User Manual
Lubrigun Pumps 50:1
7.3A-38010-C05
Page 15 of 22
Subject to change
LINCOLN GmbH & Co. KG
∗
Postfach 1263
∗
D-69183 Walldorf
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Fax + (49) 6227 33259 ∗ Tel + (49) 6227 330
Lubrigun Pumps No. 82050, No. 82054, No. 83513, No.82050-E575, Ser. J
5.
6 Troubleshooting - Check List -
Problem Possible Cause Solution
Pump does not operate. Airmotor does
not start operating.
Air supply is shut off.
Air supply is inadequate.
(Air pressure too low).
Trip Rod (16) broken
and/or
Toggle Plate (74) broken.
Foreign object clogging the pump tube.
Obstructed material output.
(For example the material control valve is
clogged)
Check if main air supply is shut off; if not,
check air connecting line to Pump for
breaks/disconnection of air supply and
clear air flow obstructions.
Cautiously increase air pressure to pump
by air pressure regulator if pressure too
low.
Shut off pump. Perform pressure relief
procedure. Check Airmotor. Dis-
assemble. Check parts and replace if
damaged.
Shut off pump. Perform pressure relief
procedure. Disassemble pump tube.
Clean and inspect check valves of pump
tube. Replace parts if damaged.
Shut off pump. Perform pressure relief
procedure. Disassemble and clean
material line components to remove
restrictions.
Air seepage from air exhaust while pump
is not operating.
Valve Slide & Seat (65) / Gasket (64) of
airmotor damaged.
Sealing (22 & 24) damaged. Seepage
between air cylinder and airmotor head.
Shut off pump. Perform pressure relief
procedure. Remove parts for inspection
and replace if damaged.
Shut off pump. Perform pressure relief
procedure. Disassemble airmotor and
replace parts.
Erratic or accelerated operation of the
pump. Pump cycles increase but material
output unchanged.
Material too ‘heavy’ or pump cycles too
fast for intake of material. Increase of
viscosity of the material caused for
example by temperature drop.
Insufficient material supply. Pump sucks
air because of low level of material.
Reduce air pressure to pump.
Heat material.
Shut off pump. Refill or change material
container.
Continuous operation of pump when not
in normal use (outlet / material control
valve closed)
Material container empty on continuous
acceleration of pump cycles.
Material supply line broken/leaking.
Inlet Check Valve (51 & 52 ) of pump
tube inlet damaged.
Shut off pump. Refill or change material
container.
Shut off pump. Check and tighten line.
Shut off pump. Perform pressure relief
procedure. Remove check valve and
inspect; replace if damaged.
Loss of pressure and volume. Pump does
not stop operating after material outlet is
closed.
Priming check seat (51 & 52) in lower
part of pump tube or check (43 & 46) seat
in plunger are worn.
Plunger rod (47) and packing (49) in
lower part of pump tube are damaged or
worn.
Shut off pump. Perform pressure relief
procedure. Disassemble pump tube and
replace worn check parts.
Shut off pump. Perform pressure relief
procedure. Disassemble pump tube and
check. Replace packing or damaged
plunger rod.
Material leaking from weep hole at
bottom of Outlet Casting (14).
Seals of gland in outlet casting are worn. Shut off pump. Perform pressure relief
procedure. Disassemble pump. Check if
Gland Nut (27) is tight.
Remove Gland Nut and parts. Replace
O-Ring (32), U-Cup Packing (33),
Packing (29) & Gasket (30). Check
Piston Rod (11) and replace if worn.
Excessive amount of air in material
(lubricant) or excessive amount of
lubricant coming from air exhaust.
Seals of gland in outlet casting are worn. Solution as described above
Note: All codes indicated in bold-type bracket ( ) refer to item numbers listed on service parts dwg. and service
parts list of the pump models.
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