Section Ill. TRANSFER PUMP
(Used on Serial Numbers 69-29737 through 69-29942)
place if necessary. Screw air cylinder in place
8-6. General
making sure valve springs (14) are in proper
The transfer pump is an air operated device
position in top of cylinder.
used for transferring lubricants from original
(e) If air is leaking around air piston
drums to the lubricant storage tanks.
tube, remove air cylinder assembly (3) and
drive out pin (20) located where upper pump
8-7. Transfer Pump
rod enters air piston. Unscrew piston from rod
and pull out through pump body; then replace
O-ring (17). Reassemble in reverse order.
Note. Be sure hole in rod lines up with hole
b. Disassembly. Disassemble the transfer
in piston adapter. Rod is not tightened all the way in
pump in the numerical sequence as illustrated
the adapter.
in figure 3-4.
(2) If pump operates with control handle
c. Cleaning and Inspection.
shut off or insufficient delivery with control
(1) Clean all parts using an approved
open, proceed as follows:
cleaning solvent.
(a) Clean foot valve by removing exten-
(2) Check to see that foot valve is clean
sion tube and unscrew foot valve from lower
and free from all dirt and foreign matter.
end of pump tube. Remove retainer (38) and
(3) Check to see that air coupler is clean
ball (37). Clean ball and body thoroughly,
and operates easily.
replace.
(4) The packings should be replaced
(b) Clean Transfer valve by unscrew-
periodically.
ing pump tube (35) from body (21).
(5) Inspect pump rods and tubes for
Note. Grasp pump tube with pipe wrench at
bends, breaks or other defects which would
extreme lower end to eliminate possibility of denting
tube.
prevent proper operation.
(c) Unscrew nut (34), then remove
d. Repair.
valve (33) and piston (30). Clean thoroughly
(1) If pump is not operating, air piston
and inspect valve and piston for scratches or
tube not moving, or air blowing constantly
burrs. If necessary, polish with fine emery
from piston rod adapter, proceed as follows:
cloth.
(a) Remove air cylinder assembly (3),
(d) Inspect leather packing (31), re-
then pull air piston (10) to the extreme out-
place if necessary by removing piston nut (32)
ward position.
from piston (30). Reassemble in reverse order.
(b) Using heel of hand, push on upper
(3) If oil leaks out of Pump body where
valve plate (8), holding air piston in other
rod (24) enters, replace packing as follows:
hand so as to expose O-rings (12). Replace O-
(a) Remove pump tube, transfer piston,
rings if damaged.
etc., as described in step 2.
(c) Inspect O-ring (9) by pulling out
(b) Remove pin (20) from rod (24).
on upper valve plate, replace if necessary, by
Unscrew rod from air piston. Replace packing
removing three nuts (5) under lower valve
(25) and reassemble.
plate (13); then pulling O-rings through ports
e. Reassembly. Reassembly is essentially the
on air piston. Reassemble in reverse order.
reverse of disassembly.
(d) Inspect O-ring (11) for wear. Re-
