ARO 650888 Series Manual do operador - Página 2

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650888- X X X

Packing Material

Spring Arrangement

GENERAL DESCRIPTION

The chop-check pumps are primarily designed for the pumping of

heavy viscous material with or without fi brous content. The models

can be used with a gravity feed single post lift as a topper type

assembly or with a two post lift as a force feed type assembly. The

lower pump is designed for easy priming and 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 fi lled with lubricant to protect the upper packings and

insure longest service life.

HAZARDOUS PRESSURE. Do not exceed maxi-

WARNING

mum operating pressure of 3360 p.s.i. (231.7 bar) at 120

p.s.i. (8.3 bar) inlet air pressure.

Pump Ratio X

Inlet Pressure to Pump Motor

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.

Refer to general information sheet for additional

WARNING

safety precautions and important information.

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 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 aff ected.

Pump will not cycle.

Be 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.

Refer to the motor manual for trouble shooting if the pump

does not cycle and / or air leaks from the air motor.

Damaged motor. Service the motor.

Pump cycles but does not deliver material.

Refer to the lower pump end manual for further trouble shoot-

ing.

Page 2 of 2

PUMP OPTION DESCRIPTION CHART

PACKING MATERIAL

C - UHMW-PE

SPRING ARRANGEMENT

3 - No spring

4 - Multiple wave spring

Plunger Type

Maximum Pump

Fluid Pressure

(Packings are upper and lower unless noted)

J - Polyurethane (upper)

UHMW-PE (lower)

PLUNGER TYPE

D - Hard stainless steel with hard chrome plating

PUMP CONNECTION - UPPER / LOWER

NOTE: All threads are right hand.

Lay the pump assembly on a work bench.

Remove the three (Y6-128-C) cap screws and (Y14-750-K) lock

washers from the three spacer rods (see fi gure 1).

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.

Remove the three spacer rods by removing the three (Y6-

128-C) cap screws and (Y14-750-K) lock washers.

Using e-ring pliers, slide the "e" ring up far enough to allow the

sleeve to move upward and release the two connectors (see

fi gure 2).

PUMP CONNECTION DETAIL

REASSEMBLY

Align the pump motor with the lower pump end. Position the

air inlet of the motor 90° from the material outlet.

Install the two connectors (94688) and retain with the sleeve

(94689). Slide the "e" ring (95069) back into position.

Assemble the three spacer rods (93866) to the lower pump

and secure using three (Y14-750-K) lock washers and (Y6-

128-C) cap screws.

Reinstall the spacer rods to the pump motor.

Bring the motor and lower pump together and retain with

three (Y14-750-K) lock washers and (Y6-128-C) cap screws.

Pump Motor Piston Rod

95069 "E" Ring

94688 Connector (2)

94689 Sleeve

Lower Pump Piston Rod

Figure 2

PN 97999-977

650888-XXX (en)