American Lube LM2203A-11C Aro “Thunder” 3:1 ratio oil pump


ARO Thunder Oil Pumps

Reliable Design – Thunder pumps feature a patented, ice-free air motor contained in a rugged housing that is designed to withstand the harshest working environments. ARO is so confident in this design that it is backed by a 5-year warranty.

Lube-Free Air Motor – The air valves and the piston are pre-lubricated. Thunder pumps do not require an air line lubricator.

No Mechanical Assist – Thunder's patented valve design uses no trip rods, push pins, or springs. Instead of one mechanical pilot valve in the air motor, Thunder has two independent 3-way spool valves which work together to change the direction of the pump piston.

In-Line Service – Thunder pumps can be serviced in the tank or drum using just a standard wrench.

Fewer Parts – Thunder pumps are constructed with 50% fewer parts than the majority of comparable pumps. Fewer parts means less problems.

Cost-Effective Design – Most competitive pumps are too costly to repair after their warranty expires. Thunder's revolutionary design, inexpensive rebuild kits, and field serviceability all add up to a pump that has the lowest cost of ownership in the lubrication equipment market.

Fluid Compatibility – Thunder oil pumps are compatible with the following fluids: automatic transmission fluid, gear oil, hydraulic oil, motor oil and synthetic oil.

SKU: AML LM2203A-11C Categories: ,


3:1 Specifications

Air Motor Diameter….2″
Air Inlet………….1/4″ (f)
Fluid Outlet……….1/2″ (f)
Fluid Inlet (stub)….3/4″ (f)
Free Flow Rating……9 GPM
Working Flow Rating…6 GPM
Air Inlet Pressure….0-150 PSI
Cycles per Gallon…..37
Noise Level @100 PSI..80 db
Rebuild Kit Part Number…637224

Additional information

Weight 18 lbs
Dimensions 24 × 5 × 5 in


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