=a.= When installing generator, the important point to consider is correct shimming of generator in its cradle to provide correct mesh of driving gear with intermediate timing gear. Make sure same number of paper shims are used in reassembling as were found underneath generator when it was removed. After an engine has been run a considerable length of time and gears have worn to some extent, they have possibly developed sufficient lash or play to safely remove one or more of the original shims, and thus affect closer meshing and quieter operation. However, this should not be done unless timing gear case cover is removed so that gear mesh and lash can be carefully checked.
(1) Pass generator drive gear end through gear case hole, lifting generator so that oil slinger clears intermediate timing gear. Turn generator in its cradle so that end holes line up with long mounting screws which pass through gear case cover. Tighten mounting screws securely.
(2) Install curved washer, lock washer, and nut on end of clamp strap; tighten nut securely.
(3) Connect red‐black wire to generator terminal marked RELAY, and green wire to generator terminal marked SWITCH. Refer to wiring diagram (fig. 55).
(4) Operate engine and check generator for current output, as well as check for gear noise. If shimming under generator is proper, generator and timing gears will run quietly. If necessary, readjust shimming until gears operate quietly.
=a.= Operation of the instrument panel green signal light, indicating generator charge, is controlled by the cut‐out relay. Therefore, if relay is faulty the signal light will not operate properly, falsely indicating generator trouble. Rust around the contact points, burned points, and loss of armature spring tension are sources of most relay trouble. NOTE: _Before condemning a relay because of failure of green signal light, make light test_ (par. 120).
=b.= Correct adjustment of relay point gaps and tensioning of armature springs require use of precision electric meters and expert knowledge on the subject. A faulty relay, other than removing cover and cleaning with air, should be replaced. No adjustment of points should be attempted.
(1) Disconnect the three wires from relay terminal screws.