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Read and carefully observe these operating
instructions before unpacking and operating
the air grease gun The gun must be oper-
ated, maintained and repaired exclusively by
a person familiar with the operation instruc-
tions Operate the gun only after safety
instructions and this operation manual are
fully understood
WARNING
Extreme pressure may cause whip hose to
burst Use only Lincoln approved hoses and
follow the hose instructions and warnings
WARNING
Use safety glasses and gloves for protection
during operation Keep hands clear of the
exposed rubber portion of hose Grease gun
can develop high pressure up to
6,000 psi (414 Bar)
This grease gun generates high grease
pressure Extreme caution should be used
when operating the gun as material leaks
from loose and ruptured components can
inject fluid through the skin and into the
body causing serious bodily injury
Adequate protection is recommended to
prevent splashing of material onto the skin
or into the eyes
NOTICE
Tool must be oiled daily Apply 1 to 2
drops of pneumatic tool or light machine
oil at air inlet/air nipple
All warranty claims are void if oil
maintenance is not performed
Indicates change
*
WARNING
If any fluid appears to penetrate the skin, get
emergency medical immediately Do not treat
as a simple cut Tell attending physician
exactly what fluid was injected
Personal safety
1 Always wear eye protection The air grease
gun can generate up to 6,000 psi (414 bar)
of pressure
2 Use only Lincoln 1230HT* outlet whip
hoses Grease injection injuries are a very
serious injury Hold the hose only in the
area of the spring guard
3 Avoid accidental starting Be sure trigger is
not depressed when attaching inlet air
hose
4 Do not bend the hose in small radii
5 Replace the hose at the first sign of wear,
kink or damage to the outside jacket
Quick start
instructions
1 Attach high pressure grease hose and
coupler (1) to outlet in the head (5)
Copper gasket must be used to seal hose
thread to head Tighten securely
2 Attach air coupler nipple (21) to port in
bottom of handle (6) and tighten securely
3 Fill grease container († page 6 for various
options)
4 Prime grease gun by operating slowly until
grease flows from coupler (2)
(† Operation section, page 5) for
detailed priming procedure
5 Adjust air pressure to grease gun as
required, and gun is now ready for use
6 Disconnect air supply to grease gun when
not in use
4
Description
Lincoln air operated grease gun is fully
pneumatic operational and automatic unit
The gun was developed for manual
lubrication of the grease points and has
ability to stall in case of a blocked bearing,
fitting or lubrication line The gun is a
positive displacement single action pump
that delivers lubricant each time the
plunger (13) moves forward
The gun features a throttling trigger valve
A slight pull of the trigger (8) will cause the
gun to operate slowly As more finger force is
applied to the trigger, the speed of the gun
will gradually increase until maximum speed
is reached with the trigger fully pulled
The maximum speed of the gun is limited to
reduce the problems associated with dispen-
sing lubricant too quickly, such as damaging
bearing seals or dust boots
The gun operates when the trigger (8) is
depressed Air is admitted to chamber A
(† fig 1, page 4) and pushes the piston (7)
with the plunger (13) to the left Vent valve B
is closed The grease, under pressure from
plunger (13), opens the check valve (3)
and delivers one shot of the lubricant
When the piston (7) reaches the bypass
groove C († fig 2, page 4) air is admitted
into chamber D and opens the vent valve B
The air pressure from chamber A is vented
through valve B and vent holes E to the
chamber F which communicates with the
atmosphere through the hole G The air
pressure is equalized on both sides of the
piston (7) and the force of the spring (12) will
return the piston to the initial position,
recharging the gun († fig 1, page 4)
Vent valve B will be closed and air from
chamber D is vented through the bypass
groove C to the atmosphere The cycle
repeats in the same manner while the
trigger is depressed
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