In-line fuel filter with part number P765325 by the renowned Donaldson brand, equivalent to OEM number 320/A7170 (and 320/07394). It is a high-efficiency flow-through filter used in JCB machines such as 3CX/4CX backhoe loaders, telehandlers, and agricultural machinery. Its task is to effectively clean diesel fuel from solid contaminants before feeding it to the pump and injectors.
Donaldson filters are at the forefront of filtration technology. The P765325 model offers very high efficiency (5 microns), which is crucial for protecting modern diesel engines against microscopic particles that can damage the injection system.
| Brand / Type | Models |
|---|---|
| JCB Backhoe Loaders | 2CX, 2CX CITY, 2CX S4, 3CX 4T, 3CX 4T ECO, 3DX, 4CX |
| JCB Telehandlers | 524-50, 526 S, 526-55, 526-56, 527-55, 528-70, 531-70, 531-70 AGRI, 533-105, 535-95, 535-125, 535-125 HVB, 535-140, 535-140 HIVIZ, 535 V 125, 536-60, 536-70 AGRI X TRA, 540-170, 540-200, 541-70 AGRI, TM 3103 |
| JCB Mini/Midi/Other | 8020 CTS, 8025 ZTS, ROBOT 190 T, ROBOT 225 T, 225 T, 260 T, 320 T, 406 T4, 411 HT, 926, 926-4 RM, 940, VM 115 HD VIBROMAX |
| JCB Generators | G 60 RX, G 80 RX, G 100 RS, G 100 RX |
| Other Brands | VOLVO MC 115 C, THWAITES (MACH 666, 764, 766), FOGO (FDR 60/80 B3S), GILLISON (GVF 5000/6000/8000) |
| JCB Engines | 444 N2, 444 NA, 444 NG, 444 T1, 444 T2, 448 TG 60, 448 TG 72 |
Filter fits machines requiring part number 320/07394C1. Check connection diameters before purchase.
The in-line filter is disposable. It is mounted on flexible hoses using hose clamps. When replacing, it is worth checking the condition of fuel lines for cracks.
This filter has a flow direction and different port diameters (5/16" inlet, 3/8" outlet). Reverse installation is difficult due to diameter differences, but forcing hoses can lead to damage or leaks. Always pay attention to the flow arrow on the housing!
Filter 320/A7170 cleans fuel flowing through the supply line.
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The diameter difference (5/16" inlet and 3/8" outlet) is a safeguard against incorrect installation (Poka-Yoke). This prevents the filter from being connected in reverse, which could result in lack of filtration or flow blockage.
In some machines, it acts as a main filter, but it is often used as a pre-filter or additional filter on the supply line, working with a water separator.
In-Line filters are extremely simple in design but very effective. Thanks to the transparent housing (in some versions) or ease of disassembly, they allow for a quick visual assessment of the quality of fuel flowing from the tank.
Do you have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you select the right part to get your equipment back to work as quickly as possible.
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The Donaldson P765325 is an in-line diesel fuel filter designed to effectively clean fuel before it reaches the engine, protecting the fuel pump, injectors and entire fuel system — ensuring reliable engine operation and longer service life.

















