
Disassembly
1 Remove valve cap (12) and trip rod pin
(11).
2 Unscrew four nuts (64) from tie rods
(65) and remove trip rod collar (13).
3 Unscrew trip sleeve (8) from trip rod
(31) and lift air valve casting (9) off of air
cylinder (34).
4 Remove packing nut (67) and packing
cap (70) from air valve casting.
5 Remove four valve cover screws (15)
and cover (61).
6 Remove four toggle plate screws (16),
toggle assembly (62) and trip shoe (63).
7 Remove four valve seat screws (60),
springs (59), valve guide plate (not
shown) and valve slide seat and gasket
(58).
8 Unscrew trip rod packing nut (20) from
air valve casting and remove all packing
parts.
9 Unscrew pump tube from outlet body
(33).
10 Remove air cylinder (34) and air passage
tube (35) from outlet body.
11 Extend air motor piston rod (1) out bot-
tom of outlet body. Place wrenches on
air piston bolt (2) and on wrench flats of
piston rod and unscrew piston rod.
Thread piston rod through gland packing
to allow removal of pump tube.
12 Unscrew gland packing nut (21) from
outlet body and remove all gland parts.
To prevent personal injury, perform
pressure relief procedure before and
after operating the pump and before
performing any disassembly or
assembly.
WARNING
!Notice
If complete disassembly is re-
quired, order the repair kit and replace
ALL gaskets, 0-rings and packings.
13 Remove priming tube (50) from bushing
extension (51).
14 Extend plunger rod (43) out bushing
extension and unscrew priming plunger
(49) to allow removal of priming check
parts and plunger rod (43).
15 Remove bushing extension (51) and
unscrew plunger and bushing assembly
(40) from pump tube. Unscrew coupling
nut (36) from plunger adapter (53) to
allow removal of plunger and bushing
assembly intact, reducing the chance of
losing ball stop (38) and check ball (39).
Assembly
To assemble, perform disassembly proce-
dures in reverse. Tighten fasten ers per stat-
ed torque specifications.
!Notice
To prevent damage to air piston
packing and pump gland packing, and to
help increase packing life, lubricate air
cylinder and air piston rod before
assembly. Thread piston rod through
gland packing when assembling pump
Before tightening four valve seat screws
(60), align valve slide and seat plate (58),
slide valve gasket (56) and air valve casting
(9) by placing a rod through the center hole.
Start all fasteners by hand to avoid
stripping threads when reassembling.
Repair
Repair is limited to replacement of listed
service parts. Special procedures and tools
are required. Contact Lincoln Customer Ser-
vice, One Lincoln Way, St. Louis, MO 63120-
1578, (314) 679-4200 for your nearest au-
thorized service center.
When ordering replacement parts,
list:part number, description, model number
and series letter.
Troubleshooting
If the following procedures do not correct
the problem, contact a factory authorized
service center. When submitting equip ment
to be repaired, be sure to state the nature of
the problem and indicate if a repair cost es-
timate is required.
Problems
Airmotor does not operate.
• Check air supply to pump.
• Check for broken trip rod.
• Broken toggle or foreign object lodged in
priming tube. Check for rust, worn or
scored parts.
Air seepage from air exhaust while pump
is not operating
• Check valve slide (58), seat and gasket.
Check trip rod packing (19) and gasket
(17) for cut or damaged packing.
Loss of pressure, volume or continuous
operation of pump when not in normal
use.
• Remove and clean lower inlet checks.
Check for foreign material.
• Inspect sealing surfaces between upper
and lower inlet checks. Replace if rough or
pitted.
• Replace shovel rod if rough or pitted.
Replace shovel rod packing (45).
• Inspect lubricant supply line for leaks or
breaks.
Lubricant leaking from weep hole in
outlet casting.
Replace 0-ring (26) and U-cup (27). Make
sure gland nut (21) is tight.
Excessive amount of air in lubricant or
excessive amount of lubricant coming
from air exhaust.
!Notice
Some lubricant exhausts with air
normally..
• Replace gland packing (23), gland gasket
(24), 0-ring (26) and U-cup packing (27).
6