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48
CROSS COMPOUND AIR COMPRESSORS
Reversinq
Valve
I
He<llter Connections
Fig. 19.
Photographic Views of the Type "F-I-A" Mechanically
Operated Lubricator
TYPE "F-I-A" LUBRICATOR
49
cylinder, above the intake port
a
and the oil from the
reservoir flows into the pump cylinder, filling the space
above discharge ball check 15. When the cam passes
out of the plunger rod
spring 12, now free to act
on the plunger, forces it down until it is stopped at the
desired stroke by adjusting nuts 14 contacting with
the upper end of the plunger rod guide.
The rapid down-movement of the plunger discharges
the oil in the oil pump cylinder at high pressure and
forces it past the two discharge ball check valves 15
and 19, through the delivery pipe to the compressor. or
governor fitting and past the non-return check in the
terminal fitting to the part to be lubricated.
Each of the
plungers makes one stroke durmg a
revolution of the ratchet wheel which occurs
during ] 00 double strokes of the compressor.
Adjustment
The amount of oil delivered per stroke is controlled
by the distance the plunger is allowed to move down
ward, the adjustment being made by means of adjusting
nuts 14. To increase the amount of oil delivered, the
nuts are turned to the left and to decrease the oil de
_
After
ment the two nuts are tightened together or "locked".
In order to change oil feed adjustment, remove nut 51
and lock washer 50 then lift the cover 48. The adjusting
nuts 14 are then accessible through an opening in the
ratchet wheel. With the older Type F -1 lubricator, it is
necessary to remove the ratchet wheel (by means of
three screw:" 31) to expose the adj usting nuts.
~
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