Description
Greasing dozens of dry suspension bushings, tractor kingpins, and conveyor bearings with manual hand guns causes severe forearm cramps. The Porter Cable Air Grease Gun pumps heavy grease under continuous pressure with a simple trigger pull. Fleet maintenance crews speed through lube racks, yet contaminated grease cartridges will jam the internal piston spool valve immediately.
A heavy cast aluminum pump head houses an air-powered reciprocating piston that drives a precision-ground steel hydraulic plunger. The pneumatic motor wet-end features nitrile lip seals that cycle compressed air automatically without manual valve resets. High-pressure ball check valves seated against hardened steel faces prevent lubricant backflow under line backpressure. The cold-rolled steel barrel accepts standard 14-ounce grease cartridges or bulk fill grease, while an ergonomic pistol grip balances tool weight across extended chassis greasing runs.
Field Hardware Performance Matrix
Fleet vehicle service bays and industrial machinery plants demand continuous-cycle pneumatic grease guns built with reinforced hydraulic components. The technical parameters below define the internal build of this commercial grease delivery tool.
- Delivers up to 6000 PSI discharge grease pressure to clear clogged suspension bushings and zerks
- Continuous-cycle air piston dispenses steady grease flow while holding the trigger down
- Precision-ground steel plunger delivers consistent lubricant volume across varying line pressures
- Heavy-gauge cold-rolled steel grease barrel resists denting from job site drops and bench impacts
- Four-jaw high-pressure coupler snaps tight onto standard grease fittings to prevent grease blowout
- Air bleeder valve purges trapped air pockets fast to restore hydraulic prime after cartridge swaps
- Screened 1/4-inch NPT air inlet stops coarse pipe scale from entering the pneumatic valve spool
Dyno Bench Load Telemetry
Dynamic flow testing logs 4.2 CFM air consumption at 90 PSI dynamic under continuous trigger engagement. Supplying air across fifty feet of 3/8-inch shop hose creates a 7 PSI dynamic line pressure drop. Adiabatic expansion cools the handle exhaust to 33°F during prolonged chassis greasing passes. The pneumatic intensifier piston develops 4800 PSI operating delivery pressure, generating an acoustic sound exposure of 82 dBA.
Field Service Operational Directives
Loading grease cartridges contaminated with dirt or metal shavings will score the hydraulic plunger and ruin internal seals. Small garage compressors lacking water traps will introduce moisture that corrodes the pneumatic valve spool. Do not yank on the flexible delivery hose to free stuck couplers. Fleet service technicians must enforce these three maintenance rules.
- Inject three drops of ISO VG 32 pneumatic lubricant into the inlet fitting before every work shift
- Wipe the four-jaw grease coupler clean of dirt and road grit before snapping onto grease zerks
- Open the air bleeder valve during cartridge installation to purge air bubbles and maintain prime
Commercial Warranty Package Inventory
Porter Cable backs this air grease gun with a 1-Year limited warranty covering defective parts and factory assembly errors. The unboxing package contains the continuous-cycle air grease gun, a flexible high-pressure delivery hose, a rigid steel extension pipe, a four-jaw coupler, and an operational service manual.