Mini Hydraulic Oil Pump with Brushless 40A Motor/ESC

RC4WD MINI HYDRAULIC OIL PUMP WITH BRUSHLESS MOTOR / ESC – VVV-S0090

The RC4WD VVV-S0090 Mini Hydraulic Oil Pump is a compact hydraulic power unit for RC heavy-machinery applications. It combines a pre-installed hydraulic pump, a 280KV brushless motor, electronic speed control and M5-to-M4 hydraulic nozzles in one assembly intended for systems where packaging space is limited but controlled hydraulic pressure and flow are still required.

BRUSHLESS HYDRAULIC POWER UNIT

RC4WD specifies a 280KV brushless motor driving the pre-installed hydraulic pump. The motor is rated for 7.4–12.6V input, with published maximum efficiency above 85% and continuous current of approximately 10–12A. In practical terms, this places the assembly squarely in 2S–3S LiPo territory when used within the complete RC4WD hydraulic system.

• Manufacturer: RC4WD
• Part Number: VVV-S0090
• Component Type: Mini hydraulic oil pump with brushless motor and ESC
• Total Weight: 8.74oz / 248g
• Motor KV: 280KV
• Motor Input Voltage: 7.4–12.6V
• Motor Max Efficiency: >85%
• Motor Continuous Current: 10–12A
• Motor Diameter: 35mm
• Motor Total Length: 43mm

HYDRAULIC PUMP SPECIFICATIONS

The pump body measures approximately 35 × 29 × 16mm and uses SKD11 Japanese steel hardened to 50 HRC for the internal pump structure. RC4WD lists the pump as heat-treated for strength and equipped with a booster tank and hydraulic M5-to-M4 straight nozzles.

• Pump Length: 35mm
• Pump Width: 29mm
• Pump Height: 16mm
• Pump Material: SKD11 Japanese steel
• Hardness: 50 HRC
• Rated Pressure: 3.5–4.5MPa
• Maximum Oil Pressure: 8MPa
• Maximum Published Flow: 420ml/min
• Hydraulic Connection: M5-to-M4 straight nozzle

WHAT THE PRESSURE NUMBERS MEAN

The published 3.5–4.5MPa rated-pressure range is the appropriate operating reference for the pump itself, while the listed 8MPa maximum oil pressure should not be interpreted as a target system setting. A complete hydraulic circuit also includes tubing, fittings, valves, cylinders and pressure-control hardware, and the safe operating limit is determined by the lowest-rated component in that entire circuit.

FLOW & ACTUATOR SPEED

RC4WD publishes a maximum flow figure of 420ml/min. Flow rate influences actuator speed, while pressure determines how much hydraulic force the cylinder can generate. In use, the final movement speed will also depend on cylinder bore, system restriction, oil temperature, valve opening and motor command. Do not assume the published maximum flow will be seen continuously under every operating condition.

ESC & ELECTRONIC CONTROL

The supplied ESC measures approximately 34.5 × 34 × 28.6mm. RC4WD's current product page describes the package as a 45Amp motor ESC combo, even though the long-standing product title refers to a 40A Motor/ESC. GASHEAD RC preserves the manufacturer product title for catalog consistency while calling out the current RC4WD specification here to avoid ambiguity.

• ESC Length: 34.5mm
• ESC Width: 34mm
• ESC Height: 28.6mm
• Manufacturer Current Listing: 45Amp motor ESC combo

WHAT'S INCLUDED

• 1x Brushless Motor
• 1x Pre-installed Hydraulic Oil Pump
• 2x Hydraulic M5-to-M4 Straight Nozzles
• 1x Brushless Electronic Control / ESC

DIRECT RC4WD APPLICATION

RC4WD lists VVV-S0090 as a replacement component for the 1/14 8x8 Armageddon Hydraulic Dump Truck (FMX) – VV-JD00017. The same pump is also identified by RC4WD as a replacement part in additional heavy-machinery platforms including the 1/14 Earth Mover 870K hydraulic wheel loader.

HYDRAULIC OIL & SYSTEM MATCHING

RC4WD pairs its heavy-machinery hydraulic systems with AW ISO 32 hydraulic oil. When replacing a pump, confirm oil type, tubing size, fitting thread, operating voltage and the system's pressure-relief strategy before installation. Mixing incompatible fittings or operating above the limits of downstream components can create leaks, hose failures or damage to valves and cylinders.

INSTALLATION & STARTUP CHECKLIST

• Confirm system voltage is within the 7.4–12.6V motor specification.
• Verify polarity and ESC signal wiring before applying power.
• Confirm M5-to-M4 nozzle and tubing compatibility before filling the system.
• Use clean hydraulic oil and keep open fittings capped during installation.
• Prime the pump and remove trapped air before applying heavy load.
• Check all fittings for seepage at low pressure first.
• Verify the pressure-relief system is functional before operating near rated load.
• Keep the pump and ESC away from moving linkages and protect wiring from abrasion.
• Monitor motor and ESC temperature during initial operating cycles.

SERVICE CONSIDERATIONS

Noise, aerated oil, inconsistent cylinder speed or a sudden drop in hydraulic force can point to air ingestion, restricted plumbing, low oil level, worn pump components, loose fittings or an electrical supply problem. Diagnose the complete circuit instead of assuming the pump is automatically at fault.

GASHEAD RC NOTE

This is a compact but serious hydraulic power unit. The published 3.5–4.5MPa working range, 420ml/min maximum flow and 280KV brushless drive make it capable of real work in scale machinery, but the system only performs as well as the plumbing around it. Keep the oil clean, control pressure properly, route hoses without kinks and treat the 8MPa figure as an absolute pump specification—not a normal operating target.