Originally Posted by
supcom
Spray a small amount of silicone lubricant inside the barrel of the pump to lubricate the plunger. Do not use oil-based lubricants, including WD-40 type of products. Hot compressed air and flammable lubricants are not a good combination.
You do know that real air compressors, which produce huge volumes of air at 175 PSI, and produce enough heat they can melt solder on copper air pipes, use petroleum oils for lubrication, right? No way you're going to get a hand-operated pump hot enough to catch on fire, unless you're superman.