the mechanism. A broken armature shaft may not immediately inter-fere with the wigwag operation but can result in ultimate failure if not detected.

12. Ball bearings (Ref. 68 and 69) are to be oiled every three months with Pale Semaphore oil.

Our mechanisms are equipped with several types of bearings which are shielded in various manners and as the shields may prevent the oil from reaching the bearings, an effort must be made to apply oil to both sides.  The oil cup, where provided, is intended for the outside and the grooves in the armature hub next to the end castings are for the inside.  If "(half shielded bearings -oil inner side only)" has been marked on the magnet assembly, the oil need be applied to the inner side only.

Do not get oil on wiring or other parts where oil is not intended.  Carefully wipe up surplus oil that drains from the bearings.