TE055 Issue 17 © 2013
2
MAINTENANCE
Inspect your oil pump and associated hoses weekly for any
signs of damage. Replace any damaged or worn components.
DISASSEMBLY
Note: For servicing the Air motor and Piston rod seal without re-
moving pump from the installation follow the disassembly proce-
dure steps 1 and 2, followed by steps 5 to 14. Reassembly is a
reversal of the disassembly procedure.
Complete Pump Disassembly:
1) Disconnect air supply and release oil line pressure.
2) Remove oil discharge hose from pump outlet.
3) Withdraw pump from the oil drum/tank. (Use a clean bench to
carry out maintenance).
4) Hold air motor housing firmly in a vice and carefully unscrew
and remove the pump tube (20) assembly.
Note: Care should be taken not damage air motor housing
during disassembly.
5) Remove 4 screws (44) from the air motor housing (2).
6) Remove the buffer spring (1) and buffer stopper (3) from air
motor housing (2).
7) Push the air motor and piston rod assembly downwards into the
pump tube (20) to enable easy disassembly of the air motor.
8) Remove the three Allen screws (5) and washers (5A from the
air valve assembly, then remove air valve cap (6).
9) Lift up the cover (17) to expose the exhaust holes located on
the piston rod (41).
10) To retain the piston rod (41), insert the correct size steel bar
or pin punch into one of the exhaust holes on the piston rod (41).
Note : Ensure you do not damage Piston Rod (41) during
disassembly and assembly.
11) Unscrew the piston rod bolt (7), and remove the air valve as-
sembly (8,9,10,11,12,14,43) and o’ring (13)
12) Remove the top adapter and piston seal assembly (15,42,16)
from the piston rod.
13) Carefully remove circlip (16) and piston rod seal (42) from the
top adapter (15).
14) Remove cover (17) and silencer (40).
15) Using a suitable size pin punch (1/8”) remove the roll pin (36)
from the Piston rod (41).
16) Unscrew and remove the connecting rod (35) and plunger
assembly from the piston rod (41).
17) Dismantle plunger assembly.
18) remove the piston rod (41) from the bottom adapter (18).
19) Remove circlip (39) from the bottom adapter (18) and remove
oil seal assembly (37).
20) Remove foot valve (28) from the pump tube (20).
21) Dismantle foot valve assembly.
REASSEMBLY
1) Clean and inspect all parts. Replace any suspect worn or dam-
aged parts.
2) Ensure that all parts have the correct orientation. If parts are
assembled upside down, the pump will not work. Check the parts
diagram for correct orientation.
Note: Use Loctite 222 (or similar retaining compound) on the
piston rod bolt thread (7) and the three Allen screws (5) when
re-assembling air motor.
Ensure correct orientation when fitting the seal carrier (37C),
place the chamfer side into the bottom adapter first, be care-
ful you do not damage the seal during assembly.
3) Assembly of the pump is a reversal of the disassembly
procedure.
4) Fit the pump to your drum/tank and re-connect the oil hose and
air supply. Open dispensing nozzle to ensure correct operation.
TROUBLE SHOOTING GUIDE
TROUBLE
CAUSE
REMEDY
Air motor operates without
pressing gun trigger
1) Drum or tank is empty.
1) Change drum or fill tank.
2) Foreign matter in footvalve (28).
2) Remove footvalve, clean and reassemble.
1) Drum or tank is empty.
1) Change drum or fill tank.
2) Foreign matter in footvalve (28).
2) Remove footvalve, clean and reassemble.
3) Faulty plunger (31) assembly.
3) Inspect plunger assembly replace any damaged or faulty parts.
Air continuously leaks
through exhaust.
1) Piston rod seal (42) worn or damaged.
1) Replace piston seal.
2) Air valve worn or damaged.
2) Replace air valve assembly (Order R100-1K).
Oil leaks through exhaust
Oil seal (37) is worn or damaged.
Replace oil seals
(for R100 order R100-2K)
(for R300 order R300-2K)
Pump is operating erratically
and has air in the oil.
Suction tube is sucking air.
1) Re-seal suction tube. (Use either Teflon tape or suitable thread
sealant)
Pump tube (20) is sucking air.
2) Re-seal pump tube. (Use either, Teflon tape or a suitable
thread sealant)
Air motor does not operate
when air is applied.
Air valve cap is damaged or faulty
Replace air vale cap (6)
Air motor operates but little
or no oil flows.