PN 97999-1028
NM2202A-XPage2of2

PUMP OPTION DESCRIPTION CHART

NM2202A - X 1 - X 3 1
CONTAINERSUITABILITY
PLUNGER TYPE
SPRING ARRANGEMENT
CONTAINERSUITABILITY PACKING MATERIAL
1 -Universal (Stub) 7 -PTFE (upper and lower)
4 -55 Gallon B - UHMW-PE (upper) / PTFE (lower)
C -UHMW-PE(upper and lower)
J -Polyurethane (upper) / UHMW-PE (lower)
SPRINGARRANGEMENT PLUNGERTYPE
3 -No Spring 1 -Standard (Carbon steel)
PACKINGMATERIAL

GENERAL DESCRIPTION

Model NM2202A-X Series two-ball, double acting pumps are intended
tobe used primarily for oil transfer and delivery systems. It is best to use
this pump with low --medium viscosity fluids. It uses carbon steel and
othermaterials which make it compatible with most petroleum based lu-
brication products. The two-ball design provides better priming of the
lowerfoot valve. Double acting pumps will deliver material on both the up
and down stroke.
NOTE: If this pump was purchased separately (not part of a system),
consult your sales representative for compatible dispensing accesso-
rieswhich will best match the application. All accessories must be able
to withstand the maximum pressure developed by the pump.
WARNING HAZARDOUSPRESSURE. Do not exceed maxi -
mumoperating pressure of 351 p.s.i. (24.2 bar) at 150 p.s.i.(10.3
bar) inlet air pressure.
PUMP RATIOX MAXIMUM PUMP
INLET PRESSURE TOPUMP MOTOR =FLUID PRESSURE
Pumpratio is an expression of the relationship between the pump motor area and the
lowerpump end area. EXAMPLE: When 150 p.s.i. (10.3 bar) inlet pressure is supplied
tothe motor of a 4:1 ratio pump it will develop a maximum of 600 p.s.i. (41.4bar) fluid
pressure(at no flow) - as the fluid control is opened, the flow rate will increaseas the
motorcycle rate increases to keep up with the demand.
WARNING Referto general information sheet for additional
safety precautions and important information.
NOTICE:Thermal expansion can occur when the fluid in the materi-
al lines is exposed to elevated temperatures. Example: Material
lineslocated in a non-insulated roof area can warm due to sunlight.
Install a pressure relief valve in the pumping system.
Replacement warning label (pn 94520) is available upon request.

TROUBLE SHOOTING

Pump problems can occur in either the Air Motor Section or the Lower
PumpEnd Section. Use these basic guidelines to help determine which
section is affected. Be sure to eliminate any possible non-pump prob-
lems before suspecting pump malfunction.
Pump will not cycle.
•No pressure to the motor.See motor manual.
•Damaged motor.Service motor
No material at the outlet (pump continually cycles).
•Checkthe material supply, disconnect or shut off the air supply and
replenish the material, reconnect.
Material on one stroke only (fast downstroke).
•The lower check may not be seating in the foot valve (see lower
pump disassembly). Remove the check from the foot valve, clean
andinspect the valve seat area. If check or foot valve are damaged,
replace.
Material on one stroke only (fast upstroke).
•The middle packings may be worn (see lower pump disassembly).
Replace the seals as necessary.

PUMP CONNECTION - UPPER / LOWER

NOTE: All threads are right hand.
1. Laythe pump assembly on a workbench.
2. Removefour (Y99-47-C) cap screws and pull the air motor from the
lower pump end until the motor piston rod is inthe “down” position
and the lower pump end rod is in the “up” position.
3. Removethe(Y15-31-C) cotter pin and (96064) pin, releasing the air
motor from the lower pump end.
Lower Pump Rod
Pump Motor Piston Rod
Cotter Pin Y15-31-C
PUMP CONNECTOR DETAIL
Figure 2
Pin 96064
REASSEMBLY
1. Assemblemotor piston rod to the lower pump end rod, aligning thru
holes.
2. Assemble(96064) pin through hole, securing rods.
3. Assemble(Y15-31-C) cotter pin through hole in pin.
4. Aligntie rods with holes in (96068) plate and pump outlet body.
5. Assemblefour (Y99-47-C) cap screws, securing air motor. NOTE:
Tighten cap screws to 50 in. lbs (5.65 Nm).