Справочник Пользователя для Ingersoll-Rand NM2304B-X-X

The two-ball design provides for easy priming of the lower foot 
valve. The double acting feature is standard in all ARO industrial 
pumps. Material is delivered to the pump discharge outlet on both 
the up and down stroke.
The motor is connected to the lower pump end with a spacer tube 
and solvent cup. This allows for lubrication of the upper packing 
gland and to prevent air motor contamination because of normal 
wear and eventual leakage through the material packing gland.

Pump ratio is an expression of the relationship between the pump motor area 
and the lower pump end area. EXAMPLE: When 150 p.s.i. (10.3 bar) inlet pressure 
is supplied to the motor of a 4:1 ratio pump, it will develop a maximum of 600 
p.s.i. (41.4 bar) fl uid pressure (at no fl ow) - as the fl uid control is opened, the fl ow 
rate will increase as the motor cycle rate increases to keep up with the demand.

NOTICE: Thermal expansion can occur when the fl uid in the mate-
rial lines is exposed to elevated temperatures. Example: Material 
lines located 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 re-
quest.

Pump problems can occur in either the air motor section or the 
lower pump end section. Use these basic guidelines to help deter-
mine which section is affected. Be sure to eliminate any possible 
non-pump problems before suspecting pump malfunction.
Pump will not cycle.

No pressure to the motor. See motor manual.
Restricted return lines. Clean obstruction.
Damaged motor. Service the motor.

Check the material supply, disconnect or shut off  the air supply 
and replenish the material, reconnect.

The lower check may not be seating in the foot valve (see lower 
pump disassembly). Remove the check from the foot valve, 
clean and inspect the valve seat area. If the check or foot valve 
are damaged, replace.

The middle packings may be worn (see lower pump disassem-
bly). Replace the seals as necessary.

Tighten the solvent cup until leakage discontinues. If this 
procedure does not aid in stopping the leakage problem, the 
upper packings may be worn (see lower pump disassembly). 
Replace the seals as necessary.

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Loosen (90606) lock nut and unscrew the entire pump from 
the air motor. This will expose (94445) adapter (see fi gure 2).
Unscrew (94445) adapter to remove pump assembly from the 
air motor.
Remove the (Y15-21) cotter pin and (94048) clevis pin to re-
move (94445) adapter.

Assemble (94445) adapter to the air motor rod, aligning the 
through holes.
Assemble (94048) clevis pin through hole, securing adapter.
Assemble (Y15-21) cotter pin through the hole in the clevis 
pin.
Apply Loctite® 242 to threads of (94445) adapter and screw 
(94445) adapter into (90615-X) plunger.
Screw the lower pump assembly to the air motor.
Screw (90606) lock nut against the air motor base and tighten 
to 50 - 60 ft. lbs (67.8 - 81.3 Nm).

1.

2.

3.

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2.
3.

4.

5.
6.

1 -  Universal (stub) 

C -  UHMW-PE (upper and lower)

4 -  55 Gallon 

W - Viton® (upper) / Virgin PTFE (lower)

 

 

3 -  Virgin PTFE (upper and lower)

1 -  Coil 

1 -  Standard (300 series stainless steel)

  

B 

- 

Ceramic

y Viton® is registered trademarks the DuPont Company y
y ARO® is a registered trademark of Ingersoll-Rand y
y Loctite® is a registered trademark of Henkel Loctite Corporation y