Keeping your Graco transfer pumps in top shape means more uptime and smoother spray jobs. Since these pumps are a critical part of spray foam equipment, regular rebuilds help restore performance and extend pump life. Whether you’re running a T1, T2, T3, T4, or even an electric model, these steps ensure your spray foam equipment keeps running reliably.
Graco T1 Transfer Pump
Graco T1 Transfer Pump Rebuild Steps
To begin, make sure the system pressure is relieved and all lines are disconnected. After that, remove the suction tube and carefully inspect the seals. If they show wear, replace both the upper (247958) and lower (24K363) seal kits. Once everything is replaced, reassemble the pump and tighten hardware evenly to prevent leaks. Proper upkeep of this pump extends the life of your spray foam equipment.
Graco T1 Pump Tips, Tricks, & Things to Remember
- Tip: Always replace both seal kits at the same time since mixing old and new seals causes premature failure.
- Trick: When loosening bolts, place a rag between parts to keep alignment steady.
- Thing to remember: During reassembly, keep A and B materials separated to avoid cross-contamination in your spray foam equipment.
Graco T2 Transfer Pump
Graco T2 Transfer Pump Rebuild Steps
Start by shutting off air and bleeding pressure from the system. Once pressure is safely released, disassemble the air motor and the fluid section. At this point, install the complete rebuild kit (24X056) to refresh seals and fittings. Finally, reassemble the pump, tightening hardware to the proper torque values of 30–35 ft-lb for Series C models. These steps help keep spray foam equipment reliable on every job.
Graco T2 Pump Tips, Tricks, & Things to Remember
- Tip: Use the upgraded seal kit design for longer performance.
- Trick: If the pump cycle feels sluggish, the reversing spring may be worn and needs replacement.
- Thing to remember: Replacing clevis pins during a rebuild results in smoother operation for spray foam equipment.
Graco T3 Transfer Pump
Graco T3 Transfer Pump Rebuild Steps
First, disconnect the drum connections and bleed all pressure from the system. Then, inspect the shaft and piston rod for wear or scoring. If needed, replace the piston seal and lower packings with the correct rebuild kit. Once parts are replaced, reinstall the suction tube and test the stroke reset for smooth motion. Regular care of this pump will improve the overall performance of your spray foam equipment.
Graco T3 Pump Tips, Tricks, & Things to Remember
- Tip: Lower air consumption means the air motor must stay clean for consistent performance.
- Trick: Air hissing during idle is often caused by a worn piston seal, so check it first.
- Thing to remember: The T3 uses fewer moving parts, which makes rebuilds quicker; however, regular cleaning is essential for spray foam equipment longevity.
Graco T4 Transfer Pump
Graco T4 Transfer Pump Rebuild Steps
Begin by depressurizing the pump and disconnecting the air supply. Next, remove the upper housing and fluid tube with care. At this stage, replace the rod and seal kit while paying close attention to o-ring orientation. Finally, reassemble and balance torque across components to avoid uneven wear. This process ensures your spray foam equipment delivers consistent results.
Graco T4 Pump Tips, Tricks, & Things to Remember
- Tip: Apply Graco-approved grease to the larger shaft to reduce friction.
- Trick: If the pump pulses unevenly, worn lower packings are usually the cause.
- Thing to remember: Because the T4 moves higher volumes, rebuild intervals may be shorter; scheduling them prevents spray foam equipment downtime.
Graco Electric Transfer Pump
Graco Electric Transfer Pump Rebuild Steps
Before touching the pump, disconnect the power supply for safety. Next, replace seals and check valves using the correct electric pump rebuild kit. After installation, test motor function and reseal the housing carefully to prevent leaks. By maintaining this pump, you ensure spray foam equipment stays dependable in any setting.
Graco Electric Pump Tips, Tricks, & Things to Remember
- Tip: Always keep electrical components dry during rebuilds.
- Trick: If pressure fluctuates, inspect wiring connections in addition to seals.
- Thing to remember: Electric pumps require less maintenance overall, but lubrication remains essential for long-lasting spray foam equipment.
General Graco Transfer Pump Care
Proper maintenance of transfer pumps is one of the best ways to extend the life of your spray foam equipment. Flush pumps with approved solvents such as Dynasolve CU-6 or ISO Neutralizer after every job. In addition, inspect springs, rods, and seals on a regular schedule. As a best practice, always use genuine Graco rebuild kits for safety and long-term performance in spray foam equipment.
About Spray Foam Systems
Spray Foam Systems is the #1 spray foam rig builder and spray foam equipment supplier in the United States. Family-owned and proudly serving the industry since 2007, we operate from a 7-acre campus with over 80,000 square feet of dedicated working space in Greensboro, GA. With over 10,000 customers served over the last 18 years, we specialize in delivering high-quality turnkey spray foam systems, distributing top-tier equipment and supplies, and providing nationwide service and training to help contractors grow and succeed in the spray foam insulation and roofing markets.