I used the gun less than eight times over a nine month period and it quit pumping grease. Purged for air pocket and still didn't work. Sent e-mail to address on gun and received no reply. Returned to the store(not Sears) and they were informed by the mfg. that the gun only had a 90 day warranty and no parts for sale which translates to a throw away purchase.
Ingersoll-Rand Air Operated Grease Gun is not recommended by oldog
Designed for dependability and convenience. Features a comfort grip plunger and 360-degree swivel handle. Offers three-way grease loading, 6,000 max psi pressure, and a durable motor with a 40:1 output ratio. Model 5180G Wt. 7.5 lbs.