Bitzer 4PFR, Reciprocating compressor, Open, 4 Cylinders
Use this catalogue to identify the spare parts you need to repair your compressor. The OEM catalogue is crossreferenced with our spare parts database, matched items are highlighted. Some of our existing spare parts may not be shown because our database is incomplete (e.g. missing OEM P/N), or because we sell the items separatelly (typical example is the piston-connecting rod assembly). If you have any doubt please ask us.
All OEM manufacturer's names, part numbers, diagrams, products description and information are provided for reference and identification purposes only, and it is not implied that any part listed is the product of the OEM manufacturer.
Compressor description by Ralkin
Bitzer 4PFR Transport Refrigeration Compressor
The Bitzer 4PFR is part of the 4UFR to 4NFR series, a special design for truck and trailer refrigeration applications based on the approved compressor series for vehicle air-conditioning. The "R" designation stands for "Refrigeration," indicating optimization for R404A, R507A, and R22 across a wide application range from medium to low temperatures. These compressors offer high efficiency, recognized BITZER reliability, and benefit from being the slimmest in their class (307 mm width) with a wide speed range and belt-drive design.
Model Identification
- 4: Number of cylinders
- P: Displacement code (558 cm³ cylinder volume)
- F: Series designation (FR series)
- R: Refrigeration application (Optimized for R404A, R507A, R22)
Technical Features
- Refrigerant: Optimized for R404A, R507A and R22; other refrigerants upon request.
- Shaft Seal: Patented design with a secondary oil barrier, easily accessible for service.
- Drive Parts: Smooth running due to the four-cylinder principle, low friction losses from a surface-hardened crankshaft and hard chrome-plated piston rings.
- Cylinder Liners: Exchangeable and particularly wear-resistant.
- Bearings: Combined roller and sleeve bearings of the eccentric shaft, designed for extreme loads at high speed.
- Lubrication: Reversible oil pump.
- Oil Management: Minimum oil carry-over rate due to an internal oil separator.
- Valves: Dynamic working flapper valves made of impact-resistant spring steel, plus an integrated pressure relief valve.
- Shaft: Tapered shaft end for precise and low-vibration power transmission.
- Mounting: Exchangeable position of the suction shut-off valve for flexible mounting in tight spaces.
- Efficiency: High efficiencies through optimized geometry and dynamic characteristics of the working valves.
Specifications & Data
- Number of cylinders: 4
- Cylinder volume: 558 cm³
- Displacement at 1450 rpm: 48.5 m³/h
- Weight: 34.0 kg
- Oil charge: 2.5 dm³
- Speed Range: 500 – 2600 min⁻¹
- Pipe connections:
- Discharge Line: 28 mm (1 1/8 inch)
- Suction Line: 35 mm (1 3/8 inch)
- Optional Accessories:
- Capacity Control: Steps of 100% and 50%.
- Magnetic Clutch: LINNIG LA16KK or LANG KK 73.1.
- Crankcase heater: Available.
- Oil drier: Available.
| Item num. | Ralco P/N | OEM P/N | Description (from OEM manufacturer) | Add | |
|---|---|---|---|---|---|
| 1 | 37283207 | Gasket set. | |||
| 2 | 30407201 | Valve plate; dimensions: Ø65; used in: complete. | |||
| 3 | 36250303 | Oil pump; used in: complete; from year: 10/1999. | |||
| 4 | 36131802 | Shut-off valve; dimensions: Ø28 (1 1/8"); used in: Discharge gas side. | |||
| 5 | 36131803 | Shut-off valve; dimensions: Ø35 (1 3/8"); used in: Suction side. | |||
| 6 | 37402312 | Shaft seal. | |||
| 6 | 37402305 | Shaft seal. | |||
| 7 | 30229715 | Kit connecting rod / piston; dimensions: Ø65. | |||
| 9 | 30213119 | Connecting rod; dimensions: Ø70 × Ø16 × 90. | |||
| 10 | 30513201 | Bearing cover. | |||
| 11 | 30111601 | Eccentric shaft. | |||
| 12 | 38620027 | Cylindrical roller bearing; dimensions: Ø50 × Ø90 × 20 (DIN 5412 - NUP 210 E). | |||
| 13 | 31112218 | Cylinder liner; dimensions: Ø65 × Ø82 × 71. | |||
| 14 | 31112217 | Cylinder liner; dimensions: Ø65 × Ø82 × 71. | |||
| 15 | 37243402 | Gasket; dimensions: 242 × 230 × 1. | |||
| 16 | 37234401 | Gasket; dimensions: 191 × 115 × 1 - Ø65. | |||
| 17 | GKT23150 | 37261401 | Gasket; dimensions: 191 × 115 × 1. | ||
| 18 | 37231306 | Gasket; dimensions: Ø153 × 1. | |||
| 19 | RNG2019 | 37200119 | O-ring (CR). | ||
| 20 | 37271501 | Gasket; dimensions: Ø32. | |||
| 22 | GKT23011 | 37230111 | Gasket; dimensions: Ø42 × Ø30 × 1. | ||
| 23 | RNG75127 | 37200208 | O-ring. | ||
| 24 | GKT01058A | 38240305 | Gasket ring; dimensions: A22 × 27 × 1,5 (aluminum DIN 7603). | ||
| 25 | RTN23103R | 38250103 | Gasket ring; dimensions: Ø50 × Ø40 × 4 (NBR). | ||
| 26 | RNG28101 | 37202001 | O-ring. | ||
| 27 | SRO2100 | 36200302 | Oil filter; dimensions: Ø14 × 105. | ||
| 28 | SPG2108 | 32500001 | Pressure spring. | ||
| 29 | 36612451 | Magnetic screw; dimensions: M22×1,5 (permanent magnet); from year: 10/2001. | |||
| 30 | 36182601 | Sight glass; dimensions: M24×1 - Ø33 × 15. | |||
| 31 | 30241201 | Bottom plate; dimensions: 252 × 232 × 38. | |||
| 32 | 30542704 | Sealing cover; dimensions: Ø95 × 63; from year: 08/2010. | |||
| 33 | 36201003 | Suction gas filter; dimensions: Ø30 × 42; from year: 12/2000. | |||
| 34 | 36702901 | Blind flange; dimensions: 80 × 44,5 × 15. | |||
| 35 | 36532202 | Brazing and welding bush; dimensions: Ø28 (1 1/8") (steel coppered). | |||
| 37 | 36532203 | Brazing and welding bush; dimensions: Ø35 (1 3/8") (steel coppered). | |||
| 38 | 36702801 | Counter flange; dimensions: Ø22 - Ø28 (steel). | |||
| 39 | 36702802 | Counter flange; dimensions: Ø35 (steel). | |||
| 40 | VSG23000 | 36110029 | Pressure relief valve; dimensions: 3/4" - 14 NPTF (34 bar). | ||
| 41 | 36110104 | Pressure control valve; dimensions: M12×1 × 31,5 (3,2 bar). | |||
| 42 | 36150121 | Schrader valve; dimensions: 1/8" - 27 NPTF. | |||
| 43 | PLU2208 | 36611008 | Plug; dimensions: 1/4" - 18 NPTF (steel); from year: 10/2003. | ||
| 44 | PLU75022 | 36611001 | Plug; dimensions: 1/8“ - 27 NPTF (steel); from year: 10/2003. | ||
| 45 | 30236021 | Cylinder head; dimensions: 191 × 115 × 45. | |||
| 45 | 30236025 | Cylinder head; dimensions: 191 × 115 × 45. | |||
| 46 | 30542704 | Sealing cover; dimensions: Ø95 × 63; from year: 08/2010. | |||
| 47 | SNP2601 | 38222201 | Retaining ring with lugs; dimensions: Ø50 × Ø45,2 × 2; from year: 07/2001. | ||
| 48 | 36111005 | Gas equalising valve; dimensions: R1/2" - SW 27. | |||
| 49 | 31190101 | Bushing; dimensions: Ø28 × 33,8; used in: Drain insert. | |||
| 50 | 32031302 | Thrust segment. | |||
| 51 | 00000011 | is not required for this type !. | |||
| 52 | 00000011 | is not required for this type !. | |||
| 53 | 00000001 | Article cancelled; from year: 08/2010. | |||
| 54 | 00000001 | Article cancelled; from year: 09/2003. | |||
| 55 | 38005506 | Hexagon head screw; dimensions: M8 × 60 (DIN 931 - M8 × 60 - 10.9). | |||
| 56 | 38015552 | Hexagon head screw; dimensions: M8 × 30 (DIN 933 - M8 × 30 - 10.9). | |||
| 57 | 38015551 | Hexagon head screw; dimensions: M8 × 20 (DIN 933 - M8 × 20 - 10.9). | |||
| 58 | 38201152 | Washer; dimensions: A8 (steel galvanized DIN 134). | |||
| 59 | 38015553 | Hexagon head screw; dimensions: M8 × 60 (DIN 933 - M8 × 60 - 10.9). | |||
| 60 | 38001964 | Hexagon head screw; dimensions: M10 × 75 (ISO 4014 - M10 × 75 - 10.9). | |||
| 61 | 38005652 | Hexagon head screw; dimensions: M10 × 55 (DIN 931 - M10 × 55 - 10.9). | |||
| 63 | 38032252 | Countersunk screw; dimensions: M10 × 35 (DIN 7991 - M10 × 35 - 10.9). | |||
| 64 | 38033902 | Cheese-head screw; dimensions: M10 × 40 (ISO 4762 - M10 × 40 - 10.9). | |||
| 65 | 38005663 | Hexagon head screw; dimensions: M10 × 115 (DIN 931 - M10 × 115 - 10.9). | |||
| 65 | 38005664 | Hexagon head screw; dimensions: M10 × 120 (DIN 931 - M10 × 120 - 10.9). | |||
| 65 | 38001936 | Hexagon head screw; dimensions: M10 × 95 (ISO 4014 - M10 × 95 - 10.9). | |||
| 65 | 38001963 | Hexagon head screw; dimensions: M10 × 65 (ISO 4014 - M10 × 65 - 10.9). | |||
| 65 | 38001918 | Hexagon head screw; dimensions: M10 × 80 (ISO 4014 - M10 × 80 - 10.9). | |||
| 65 | 38001946 | Hexagon head screw; dimensions: M10 × 100 (ISO 4014 - M10 × 100 - 10.9). | |||
| 65 | 38001912 | Hexagon head screw; dimensions: M10 × 140 (ISO 4014 - M10 × 140 - 10.9). | |||
| 66 | GKT23602 | 37291602 | Gasket ring; dimensions: Ø51 × Ø47 × 2. | ||
| 67 | 31303102 | Blanking plate; dimensions: Ø80 × Ø51 × 10. | |||
| 68 | 38201152 | Washer; dimensions: A8 (steel galvanized DIN 134). | |||
| 69 | 38015552 | Hexagon head screw; dimensions: M8 × 30 (DIN 933 - M8 × 30 - 10.9). | |||
| 70 | 38201152 | Washer; dimensions: A8 (steel galvanized DIN 134). | |||
| 72 | 36211101 | Filter drier; dimensions: 175 × Ø19,5. | |||
| 73 | 38201153 | Washer; dimensions: A10,5 (steel galvanized DIN 134). | |||
| 74 | 38420102 | Woodruff key; dimensions: 5 × 9 (steel DIN 6888 - 5 × 9). | |||
| 75 | 38302202 | Clamping pin; dimensions: 3 × 20 (spring steel ISO 8748 - 3 × 20); from year: 09/2003. | |||
| 76 | 36620118 | Protective cap; dimensions: M22×1,5 // L=51 (plastic - GRP). | |||
| 77 | RNG70067 | 37201006 | O-ring (HNBR); from year: 11/2000. | ||
| 78 | 34320821 | Oil heater (24V - DC - 70 W). | |||
| 78 | 34320820 | Oil heater (12 V - 1 - 50/60 Hz - 70 W). | |||
| 79 | HTR2210 | 34590301 | Heater sleeve; dimensions: 1/2" - NPTF // 18 × 135. | ||
| 80 | 36523501 | Screwed nipple; dimensions: M22×1,5 - 3/8". | |||
| 82 | 00000001 | Article cancelled; from year: 08/2010. | |||
| 83 | RNG2019 | 37200119 | O-ring (CR). | ||
| 84 | SGM2010 | 38230046 | Piston ring; dimensions: Ø65 × 1,5 (ISO 6622). | ||
| 85 | SGM2011 | 38231013 | Piston ring; dimensions: Ø65 × 1,5 (ISO 6622). | ||
| 90 | 36709501 | Kit intermediate flange; dimensions: h = 13. | |||
| 90 | 36709503 | Kit intermediate flange; dimensions: h = 25. | |||
| 90 | 36709504 | Kit intermediate flange; dimensions: h = 34. | |||
| 90 | 36709505 | Kit intermediate flange; dimensions: h = 46. | |||
| 90 | 36709506 | Kit intermediate flange; dimensions: h = 52. | |||
| 90 | 36709507 | Kit intermediate flange; dimensions: h = 70. | |||
| 91 | 30299501 | Cross flange. | |||
| 91 | 36709501 | Kit intermediate flange; dimensions: h = 13. | |||
| 91 | 36709503 | Kit intermediate flange; dimensions: h = 25. | |||
| 91 | 36709504 | Kit intermediate flange; dimensions: h = 34. | |||
| 91 | 36709505 | Kit intermediate flange; dimensions: h = 46. | |||
| 91 | 36709506 | Kit intermediate flange; dimensions: h = 52. | |||
| 91 | 36709507 | Kit intermediate flange; dimensions: h = 70. | |||
| 93 | 38091005 | Sealing screw; dimensions: M36×1,5 (DIN 908 - M36×1,5). | |||
| 95 | 37271501 | Gasket; dimensions: Ø32. | |||
| 96 | 38033902 | Cheese-head screw; dimensions: M10 × 40 (ISO 4762 - M10 × 40 - 10.9). | |||
| 121 | 32035402 | Lifting eye; dimensions: 51 × 30 × 4. | |||
| 122 | 38005663 | Hexagon head screw; dimensions: M10 × 115 (DIN 931 - M10 × 115 - 10.9). | |||
| 122 | 38005664 | Hexagon head screw; dimensions: M10 × 120 (DIN 931 - M10 × 120 - 10.9). | |||
| 122 | 38001936 | Hexagon head screw; dimensions: M10 × 95 (ISO 4014 - M10 × 95 - 10.9). | |||
| 122 | 38001963 | Hexagon head screw; dimensions: M10 × 65 (ISO 4014 - M10 × 65 - 10.9). | |||
| 122 | 38001918 | Hexagon head screw; dimensions: M10 × 80 (ISO 4014 - M10 × 80 - 10.9). | |||
| 122 | 38001946 | Hexagon head screw; dimensions: M10 × 100 (ISO 4014 - M10 × 100 - 10.9). | |||
| 122 | 38001912 | Hexagon head screw; dimensions: M10 × 140 (ISO 4014 - M10 × 140 - 10.9). | |||
| 123 | 38005662 | Hexagon head screw; dimensions: M10 × 105 (DIN 931 - M10 × 105 - 10.9). | |||
| 123 | 38005664 | Hexagon head screw; dimensions: M10 × 120 (DIN 931 - M10 × 120 - 10.9). | |||
| 123 | 38005665 | Hexagon head screw; dimensions: M10 × 125 (DIN 931 - M10 × 125 - 10.9). | |||
| 123 | 38005667 | Hexagon head screw; dimensions: M10 × 145 (DIN 931 - M10 × 145 - 10.9). | |||
| 123 | 38001911 | Hexagon head screw; dimensions: M10 × 70 (ISO 4014 - M10 × 70 - 10.9). | |||
| 123 | 38001919 | Hexagon head screw; dimensions: M10 × 85 (ISO 4014 - M10 × 85 - 10.9). | |||
| 123 | 38001946 | Hexagon head screw; dimensions: M10 × 100 (ISO 4014 - M10 × 100 - 10.9). | |||
| 130 | 31190101 | Bushing; dimensions: Ø28 × 33,8. | |||
| 150 | 36013101 | Retrofit kit sealing cover; from year: 08/2010. | |||
| 151 | 32410102 | Fixing plate; dimensions: 60 × 15; from year: 08/2010. | |||
| 152 | RNG45085X2 | 37202002 | O-ring; from year: 08/2010. | ||
| 153 | 35590201 | Oil collection chamber; dimensions: Ø135 × 35; from year: 08/2010. | |||
| 154 | 37502318 | Plug; dimensions: Ø4 × 15; from year: 08/2010. | |||
| 155 | 37700051 | Hose; dimensions: Ø7 × Ø4 × 250; from year: 08/2010. | |||
| 156 | 38050951 | Oval head screw; dimensions: M5 × 6 (ISO 7380 - M5 × 6 - 010.9); from year: 08/2010. | |||
| 157 | 37235810 | Gasket; dimensions: Ø9,5 × 0,5; from year: 08/2010. | |||
| 158 | 36521420 | connection piece; dimensions: M6 × 4,5; from year: 08/2010. | |||
| 159 | 38030682 | Cheese-head screw; dimensions: M10 × 16 (DIN 912 - M10 × 16 - 10.9); from year: 08/2010. |
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