GENERAL DESCRIPTION
The
The motor is connected to the lower pump end by 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. 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 1350 p.s.i. (93.1 bar) at 150 p.s.i. (10.3 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
Replacement warning label (pn 92325) is available upon re- quest.
PUMP CONNECTION - UPPER / LOWER
DISASSEMBLY
NOTE: All threads are right hand.
1.Loosen the (90571) lock nut and unscrew the entire pump from the air motor. This will expose the (6) connector pin (see figure 2).
2.Remove the (5) retaining ring and (6) connector pin to release the air motor piston rod from the lower pump piston rod.
3.Remove (4) spacer, (2) washer, four (3) packings, (2) washer and
(1) wavy spring washer from the air motor cavity (see figure 2).
65968 Adapter Kit Assembly
1
2 | 3 |
4
6
5
Figure 2
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. Be sure to eliminate any possible
Pump will not cycle.
yNo pressure to the motor. See motor manual.
yRestricted return lines. Clean restriction.
yDamaged motor. Service the motor.
No material at the outlet (pump continually cycles).
yCheck the material supply, disconnect or shut off the air supply and replenish the material, reconnect.
Material on one stroke only (fast downstroke).
yThe 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 check or foot valve are damaged, replace.
Material on one stroke only (fast downstroke).
yThe middle packings may be worn (see lower pump disassem- bly). Replace the seals as necessary.
Material leakage out of the solvent cup or material appears on the pump plunger rod.
yTighten the solvent cup until the 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.
PARTS LIST
Item | Description (size) | Qty | Part No. |
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1 | Wavy Spring Washer | (1) | 90251 |
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2 | Washer | (2) | 90568 |
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|
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3 | Packing | (4) | 90567 |
4 | Spacer | (1) | 90570 |
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|
|
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5 | Retaining Ring | (1) | |
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|
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6 | Connector Pin | (1) | 90572 |
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REASSEMBLY
1.Assemble (1) wavy spring washer, (2) washer, four (3) packings,
(2)washer and (4) spacer into cavity in the air motor.
2.Assemble the lower pump piston rod to the air motor piston rod, aligning the through holes.
3.Assemble the (6) connector pin through the hole, securing with
(5)retaining ring.
4.Screw the lower pump assembly to the air motor.
5.Screw the (90571) lock nut against the air motor base and tighten.
y ARO® is a registered trademark of
PN
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