Graco DutyMax GH300 Hydraulic Motor & Displacement Pump Parts
When you run a 9 hp Honda-powered Graco DutyMax GH 300 through 1,000 gallons of elastomeric a week, inferior seals or off-spec cylinders are a recipe for callbacks and downtime. Graco’s factory-machined hydraulic motor kits and MaxLife™ displacement pumps use oversized fluid passages and ceramic check balls that last six times longer between repacks compared with budget copies. Each kit ships with O-rings rated to 6,750 psi and ISO-46 hydraulic-oil compatibility so you can crank the pump to its full 3 gpm, 3,300 psi output without wondering when the rod wiper will weep.
- MaxLife piston coating reduces packing wear up to 200 %
- One-minute ProConnect™ swap cuts field repair time to virtually zero
- O-ring-sealed 37° JIC fittings eliminate hydraulic drips common on legacy units
Compatible Graco Hydraulic Sprayers & Pump Assemblies
These OEM parts bolt directly onto the following workhorses without modification:
- DutyMax GH 300 ProContractor, Standard & HD Series (P/N 24W935, 24W936, 24W968)
- GH 230 Standard & ProContractor models—identical hydraulic stack, shared 248977 motor kit
- Earlier GH 200 and EH 200 hydraulic sprayers using sleeve kit 246176 or 248991
- Endurance MaxLife pump P/N 24W998 (drop-in for GH 230/300)
Looking for electric rigs? Our Graco Magnum X7 pump packages share tip guards, gun filters, and Prime valves with the GH 300, making mixed fleets easier to stock.
Key GH300 Hydraulic Motor & Pump Features
High-Efficiency Hydraulic Motor : Fewer moving parts, faster spool shift, and form-fitted lines mean cooler oil, lower amp draw on electric conversions, and nearly vibration-free strokes.
Endurance MaxLife™ Displacement Pump: Chromex-hardened rod and oversized inlet seat sustain heavy-bodied acrylics, block-fillers, even 100-mesh intumescents. Oversized passages maintain high-velocity flow for up to 300 ft of BlueMax II™ hose with no dead-band lag.
Quick-Read Service Indicators
Pop-up pack-off indicator and color-coded rod-lubricant windows take the guesswork out of preventive maintenance.
Top-Selling Related Components
- 24M725 Check-Valve Kit – ceramic ball plus Viton seat for solvent or waterborne compatibility
- 246174 Seal Kit – fits second & third-gen GH230/GH300 (swap in under 20 min)
- RAC X™ Spray Tip Guards – protects tips up to 0.057 in while reducing finger fatigue
- Contractor PC™ Spray Gun Accessories – rebuild needle in five minutes with 287032 kit
- Graco 395 Paint Sprayer Guard – shares the same bayonet-style lock, ideal for crews running 395 electrics beside a GH 300 trailer pump
Logistics Built for Job-Site Reality
In Stock Qualified Orders placed and confirmed before 12leave Graco warehouse the same day.
Maintenance Hacks from Our Shop Floor
- Track hours, not weeks. Log pack-off lube shots every 50 hours; swap seal kits every 750–1,000 hours for predictable uptime.
- Pre-stage spares. Keep a 248977 hydraulic motor kit and 24W998 pump lower in a drop crate; field crews can hot-swap in under 10 minutes—less than mixing a second batch of elastomeric.
- Color-code bins. Use red for graco spray gun accessories, blue for graco paint sprayer 395 consumables so night shifts pull the right parts fast.
- Flush smarter. Finish each day with Pump Armor®, not plain water, to prevent corrosion inside the MaxLife cylinder and the GH 300’s tapered reservoir.
Ready to crush tomorrow’s deadlines? Click “Add to Cart,” choose your shipping speed, and our team will do the rest. Your Graco DutyMax GH 300 will be back to 3300 psi before the crew’s first coffee break.