Doosan Portable Power Portable Diesel Screw (P185, HP450, XP825)

P185WDZ, HP450WCU, XP825WCU, HP1600WCU

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Doosan Portable Power Portable Diesel Screw (P185, HP450, XP825)

Trailer-mounted diesel-driven rotary screw compressors, 185–1,600 cfm, for construction and utility work.

Type
Portable diesel-driven screw
Power
49–475 hp (engine)
Flow
185–1,600 cfm
Pressure
100–200 psig (up to 350 psig on HP variants)
Cooling
air
Drive
direct
Lubrication
oil-flooded
Models
P185WDZ, HP450WCU, XP825WCU, HP1600WCU
Years produced
Formerly Ingersoll Rand portable line — Doosan ownership 2007–2021 — Bobcat branding since 2021.
Sound level
~72–76 dB(A) @ 7 m per EPA / EU limits.
Dimensions
P185: ~10 ft towable; HP450: ~13 ft; XP825: ~14 ft; HP1600: ~19 ft skid.
Weight
P185 ~2,500 lb; HP450 ~5,600 lb; XP825 ~7,800 lb; HP1600 ~19,000 lb.
Ambient range
-10 to 115 °F (with cold-start kit).
Motor efficiency
N/A — diesel engine drive.
Warranty
2-year package standard.
Replaces
Ingersoll Rand P-series portable line (legacy branding).
Control modes
  • Auto start/stop
  • Continuous run w/ inlet-throttle modulation
Typical applications
  • Construction sandblasting / demolition
  • Pipeline / utility
  • Water well drilling (HP variants)

Specs & intervals below are from publicly published OEM literature and long-standing field practice. Torque values, exact revision-dated part numbers, and safety-critical settings vary by serial number — always cross-check the unit’s OEM manual and nameplate before ordering parts or performing service.

Fluid
Spec: Doosan XHP505 or XHP605 compressor fluid; diesel per engine manual
Change interval: 500 hr engine oil, 1,000 hr compressor fluid
Torque guidance

Engine service per Cummins / Isuzu / Kubota manual by frame. Wheel lug torque: 90–110 ft-lb typical trailer wheel.

Always verify torque values against the OEM service manual for the specific serial number.

Wear parts
CategoryIntervalSource
Engine oil filter500 hr / annually
Engine air filter (primary & secondary)500 hr or restriction indicator
Compressor oil filter1,000 hr
Compressor separator element1,000–2,000 hr
Fuel filter/water separator500 hr
Coolant flush2 yr
DEF filter (Tier 4 Final)1,500 hr
DPF ash cleaning4,500 hr

Consumable part numbers change by revision and region — pull the current number from the OEM portal.

Parts cross-reference

OEM part numbers with commonly-cited aftermarket equivalents. Verify against the nameplate and OEM parts portal before ordering — dimensionally similar filters can still be wrong for the application.

Air filter
Compressor intake filter (P185)
OEM
36899734
Aftermarket
  • P181054— Donaldson
  • PA2848— Baldwin
VerifiedConfirmed against a public OEM or aftermarket catalog / cross-reference tool at time of entry.LikelyCommonly cited in the vendor's cross tool or long-standing field usage; not independently re-verified against the current OEM parts list.UnverifiedDimensional lookalike or user-reported.
Oil / fluid filter
Airend oil filter
OEM
36860336
Aftermarket
  • P550425— Donaldson
  • LF3325— Fleetguard
VerifiedConfirmed against a public OEM or aftermarket catalog / cross-reference tool at time of entry.LikelyCommonly cited in the vendor's cross tool or long-standing field usage; not independently re-verified against the current OEM parts list.UnverifiedDimensional lookalike or user-reported.
Air-oil separator
Separator element
OEM
36897332
Aftermarket
  • P532473— Donaldson
  • OS 5223— Hifi
VerifiedConfirmed against a public OEM or aftermarket catalog / cross-reference tool at time of entry.LikelyCommonly cited in the vendor's cross tool or long-standing field usage; not independently re-verified against the current OEM parts list.UnverifiedDimensional lookalike or user-reported.
Lubricant
Doosan XHP505 (PAO)
OEM
22252115 (5 gal)
Aftermarket
  • Rarus SHC 1025— Mobil
  • Cetus PAO 46— Chevron
VerifiedConfirmed against a public OEM or aftermarket catalog / cross-reference tool at time of entry.LikelyCommonly cited in the vendor's cross tool or long-standing field usage; not independently re-verified against the current OEM parts list.UnverifiedDimensional lookalike or user-reported.
  • Rarus SHC 1025— MobilUnverified
  • Cetus PAO 46— ChevronUnverified

XHP505 is PAO — do not mix with prior XHP405 (diester) charges without full flush.

Need to look up a number across all models? Use the parts cross-reference search.

Preventive maintenance
Daily
  • Check engine oil, coolant, compressor oil
  • Drain fuel/water separator
  • Check tire pressure & lug torque
  • Inspect service hose & fittings
500 hr
  • Change engine oil & filter
  • Change fuel filter
  • Check belts & hoses
1,000 hr
  • Change compressor oil, oil filter, separator
  • Adjust valve lash per engine manual
  • Test safety shutdowns
2,000 hr
  • Replace engine air filters
  • Sample compressor oil
  • Test all safety shutdowns under load
Common faults & first checks
  • Won't build pressure — inlet valve control cylinder leaking
  • Engine derate — clogged air filter or fuel filter
  • High compressor temp — cooler dirty (blow out daily on site)
  • DEF / DPF fault codes on Tier 4 Final engines
Known issues & field notes
  • Tier 4 Final DPF regeneration requires operator awareness — don't shut down mid-regen
  • Trailer brake lines chafe on rough sites — inspect at each move
Strengths
  • Field-serviceable
  • Rugged for jobsite duty
  • Wide parts availability
  • IR/Doosan/Bobcat pedigree
Weaknesses
  • Tier 4 Final emissions add complexity (DPF, DEF)
Field notes

Formerly Ingersoll Rand portable, then Doosan, now Bobcat brand. Line still commonly called Doosan or IR by techs.

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