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OPERATOR’S MANUAL 650718-C
RELEASED: 8-11-03
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
REVISED: 12-2-10
(REV. 08)
1-1/2" DIAPHRAGM PUMP
U.L. LISTED, 1:1 RATIO, METALLIC
READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
It is the responsibility of the employer to place this information in the hands of the operator. Keep for future reference.
SERVICE KITS
637118-C for air section repair (see page 6).
637138-63 for fl uid section repair (see page 4).
PUMP
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OPERATING AND SAFETY PRECAUTIONS READ, UNDERSTAND AND FOLLOW THIS INFORMATION TO AVOID INJURY AND PROPERTY DAMAGE. let hose or piping from pump. EXCESSIVE AIR PRESSURE HAZARDOUS MATERIALS WARNING HAZARDOUS MATERIALS. Can cause serious STATIC SPARK HAZARDOUS PRESSURE injury or property damage. Do not attempt to return a pump to the factory or service center that contains hazardous material. Safe handling practices must WARNING EXCESSIVE AIR PRESSURE. Can cause per- comply with local and natio
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Notice that the material inlet / outlet manifolds may be GENERAL DESCRIPTION removed and rotated 180° to facilitate various mounting The ARO U.L. listed pump for pumping petroleum products, applications. offers high volume delivery even at low air pressures and If the body of the pump must be rotated, remove the end easy self-priming. This model is designed specifically for covers and manifolds and index it so the bolts line up transfer, bulk unloading or fueling applications. It includ
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PARTS LIST / 650718-C FLUID SECTION 637138-63 fl uid section service kits include: Balls (item 22), diaphragms (item 7) plus items 2, 3, 19 and 93706-1 Key-Lube grease (page 6). PARTS LIST Item Description (size) Qty Part No. [Mtl] Item Description (size) Qty Part No. [Mtl] (1/8” x 2-3/4” o.d.) 1 Rod (1) 98720-1 [C] 19 “O” Ring (4) Y327-230 [V] (3/32” x 1” o.d.) 2 “O” Ring (1) Y330-117 [B] 21 Seat (4) 92942 [K] 3 “O” Ring (1/16” x 3/4” o.d.) (4) Y327-16 [V] 22 Ball (1-3/4” diameter) (4) 92
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PARTS LIST / 650718-C FLUID SECTION 1 3 FOR THE AIR MO- 8 5 TOR SECTION, SEE PAGES 6 & 7. 10 9 6 7 4 2 81 Torque Sequence 16 26 29 1 2 3 5 7 3 14 22 19 21 15 59 27 Tab 6 9 22 21 19 16 32 26 Figure 2 ASSEMBLY TORQUE REQUIREMENTS NOTE: DO NOT OVERTIGHTEN FASTENERS. (14) Diaphragm screw, 65 - 70 ft. lbs (88.1 - 94.9 Nm). (26) Bolt, 240 - 280 in. lbs (27.1 - 31.6 Nm). (29) Nut, 120 - 140 in. lbs (13.6 - 15.8 Nm). LUBRICATION / SEALANTS Fluid side Air side Apply Key-Lub
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PARTS LIST / 650718-C AIR MOTOR SECTION Indicates parts included in 637118-C air section repair kit. AIR MOTOR PARTS LIST Item Description (size) (Qty) Part No. [Mtl] Item Description (size) (Qty) Part No. [Mtl] (includes items 195) 101 Motor Body (1) 93161 [A] 118 Pilot Rod (1) 93309-2 [C] (0.07” x 1.25” o.d.) (1/8” x 3/4” o.d.) 102 “O” Ring (2) 92960 [B] 119 “O” Ring (4) 93075 [U] 103 Sleeve (1) 94528 [D] 120 Spacer (3) 115959 [Z] (1-5/32 i.d.) 104 Retaining Ring (2) Y145-26 [C] 121 Sle
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PARTS LIST / 650718-C AIR MOTOR SECTION IMPORTANT BE CERTAIN TO ORIENT (115) SPACER LEGS AWAY FROM BLOCKING INTERNAL PORTS WHEN REASSEMBLING AIR SECTION. 111 115 116 105 114 117 113 107 112 MAJOR VALVE See cross section detail, fi gure 4. 101 Figure 3 195 104 123 195 121 43 102 196 103 104 105 107 126 119 PILOT VALVE 108 121 109 123 110 128 118 120 122 201 127 MAJOR VALVE CROSS SECTION DETAIL 109 110 112 114 115 113 111 116 ASSEMBLY TORQUE REQUIREMENT
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TROUBLE SHOOTING Product discharged from exhaust outlet. Low output volume, erratic fl ow or no fl ow. Check for diaphragm rupture. Check air supply. Check tightness of (14) diaphragm screw. Check for plugged outlet hose. Check for kinked (restrictive) outlet material hose. Air bubbles in product discharge. Check for kinked (restrictive) or collapsed inlet material Check connections of suction plumbing. hose. Check “O” rings between intake manifolds and fl uid caps. Check for pump cavita
