Hydraulic Parts for Excavators: Pumps, Motors, Cylinders, Valves & Seal Kits

Hydraulic Pumps for Excavators

The hydraulic pump is the pressure source for your entire excavator system; without it, no attachments move, and no functions operate. Imara Engineering supplies a full range of excavator hydraulic pumps built for high-cycle, high-pressure working environments. Our pump range covers four key categories:

• Main Hydraulic Pumps — The primary drive pump is responsible for generating full system pressure across all excavator functions. Available for Komatsu PC200, PC300, CAT 320, 323, Hitachi ZX series, and more. 
• Gear Pumps — Used in auxiliary and charge circuits, gear pumps deliver consistent low-pressure flow for pilot, steering, and cooling functions across excavator and loader models.
• Pilot Pumps — The pilot pump powers your joystick and control circuit, translating operator input into machine movement. A failing pilot pump results in sluggish or completely unresponsive controls. 
• Piston Pumps — High-efficiency axial piston pumps built for the variable-displacement demands of modern excavators, manufactured to OEM tolerance for long service life. 

Hydraulic Motors for Excavators

Hydraulic motors convert pressurised fluid into the rotational force that drives your machine's movement and upper structure rotation. A worn or failing motor causes slow travel, loss of swing torque, and unsafe machine behaviour. Imara Engineering supplies motors for the two most critical drive functions on any excavator:

• Travel Motors — Also called final drive motors, travel motors power the undercarriage tracks under continuous heavy load. We supply complete travel motor assemblies and internal components for all major excavator brands. 
• Swing Motors — The swing motor drives the rotation of the upper structure. Slew motor failure is one of the most common and costly hydraulic failures on an excavator. Our replacements restore full slewing speed and torque. 

Hydraulic Cylinders for Excavators

Hydraulic cylinders are the linear actuators of your excavator, extending and retracting to move the boom, arm, and bucket through their full working range. A leaking or seized cylinder reduces breakout force, creates safety risks on site, and significantly slows productivity. Imara Engineering supplies hydraulic cylinders and circuit components across four categories:

• Boom Cylinders — The largest cylinders on your excavator, responsible for raising and lowering the boom under full load. Supplied as complete assemblies for Komatsu, CAT, Hitachi, and other brands. 
• Arm Cylinders — Also called stick cylinders, arm cylinders control the reach and curl of the dipper arm. Available for all major excavator models with direct bolt-on fitment. 
• Bucket Cylinders — Bucket cylinders deliver curling and dumping force at the working end of your machine. Matched to your model for guaranteed fitment. 
• Hydraulic Hoses & Pipes — High-pressure hydraulic hoses, pipes, and fittings connecting your entire hydraulic circuit. Available in standard sizes and custom lengths for all excavator types. 

Hydraulic Valves for Excavators

Hydraulic valves regulate pressure, flow, and direction across your excavator's entire hydraulic circuit. A faulty valve causes erratic machine behaviour, pressure loss, and uncontrolled movement, making it one of the most critical service items on any excavator. Our valve range covers three key types:

• Control Valves — The main control valve (MCV) distributes hydraulic flow to each function: boom, arm, bucket, travel, and swing. We supply complete assemblies and individual spool sections. 
• Relief Valves — Pressure relief valves protect your hydraulic system from overpressure damage, preventing costly failures in pumps, cylinders, and motors downstream. 
• Regulator Valves — Flow and pressure regulator valves maintain consistent hydraulic performance under variable load conditions, ensuring smooth, predictable machine response at all times. 

Hydraulic Seals & Kits for Excavators

Hydraulic seals are the most frequently replaced components in any hydraulic system. A worn or damaged seal causes fluid leakage, pressure loss, and internal contamination, accelerating wear across the entire circuit if left unaddressed. Imara Engineering offers a complete hydraulic seal kit range covering every major assembly on your excavator:

• Pump Seal Kits — Rebuild your hydraulic pump without replacing the entire unit. Includes all internal seals, o-rings, and gaskets for a full pump overhaul. Shop Pump Seal Kits →
• Motor Seal Kits — Complete seal kits for travel and swing motor rebuilds. Restore internal operating pressure and eliminate external leaks. 
• Hydraulic Cylinder Seal Kits — Full seal and wiper ring kits for boom, arm, and bucket cylinder rebuilds. Restore cylinder efficiency and eliminate rod seal leaks. 
• Centre Joint Seal Kits — The centre joint (swivel joint) connects the upper and lower hydraulic circuits through the slew ring. Our kits restore fluid-tight operation and prevent cross-circuit contamination. 
• Transmission Seal Kits — Final drive and gearbox seal kits for travel system rebuilds. Prevent oil migration and maintain full drive efficiency. 
• O-Ring Kits — Comprehensive o-ring assortment kits for hydraulic circuit maintenance, available in metric and imperial sizes compatible with all major excavator brands. 

Why Source Your Hydraulic Parts from Imara Engineering?

When your machine is down, every decision counts. Here is why operators and fleet managers across Africa trust Imara Engineering for their excavator hydraulic parts:

1. OEM-Grade Quality — All parts are manufactured to original equipment specifications — same tolerances, materials, and pressure ratings as genuine components.
2. Guaranteed Fitment — Every part is cross-referenced by machine model, serial number, and OEM part number for a direct, no-modification fit.
3. Ready Stock, Fast Dispatch — We maintain inventory on all high-demand hydraulic parts for prompt order processing and fast dispatch to your site.
4. Wide Brand Coverage — Komatsu, Caterpillar, Hitachi, Volvo, Doosan, Kobelco, Bobcat, Case, and more — all covered under one roof.
5. Parts Specialist Support — Not sure which part you need? Our team will match the correct component to your machine before you place your order.