
FF-MM-317-REV - 01
Page 6
Operation and Maintenance Guide Barrel pump
Disassembly and Re-assembly
a. Unscrew Hose Nipple (43) and Hose
Nipple (44) from Piston Housing (23).
Unscrew Bottom Cap (41) from Barrel
Pipe (37) and Drain out remaining oil
from barrel pipe (37).
b. Unscrew Hex Bolt (42) and Nylock Nut
(38) from Barrel Cap (36), Now remove
Bush (40) and Plain Washer (32) from
Barrel Cap (36) and replace it with new.
(If found damaged)
c. Hold the Piston Housing (23) and using a
pipe wrench Barrel Pipe (37) to unscrew
it. Remove O-ring (27) from Piston Rod
(18) then remove Lock Pin (19) from
Piston Rod (18) and replace it with new
ones. (If found damaged)
d. Now remove piston assembly from Piston
Rod (18). Now unscrew Nylock Nut (33)
from Connecting Sha (28) to remove
Plain washer (32) and Plain Washer (4).
e. Now remove O-ring (21) and Piston Seal
(29) from Piston (30) grooves and replace
it with new ones. (If found damaged)
f. Now hold Piston Housing (23) to un-
screw Air Cylinder (20) from Piston
Housing (23).
g. Now remove Piston (13) and Piston Rod
(18) assembly from Exhaust Shield (3)
side of Piston Housing (23).
h. Now unscrew CSK Screw (10) with
Spring Washer (2) from Upper Backing
Plate (11) from Piston (13).
i. Now remove Upper Backing Plate (11)
from Piston (13). Now remove Distance
Piece (12) from Piston (13) and replace it
with new ones. (If found damaged)
j. Now unscrew Piston Rod (18) from
Piston (13) . Now remove Rest plate from
Piston Rod (18).
k. Now remove Spring (16), Locking plate
(15) and Piston Seal (14) from Piston
(13) and replace it with new ones. (If
found damaged).
l. Unscrew Knob (35) from Barrel Cap
(36). Now remove Barrel Cap (36)
from Barrel Pipe (37). Now remove
Spring Plate (34) from Barrel Cap (36)
and replace it with new ones. (If found
damaged).
m. Now unscrew Pan head screw (10) with
Spring washer (2) from Exhaust Shield
(3). Now remove Exhaust Shield (3)
and Plain Washer (4).
n. Now unscrew Cylinder Cap (7) from
Cylinder (20). Now remove Conical
Spring (9) and Washer For Conical
spring (8) from Cylinder Cap (7).
o. Now remove Tube (5) and O-ring (6)
and replace it with new one. (if found
damaged)
p. Please pay attention to the assembly
of certain components. Such as Upper
Plate (11) and Lower Plate (15) must be
assembled in the correct direction as
shown in exploded view. (Refer Detail
C)
q. Piston Seal (14) and Piston seal (29)
must be assembled in correct direction.
Check that the Y portion in seal (14) is
facing downwards i.e. towards the top
of the pump. And the Y portion of seal
(29) is facing upwards i.e. towards the
bottom of the pump.
r. Now follow the above steps in reverse
manner to reassemble the Barrel Pump.