8
Parker Hannifin Corporation
Gear Pump Division
Youngstown, OH
13) Grease the new gasket
seals and insert them into
the grooves in both sides
of all gear housings.
For the PGP031/051 -
Examine all dowel pins.
(See page 9.)* Before
inserting a pin, make certain
that the hole is clean and
free from burrs. Start the
pin into the hole gently and
straight, tapping lightly with
a soft hammer.
14) Slide the first section
gear housing over the
gears and tap it with a
soft hammer until it rests
tightly against the shaft
end cover.
Be careful not to pinch the
gasket seal. Squirt oil over
the gears to provide initial
lubrication when the pump
is started.
For the PGP031/051-Line
up the dowels with the
matching holes. When the
parts are parallel, squeeze
them together or gently tap
alternately over dowels
with a plastic hammer until
the parts become parallel
and move smoothly
together. Do not force.
15) With the thrust plates
mounted on the bearing
carrier (as in steps 9, 10,
11), position it on the gear
housing so that the roller
bearings receive the journals
of the drive and driven
gears. Make sure that the
drain port in the bearing
carrier is on the suction or
inlet side if the unit is being
built as a pump. (Motors do
not have drain vents in the
bearing carrier.) Make sure
that the index marks are
properly aligned.
Insert dowel pins
(PGP031/051 only).
For multiple assemblies only.
16) Insert the connecting
shaft in the spline of the
drive gear.
For multiple assemblies only
17) Insert the drive and
the driven gears of the
second section into their
respective bearings.
Make certain gears are
in contact with the thrust
plate face.
For multiple assemblies only.
18) Slide the second section
gear housing over the gears
and tap it tight against the
bearing carrier with a soft
hammer. Be careful not to
pinch the gasket seal. Squirt
oil over the gears to provide
initial lubrication when pump
is started.
For PGP031/051 line up the
dowels and the holes in the
2 castings. When parts are
parallel, squeeze them
together or gently tap
alternately over the dowels
with a plastic hammer
until parts move smoothly
together. Do not force. Insert
dowel pins (PGP031/051only).
For multiple assemblies only
19) Place the port end
cover over the gear
journals and tap tightly
against the gear housing.
Be careful not to pinch the
gasket seal.
For PGP031/051 Align the
dowels with the holes in the
mating casting. Being
careful not to pinch the
gasket seal, tap the port
end cover lightly in the
center between bearing
bores to engage the dowels
and to move parts together
in final seating.
20) Thread the 4 fasteners
(cap screws and washers,
or studs, washers, and
nuts) into the shaft end
cover and tighten
alternately or cross-corner.
Rotate the drive shaft with
a 6" wrench to make
certain there is no binding
in the pump.
Service Manual HY09-SM030/031/050/051/US
Assembly Instructions
Series PGP 030/031 Series PGP 050/051
