[R-390] Green gear Production Change
Roger Ruszkowski
flowertime01 at wmconnect.com
Thu Dec 6 16:32:31 EST 2012
Robert,
Find yourself a PDF copy of TM 11-5820-357-35 on the net.
You ask,
Am I using it correctly?
See page 67 of the TM.
See figure 43 of the TM
Read paragraph 59. Rf Subchassis (fig.40 and 41.)
a. (3) Note. The offset gear is used only to maintain synchronization of the gear train when the rf subchassis is removed
from the receiver. In early production models, the green offset gear is reversed to disengage from the rf gear train.
__________________ end of TM stuff ______________________
There is no comment in the TM about needing the gear.
There is no comment in the TM about the gear locking the gear train.
Figure 43 shows the green gear mounted on the end of the shaft.
Make sure the gear's D hole sets on the shaft.
The 6 x 32 bolt should firmly hold the gear to the shaft so
the gear does not turn on the shaft and allow synchronization of the gear train
to be lost.
When you mount the gear up top in its storage space,
you turn the teeth away from the front plate.
Green side up.
When you mount the gear on the end of the shaft in use,
you turn the teeth out from the front plate to engage the gear.
Green side up.
The dish in the gear lets a thin piece of sheet metal perform an elegant function.
I hope you have pulled the deck and gotten on with the maintenance,
these receivers are for receiving signals not pondering over.
OK a change to the R390 RF deck.
Early production had the gear on the shaft backwards.
Later production had a place to mount the gear up near the top
of the gear train on the front of the gear train assembly.
Roger.
More information about the R-390
mailing list