ARO ARO 66M3X0-XXX-C Operator'S Manual Download Page 8

Page 8 of 8 

66M3X0-XXX-C (en)

PN 97999-1398

C

A

B

D

E

F

J

H

G

L -

 Material outlet 

M - 

Exhaust port

K - 

Air inlet

TROUBLE SHOOTING

Product discharged from exhaust outlet.

Check for diaphragm rupture.
Check tightness of (14) diaphragm screw.

Air bubbles in product discharge.

Check connections of suction plumbing.
Check “O” rings between intake manifold and fl uid caps.
Check tightness of (14) diaphragm screw.

y

y

y

y

y

Low output volume, erratic fl ow or no fl ow.

Check air supply.
Check for plugged outlet hose.
Check for kinked (restrictive) outlet material hose.
Check for kinked (restrictive) or collapsed inlet material hose.
Check for pump cavitation - suction pipe should be sized at 
least as large as the inlet thread diameter of the pump for 
proper fl ow if high viscosity fl uids are being pumped. Suction 
hose must be a non-collapsing type, capable of pulling a high 
volume.
Check all joints on the inlet manifolds and suction connections. 
These must be air tight.
Inspect the pump for solid objects lodged in the diaphragm 
chamber or the seat area.

y

y

y

y

y

y

y

DIMENSIONAL DATA

Dimensions shown are for reference only, they are displayed in inches and millimeters (mm).

Figure 5

DIMENSIONS

A  -  22-7/32” (563.9 mm)
B  -  26-13/16” (680.3 mm)
C  -  11-1/8” (281.9 mm)
D  -  2-3/4” (69.9 mm)

E  -  16” (406.4 mm)
F  -  11” (279.4 mm)
G  -  32-5/8” (828.4 mm)
H  -  30-11/32” (770.7 mm)

J  -  18-25/32” (476.8 mm)
K  -  3/4 - 14 NPTF - 2
L - see below
M -  1-1/4 - 11-1/2 NPTF - 2

 “L”

66M300-XXX-C 

3 - 8 NPTF - 2

66M320-XXX-C 

Rp 3 (3 - 11 BSP, parallel)

Summary of Contents for ARO 66M3X0-XXX-C

Page 1: ...mumTemperature Limits diaphragm ball seal material E P R EPDM 60 to 280 F 51 to 138 C Hytrel 20 to 150 F 29 to 66 C Nitrile 10 to 180 F 12 to 82 C Santoprene 40 to 225 F 40 to 107 C PTFE 40 to 225 F 4 to 107 C Viton 40 to 350 F 40 to 177 C Dimensional Data see page 8 Noise Level 70 p s i 60 c p m c 86 3 db A d Noise Level 70 p s i 60 c p m e 108 7 db A d c Tested with 94810 muffler assembly instal...

Page 2: ...AND SAFETY PRECAUTIONS READ UNDERSTAND AND FOLLOWTHIS INFORMATIONTO AVOID INJURY AND PROPERTY DAMAGE jury or property damage Do not attempt to return a pump to the factory or service center that contains hazardous material Safe handling practices must comply with local and national laws and safety code requirements Obtain Material Safety Data Sheets on all materials from the supplier for proper ha...

Page 3: ...ing the diaphragms Re check torque settings after the pump has been re started and run a while y y y y y 1 2 3 y y y y y y GENERAL DESCRIPTION The ARO diaphragm pump offers high volume delivery even at low air pressure and a broad range of material compatibility options are available Refer to the model and option chart ARO pumps feature stall resistant design modular air motor fluid sections Air o...

Page 4: ...210 2 B Y325 350 4 B XX9 637467 X9 96475 C 2 H Y327 210 2 V Y327 350 4 V XXB 637467 XB 96475 A 2 Sp Y328 210 2 T 94115 4 E COMMON PARTS Item Description size Qty Part No Mtl o 1 Rod 1 97070 C n 2 O Ring 3 32 x 1 o d 1 Y330 117 B 5 Washer air side 2 94831 1 C o 6 Washer fluid side 2 94802 A 9 Washer 13 16 i d x 2 o d x 5 32 2 Y13 12 T SS 14 Screw 3 4 16 x 3 1 4 2 Y5 134 T SS 15 Fluid Cap 2 96430 A ...

Page 5: ...70 ft lbs 88 1 94 9 Nm 26 screw 60 70 ft lbs 81 3 94 9 Nm 27 screw 60 70 ft lbs 81 3 94 9 Nm LUBRICATION SEALANTS c Apply Key Lube grease to all O rings U cups and mating parts d Apply Loctite 271 to threads PARTS LIST 66M3X0 XXX C FLUID SECTION FORTHE AIR MO TOR SECTION SEE PAGES 6 7 Figure 2 COLOR CODE Diaphragm Ball Material Color Color Hytrel Cream Cream Nitrile Black Red Santoprene Tan Tan Do...

Page 6: ...d 113 O ring onto 115 spacer and insert etc NOTE Be careful to orient spacer legs away from blocking internal ports Lubricate and carefully insert 111 spool Install 117 gasket and 107 plate Lubricate and install 110 packing cup and insert 109 piston into air inlet side cavity The 110 packing cup lips should point outward Install 108 gasket and replace 107 1 2 3 4 1 2 3 1 2 3 4 5 PARTS LIST 66M3X0 ...

Page 7: ...N FASTENERS 105 screw 40 50 in lbs 4 5 5 6 Nm 123 screw 20 25 in lbs 2 3 2 8 Nm LUBRICATION SEALANTS c Apply Key Lube grease to all O rings U cups and mating parts d Apply Loctite 271 to threads f Apply Loctite 262 to threads g Apply Loctite 572 to threads MAJOR VALVE See cross section detail figure 4 LEGS IMPORTANT BE CERTAINTO ORIENT 115 SPACER LEGS AWAY FROM BLOCK ING INTERNAL PORTSWHEN REASSEM...

Page 8: ... cavitation suction pipe should be sized at least as large as the inlet thread diameter of the pump for proper flow if high viscosity fluids are being pumped Suction hose must be a non collapsing type capable of pulling a high volume Check all joints on the inlet manifolds and suction connections These must be air tight Inspect the pump for solid objects lodged in the diaphragm chamber or the seat...

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