Sullivan-Palatek D185
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Overview
The Sullivan-Palatek D185 is a 185 CFM tow-behind portable rotary screw air compressor commonly used in construction, sandblasting, paving, utility work, rental fleets, and mobile service applications.
This page is built to help you find common Sullivan-Palatek D185 replacement parts, including air filters, oil filters, fuel filters, air/oil separators, compressor oil, fuel/water separators, couplings, senders, switches, hoses, valves, kits, and fan-related parts.
D185 parts can vary by model code, serial number, engine brand, production generation, and emissions configuration. Before ordering, confirm your full model number, serial number, engine brand, and any visible part number from the component already installed on your machine.
For deeper identification, maintenance, and troubleshooting information, visit our Sullivan-Palatek D185 Resource Center.
Disclaimer: Parts may vary by model, serial number, and year of manufacture. Please confirm compatibility using your unit’s manual or by verifying the part currently installed before placing an order. ACS cannot be held responsible for incorrect part selections. Returns are not guaranteed and will only be considered for unused, unopened items in original condition per our return policy.
D185 Guides and Resources
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Sullivan-Palatek D185 FAQs
Why is my D185 not building pressure?
Low pressure is often caused by restriction, blowdown valve issues, minimum pressure valve behavior, or control system response. For a deeper breakdown, see our D185 not building pressure guide.
Why does my D185 keep shutting down?
Shutdowns are commonly caused by high discharge temperature, cooling system restriction, sensor inputs, or Tier 4 protection logic. Start with our D185 shutting down guide or the D185 Tier 4 shutdown and derate guide.
What causes oil in the air lines on a D185?
Oil carryover is typically caused by separator restriction, oil return issues, incorrect oil level, or oil system imbalance. See our D185 excessive oil carryover guide and D185 oil system explained.
What does engine lugging mean on a D185?
Engine lugging usually indicates increased load inside the compressor system. This can be related to restriction, separator condition, oil flow, or control response. See our D185 engine lugging under load guide.
Do I need to confirm my serial number before ordering parts?
Yes. Serial number breakpoints can affect separator assemblies, cooling components, engine parts, and electrical connections. See our D185 serial number breakpoints guide before ordering if fitment is uncertain.
What is the difference between mechanical and Tier 4 D185 models?
Mechanical models rely more heavily on pneumatic control systems. Tier 4 models include electronic monitoring, sensors, and engine protection logic that can trigger derates or shutdowns. For more detail, see our D185 Tier 4 shutdown and derate guide.