Revision 6
G.
L-55i
Oil
Plunger Lubricator
Note:
Refer to Section 9: PARTS for breakdowns and parts lists for the following
procedures:
Pump Description:
The Model
L-55i
Lubricator Pump is
an
improved version
of
the previous Lincoln Model
55i Lubricator
Pump. Pump performance and serviceability have been improved. The pump
has been simplified and the number
of
parts have been reduced. The number
of
seals have
been reduced by creating a unit pump body and sight glass, thus reducing the number of
service parts and possible leak problems.
Pump Operation:
The pump is operated by a rotating cam against the pump rocker arm, causing the pump's
plunger to reciprocate within its bore in the pump body.
The pump output is set by the adjusting sleeve on the top
of
the pump body. The sleeve
limits the stroke length
of
the pump plunger thus limiting the pump output. Full pump
output may be obtained when the adjusting sleeve is fully extended out
of
the top
of
the
plunger stroke.
Maximium recommended oil viscosity is
8000 SUS.
Suction Stroke:
As the plunger moves downward, oil is drawn through the suction check and into the plunger
bore from the small reservoir in the sight glass. Reducing the volume
of
oil in the sight glass
creates a vacuum which draws oil from the lubricator reservoir, through the suction tube and
into the outside passage in the sight glass. The oil will enter the dropper and drip into the
sight glass reservoir, replacing the oil removed by the suction stroke. The quantity
of
oil
delivered may be determined by counting the drops
of
oil falling out
of
the dropper.
Discharge Stroke:
As the plunger moves upward, oil
is
forced from the plunger bore through the outlet checks
and into the lubrication feedline. The suction check prevents any backflow
of
oil into the
sight glass assembly and allows any oil that may bypass the plunger to be returned to the
sight glass area through a return passage.
© Copyright October,
2001
NLB Corporation
8-69
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