OPERATING PROCEDURES
ξThe 9:1 ratio is an expression of the relationship between the effec- tive air motor area and the effective lower pump area. When 120 PSI (10 bar) of air pressure is supplied to the air motor, the lower pump end will develop a maximum of 1,350 PSI (93 bar) of fluid pressure (at no flow) as the fluid control is opened, the flow rate will increase as the air motor cycle rate increases to keep up with the demand.
ξFlush system. This pump has been tested in kerosene and a small amount remains in the pump end. Kerosene must be flushed from the pump before using. To flush system:
ξGun or dispensing device should be removed.
ξImmerse fluid or suction hose in a 5 gallon pail of compatible solvent.
ξPlace material outlet hose into pail.
ξRegulate air pressure to a few pounds.
ξConnect air supply to air motor inlet.
ξAllow pump to cycle slowly and circulate solvent for awhile.
ξDisconnect air supply.
ξTo Prime System:
ξInstall gun or dispensing device to material outlet hose.
ξA shut-off valve located on the cart should be in the “off” position (handle perpendicular to valve body). Connect air line to connector (See figure 1).
ξWith air line connected to connector, the lift assembly and pump will rise.
ξOnce lift assembly and pump are in the “up” position, place and cen- ter opened 5 gallon pail of material under follower plate (5).
ξRemove vent plug from follower plate (5). Trapped air must be re- moved from beneath the follower plate.
ξDisconnect the main air line to the connector and allow pump and lift assembly to lower into 5 gallon pail of material. Once the follower plate (5) begins to force material out of the vent plug, reseat bleed plug.
ξOnce the follower has been properly seated, prior to pumping, be sure the thumb screws on the cart are tightened to secure 5 gallon pail. Pail must be locked in place with thumb screws before the fol- lower plate can be removed from 5 gallon pail.
ξDjustment knob on air regulator (1) should be turned counter-clock- wise until it turns free to prevent overpressurizing the pump.
ξConnect air line to air regulator (1). Adjust knob on the air regulator
(1)until pump begins to cycle.
ξTrigger (13) gun to prime pump with material.
ξIf pump does not stop or material does not flow from dispensing valve, refer to Troubleshooting Section of this manual.
DAILY MAINTENANCE
ξLack of or an excessive amount of lubeication will affect the perfor- mance and life of this pump. Use only recommended lubricants.
ξDAILY - Fill air line lubricator reservoir with SAE NO. 90W non-deter- gent gear oil.
ξIf pump is to be inoperative for more than a few hours at a time, dis- connect air supply and relieve all pressure from the system.
ξThis manual covers the basic pump unit. The 4-1/4” air motor is com- pletely separate from the lower pump end. This helps to keep the air motor from being contaminated by material being pumped.
ξPeriodically flush entire pump system with a solvent that is compat- ible with the material being pumped.
ξKeep solvent cup filled with this compatible solvent. This will keep material from drying on the piston rod, which would drag thru the packings, ruin them and eventually scour the piston rod.
ξRefer to Disassembly Procedures of air motor for correct break down.
ξDisassembly should be done on a clean work bench with clean cloths to keep parts clean.
ξIf replacement parts are necessary, consult drawing containing parts for identification.
ξBefore assembling, lubricate parts where required. When assem- bling “O” rings or parts adjacent to “O” rings, care must be exercised to prevent damage to “O” rings and “O” ring groove surfaces.
MAINTENANCE
ξWhen the following instructions are observed, heavy paste materi- als can be pumped directly from their original 5 gallon pail without air inclusion, or excessive waste. The follower plate creates an air tight seal as well as clean-wiping action in its progressive downward movement into the pail.
ξLubricate lower follower wiper plate seal with any type grease (sili- cone, vaseline, gear, etc.). This ensures a smooth fit into the pail as well as prevents curing type compounds from bonding to the seal.
ξCheck vent plug to be sure it easily threads in and out. It is recom- mended to lubricate the threads of the plug to help prevent possible set up of compound at this point. See 65184X-X Operator’s Manual.
TO CHANGE THE PAIL
ξTurn knob on pump air regulator (1) counter-clockwise to turn air “off” to pump.
ξTurn shut-off control valve to “ON” position (Handle parallel with body) to apply pressure under follower plate.
ξDisconect main air line from pump air regulator (1) and connect to air line connector on cart.
ξAllow pump and lift assembly to clear the top of the 5 gallon pail of material.
ξTurn shut-off controll valve tp “OFF” postition. (Handle perpendicu- lar to valve body).
ξUnscrew thumb screws. Remove empty pail of material and replace with a new pail of material.
ξSecure new pail of material with thumb screws. Remove vent plug from follower plate (5).
ξDisconnect main air line from connector and allow lift assembly to lower into new 5 gallon pail of material. Once the (5) follower plate begins to force material out of the vent plug, reseat bleed plug.
TROUBLESHOOTING
ξMalfunctions beyond the scope of this manual should be brought to the attention of your ARO Representative.
ξPROBLEM
-Cause, Solution
ξNo material coming from extrusion nozzle - Obstructed Material, Remove tip and clean
- Obstructed Hose, Remove control handle and cycle pump until hose is clear
- Obstructed Control Handle, Disassemble control handle and clean
