Pump Option Description Chart

650840- X 4 G - B

Packing Material

Spring Arrangement

Plunger Type

PACKING MATERIAL (Packings are upper and lower unless noted)

7 -	Glass filled PTFE (upper)	P -	UHMW-PE / Glass filled PTFE staggered (upper)
	Virgin PTFE (lower)		UHMW-PE (lower)
C - UHMW-PE		R -	Glass filled PTFE / UHMW-PE staggered (upper)
F -	UHMW-PE / Leather staggered (upper)		Virgin PTFE (lower)
	UHMW-PE (lower)

SPRING ARRANGEMENT	PLUNGER TYPE
4 - Multiple wave spring	G - Hardened stainless steel with ceramic coating

GENERAL DESCRIPTION

PUMP CONNECTION - UPPER / LOWER

The four-ball pumps are primarily designed for the high volume transfer of light and medium viscosity fluids. Stainless steel con- struction offers compatibility with a wide range of fluids. The lower pump is designed for easy priming. 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 by a spacer section. This allows for lubrication of the upper packing gland and prevents motor contamination because of normal wear and eventual leak- age through the material packing gland. Be sure the solvent cup is adequately filled with lubricant to protect the upper packings and insure longest service life.

WARNING HAZARDOUS PRESSURE. Do not exceed maxi- mum operating pressure of 702 p.s.i. (48.4 bar) at 120 p.s.i. (8.3 bar) inlet air pressure.

Pump Ratio X	=	Maximum Pump
Inlet Pressure to Pump Motor		Fluid Pressure

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) fluid pressure (at no flow) - as the fluid control is opened, the flow rate will increase as the motor cycle rate increases to keep up with the demand.

WARNING Refer to general information sheet for additional safety precautions and important information.

NOTICE: Thermal expansion can occur when the fluid 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 92325) is available upon re- quest.

TROUBLE SHOOTING

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.

Pump will not cycle.

yBe certain to first check for non-pump problems including kinked, restrictive or plugged inlet / outlet hose or dispensing device. Depressurize the pump system and clean out any ob- structions in the inlet / outlet material lines.

yRefer to the motor manual for trouble shooting if the pump does not cycle and / or air leaks from the air motor.

yDamaged motor. Service the motor.

Pump cycles but does not deliver material.

yRefer to the lower pump end manual for further trouble shoot- ing.

NOTE: All threads are right hand.

1.Lay the pump assembly on a work bench.

2.Remove the three (Y85-29-C) nuts from the three spacer rods (see figure 1).

3.Pull the air motor from the lower pump end until the motor piston rod is in the “down” position and the lower pump end rod is in the “up” position.

4.Using e-ring pliers, slide the “e” ring up far enough to allow the sleeve to move upward and release the two connectors (see figure 2).

PUMP CONNECTION DETAIL

Pump Motor Piston Rod

95069 “E” Ring

94688 Connector (2)

94689 Sleeve

Lower Pump Piston Rod

Figure 2

REASSEMBLY

1.Align the pump motor with the lower pump end. Position the air inlet of the motor 45° from the material outlet.

2.Install the two (94688) connectors and retain with the (94689) sleeve. Slide the (95069) “e” ring back into position.

3.Reinstall the spacer rods to the pump motor.

4.Bring the motor and lower pump together and retain with three (Y85-29-C) nuts.

y ARO® is a registered trademark of Ingersoll-Rand y

PN 97999-872

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650840-XXX-B (en)