Lower Pump Tube Disassembly and Cleaning Instructions
Cleaning: Use Mineral Spirits and a Brush to Thoroughly Clean all Debris out of the Foot Valve 61275
and Extension Tube 61273; Thoroughly inspect all parts for wear or damage; Clean all Parts
Tentative Check List
1: Is the Plunger Rod 11723 bent?
2: Is the Packing 35073 excessively worn?
3: Is the Check Seat 11725 worn or have abrasions or cuts?
4: Is the plunger 11724 bent or broken?
5: 95% of the problems with the pump not pumping material; not holding pressure or not operating have
to do with foreign Material such as Rocks, Stones, Metal, Nuts, Bolts, Plastic, Paper, Gum and other
materials being picked up by the downtube and getting caught in the extension tube or the down
tube. When Changing Lube Containers, Watch where you lay the pump and what the downtube
touches. Anything will stick to the grease on the end of the downtube.
95% of the problems that occur with the pump not
pumping material; not holding pressure or not
operating at all have to do with foreign Material
such as Rocks, Stones, Metal, Nuts, Bolts,
Plastic, Paper and other materials being picked
up by the downtube and lodging themselves in
the extension tube or the down tube.
To avoid this, use a strainer for the downtube, if in a
difficult environment. In rare cases with paper
and bubble gum, the material can work its way
up into the bushing and plunger assembly
(90554) and therefore this part needs to be
disassembled and cleaned as well. If sand or
dirt is a constant problem, you will find that the
bushing and plunger assembly will wear
excessively. These two pieces are lapped and
fitted together as one. Constant Sand or Dirt
passing through the part 90554 Bushing and
Plunger can ruin the tight fit.
Procedure
Fig A. (See Fig. A) Lay pump horizontal in vise and
grip outlet body tightly in vise jaws. Hold
Extension Tube (61273) and unscrew Priming
Tube (61275).
Fig B
. (See Fig. B) Pull Plunger (11724) straight out
until Plunger Rod (11723) is extended as far as
possible out of the Extension Tube (61273). Hold
bushing of Piston (90554) and unscrew Extension
Tube (61273).
Center Extension Tube (61273) between end of
piston bushing and Plunger (11724). Insert any
pointed tool in through hole at Base of Check Seat
11726.
Note:
Plunger may unscrew from Plunger Rod
(11723) or plunger rod may unscrew from Check
Seat (11726). Extension Tube (61273) can be
removed from free end of Plunger Rod (11723).
Fig C
: (See Fig. C) When you remove the Extension
Tube (61273) this exposes the Check Seat
(11725), Priming Check (11721), Check Stop
(11722), Support Bushing (11702) and Plunger
Packing (35073).
Note:
Unscrew Priming Check Seat
(11721) from Check Stop (11722) to remove
Support Bushing (11702) and Plunger
Packing (35073); To do this you will have to
put Check Seat (11721) in a vise and insert a
point tool such as a punch through the holes
in Check Stop (11722) to unthread Check
Stop (11722) from Check Seat (11721).
Plunger Packing (35073) incurs heavy wear and it
is advisable to replace this part if worn.
Perform this only if you need to remove
Bushing and Plunger Assembly;
Otherwise Reassembly Pump Tube
Fig D
. (See Fig. D) Removing Bushing and
Plunger Assembly (90554ME); Hold pump
tube and unscrew bushing of Piston
(90554). Bushing should slide off once
unthreaded from the Pump Tube.
Fig E
. Grip two flats at top of piston plunger
with an end wrench and remove Check
Seat (11726).
Note: Check Ball (66010) may remain in
plunger after Check Seat (11726) is
removed. To remove check ball tilt pump in
vise and gently tap top of plunger at
location of two flats.
