The 804000325 Hand Pump is a genuine XCMG manual priming pump designed for motor grader hydraulic systems. This pump is used to prime the fuel system or hydraulic pilot circuit after maintenance. The 804000325 hand pump provides a reliable way to restore system pressure without cranking the engine. It is a critical component for maintaining proper hydraulic function on GR series graders, especially after filter changes or hose repairs.
The 804000325 Hand Pump features a durable cast aluminum body with a corrosion-resistant coating. The plunger is made of stainless steel with a double-lip seal to prevent leakage. The pump includes an integrated check valve that maintains prime between uses. As a genuine XCMG part, it matches the original flow rate and pressure specifications exactly. Using OEM hand pumps ensures quick priming and prevents air lock issues that can delay startup.
Engineered for reliability, the 804000325 Hand Pump delivers 0.5 ml per stroke with a maximum pressure of 10 bar (145 PSI). The pump handle is ergonomically shaped for comfortable operation, even with greasy gloves. The inlet and outlet ports are threaded for 3/8″ NPT fittings, allowing easy integration into existing lines. Each pump is tested for leakage at 1.5x working pressure before shipping. Using genuine components eliminates the frustration of manual pumps that lose prime or fail to build pressure.
| Parameter | Specification |
|---|---|
| OEM Number | 804000325 |
| Product Name | Hand Pump (Manual Priming Pump) |
| Brand | XCMG (Genuine OEM) |
| Pump Type | Single-acting reciprocating plunger |
| Material | Cast aluminum body, stainless steel plunger |
| Displacement per Stroke | 0.5 ml (0.03 cu in) |
| Maximum Working Pressure | 10 bar (145 PSI) |
| Maximum Static Pressure | 15 bar (218 PSI) |
| Port Thread | 3/8″ NPT (inlet and outlet) |
| Handle Type | Foldable, ergonomic rubber grip |
| Seal Material | Nitrile rubber (NBR), fuel/oil-resistant |
| Operating Temperature | -20°C to +80°C |
| Check Valve | Integrated stainless steel ball and spring |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited cycles |
Aftermarket hand pumps often use plastic internals that crack under pressure or after exposure to diesel fuel. The genuine 804000325 Hand Pump from XCMG is built with all-metal internals and high-quality NBR seals that resist fuel and hydraulic oil degradation. Independent tests show that OEM pumps maintain seal integrity for over 10,000 cycles, while generic units often fail within 2,000 cycles. This reliability means you won’t be stranded with a system that won’t prime.
Each 804000325 Hand Pump is assembled in a clean room environment to prevent contamination of the internal check valve. The plunger bore is honed to a mirror finish to reduce friction and extend seal life. XCMG’s quality control includes a 100% flow test at 5 bar and a leakage test under vacuum. The pump handle is tested for 5,000 fold/unfold cycles to ensure the pivot pin does not wear out.
Installing the 804000325 Hand Pump requires basic hand tools. First, relieve any pressure in the system. Remove the old pump and clean the mating ports. Apply a small amount of thread sealant (not Teflon tape) to the male NPT threads. Screw the pump in by hand until snug, then tighten an additional 1/4 turn with a wrench. Do not overtighten, as aluminum bodies can crack. Connect the inlet and outlet hoses and secure with hose clamps.
To prime the system, pump the handle slowly until resistance is felt (usually 20-30 strokes). The check valve should hold pressure; if the handle returns without resistance, there is an air leak upstream. Inspect the 804000325 Hand Pump every 500 hours for signs of external leakage or handle play. If the pump becomes difficult to operate, the plunger seal may be swollen; replace the pump as a unit. Store a spare pump in your parts cabinet to minimize downtime.
A faulty hand pump can make it impossible to restart the engine after a fuel filter change, leading to extended downtime. The genuine 804000325 Hand Pump restores quick priming capability, allowing you to bleed air from the system in under a minute. Operators report that OEM pumps build pressure twice as fast as aftermarket units, saving valuable time during service. The smooth handle action also reduces operator fatigue.
In a fleet study of 30 XCMG GR215 graders, those equipped with genuine 804000325 Hand Pumps had 90% fewer priming-related service calls over two years. The robust check valve also prevents fuel drain-back, eliminating hard starting after the machine sits overnight. For contractors who operate in remote locations, a reliable hand pump is essential for self-recovery. Investing in an OEM pump is a small cost compared to the expense of a tow truck.
XCMG’s hand pump production line uses CNC machining for the aluminum body to ensure consistent bore diameter and thread quality. The 804000325 Hand Pump plunger is ground and polished to a surface finish of 0.2 Ra. The check valve ball and seat are lapped together for a perfect seal. After assembly, each pump is cycled 100 times on a test bench to verify flow rate and pressure stability.
All 804000325 Hand Pumps are packaged in sealed plastic bags with a desiccant to prevent corrosion during storage. Bulk orders of 10 or more pumps come in a foam-lined case. XCMG’s global distribution centers maintain stock of this critical component, with express shipping available to any location. For emergency needs, 24-hour rush service is offered through the contact buttons above.
The 804000325 Hand Pump directly replaces original part numbers 804000324 and 804000326. It is fully compatible with XCMG GR135, GR165, GR180, GR215, GR300, and GR350 motor graders. This pump is used in both the fuel priming circuit and the hydraulic pilot system on some models. For graders with electric priming pumps, this hand pump serves as a backup. Always check your machine’s parts manual to confirm application.
When ordering the 804000325 Hand Pump, also consider purchasing spare seals (part 804000327) and the handle retaining clip (part 804000328). XCMG recommends replacing the pump every 5,000 hours or at the first sign of leakage. For machines operating in dusty or sandy environments, inspect the pump more frequently. Keep a spare pump in your service vehicle to avoid downtime.
For custom configurations, such as extended handles or different port threads, use the buttons above to contact our engineering team. We can also supply pumps with Viton seals for aggressive fluids. Always provide your grader’s serial number when ordering the 804000325 Hand Pump to ensure correct fitment.
