Caterpillar Hydraulic Pumps & Fan Motors (E305.5 to E345GC Excavators) Product Overview Core Part Numbers & Cross References This range of genuine Caterpillar hydraulic components includes pumps and fan motors with the following core part numbers: Mechanical Hydraulic Pumps (E305.5/E306/E307/E308): 423-0097 (4230097) | 290-3628 (2903628) | 397-3941 (3973941) | 455-7947 (4557947) 358-5004 (3585004) – E306E/E307E models | 296-3867 (2963867) – E307D/E308D models Electronic Hydraulic Pumps (E306.5/E307.5/E308.5/E310): 541-2638 (5412638) | 587-0008 (5870008) – Next Gen excavator variants Fan Pumps/Motors (E320/E323/E336/E345GC): 510-8095 (5108095) – E320/E323/E336 fan motors | 505-5180 (5055180) – E345GC fan pumps 524-0924 (5240924) – E336GC/E345GC/E349GC | 179-9778 (1799778) – E320C legacy fan pumps All parts are genuine Caterpillar OEM components manufactured to strict quality standards. Compatible Equipment & Engine Models These hydraulic components are engineered for Caterpillar mini/midi/large excavators: Mini/Midi Excavators (Mechanical Pumps): CAT E305.5 / 306 / 307 / 308 (D/E Series) – Powered by C1.7 / C2.4 / C3.3B engines Next Gen Excavators (Electronic Pumps): CAT E306.5 / 307.5 / 308.5GC / 310 – C2.4 / C3.3B electronic control engines Large Excavators (Fan Pumps/Motors): CAT E320 / 323 / 336 / 345GC – C4.4 / C7.1 / C9.3 ACERT™ engines Primary Functions Hydraulic Pumps: Convert engine mechanical power into hydraulic pressure to drive excavator arms, booms, buckets, and swing systems.Fan Pumps/Motors: Provide hydraulic power to the cooling fan system, regulating engine temperature for optimal performance and durability. Key Features 100% genuine CAT OEM components with factory calibration and testing Mechanical/electronic pump variants to match excavator control systems High-strength cast iron housing for resistance to wear and extreme operating conditions Precision-machined internal components for minimal leakage and maximum efficiency Direct drop-in replacement (no modification required for OEM fitment) Application & Installation Notes Proper selection and installation of these components ensures: Restored hydraulic performance in CAT excavators (flow rate: 40-220 L/min based on model) Optimal cooling system operation to prevent engine overheating Compliance with CAT recommended maintenance intervals (5000-8000 operating hours) Prevention of secondary damage to hydraulic cylinders, valves, and hoses Always verify part compatibility with your excavator’s serial number and CAT service manual; torque mounting bolts to 45-65 N·m (hydraulic pumps) / 55-70 N·m (fan motors) per OEM specs. Related Part Numbers NO P.N. NAME 1 6560-61-2111 Komatsu PC2000 Speed Sensor 6560-61-2111 2 6245-71-1100 Komatsu PC1250-8 Fuel Injection Pump 6245-71-1100 3 6245-51-9100 Komatsu Oil Pump 6245-51-9100 - SAA6D170E-5C/5A-01/5-B EGR Valve Lubri... 4 123-2233 123-2233 AP12 Main Hydraulic Pump for Caterpillar E320B 5 708-1S-00970 708-1S-00970 708-7S-00550 Fan Pump Motor for Komatsu WA470-6 Wheel Loa... 6 4439384 Hitachi EX1900/2500/2600/3600/5500 Swing Motor 4439384 4439491 7 708-1S-00240 708-1S-00240 Fan Pump Hydraulic Fan Pump for Komatsu D65-12 Crawler Do... 8 6245-81-9110 Komatsu PC1250SP-8R Wiring Harness 6245-81-9110 9 272-6959 CAT SBS140 Hydraulic Pump 272-6959 FOR CAT E325D 10 234-44-61430 Komatsu 234-44-61430 Valve for GD705/GD825 Auto Transmission 11 723-65-21700 723-65-21700 Main Control Valve for Komatsu D155AX-6 12 21N-27-00190 Komatsu PC1250 Final Drive Assembly 21N-27-00190 21N-27-00191 13 123-2230 CAT 123-2230 (Rexroth A8VO160) OEM Hydraulic Pump for 330B Excavator 14 708-2L-00280 708-2L-00280 Fan Hydraulic Pump for Komatsu PC2000-8 15 6245-11-8120 Komatsu 6245-11-8120 O-Ring SAA6D170 Engine Valve Cover Seal 16 6218-81-4111 Komatsu Sensor Assembly 6218-81-4111 Blowby - HD785-7 PC1250SP-8R SAA1... 17 723-63-12101 Komatsu 723-63-12101 Main Control Valve Assembly for D65E-12 D85E-12 C... 18 705-61-22010 Komatsu Final Drive Pump 705-61-22010 for GD825A 19 708-2L-00760 708-2L-00760 HPV165 Main Hydraulic Pump for Komatsu PC750-8 PC800-8 20 14X-911-7112 Komatsu PC1250SP-8R Air Conditioning Compressor 14X-911-7112 21 216-0038 216-0038 Hydraulic Main Pump for CAT 330C C9 Excavator Parts 22 708-1W-00450 708-1W-00450 Main Hydraulic Pump for Komatsu HM400-3 HM400-5 Articulat... 23 4689079 Hitachi EX1900-5 EX1900-6 Hydraulic Pump 4689079 24 708-1L-00320 Komatsu 708-1L-00320 Hydraulic Main Pump for D65-15 Crawler Dozer 25 6266-21-3400 6266-21-3400 Accessory Driver Assembly Alternator Drive 26 11Y-27-10102 11Y-27-10102 Travel Motor Assembly for Komatsu D31 D37 D39-21 Crawler ... 27 561-30-81111 Heavy-Duty OTR Rims 561-30-81111 569-30-73502 Wheel Rim for Komatsu HD... 28 6245-71-1111 Fuel Injection Pump 6245-71-1111 for Komatsu HD785-7 PC1250-8 29 102-0783 102-0783 Hydraulic Main Pump for Caterpillar E307 307.5 30 296-4727 296-4727 Cover Assembly for Caterpillar CAT Engine Oil Cooler Cover
