Komatsu 708-3t-00230 hydraulic pump for Komatsu PC88R-6 mini excavator
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Product Overview
This high‑performance aftermarket variable axial piston pump, part number 708‑3T‑00230, serves as the central hydraulic power source for Komatsu PC88R‑6 midi excavator. Integrated with built‑in gear pilot pump, this assembly supplies pressurized hydraulic oil for boom lifting, arm crowding, bucket excavation, crawler travel, upper‑structure slewing and dozer blade operation. Widely used in municipal engineering, pipeline trenching, residential site preparation, landscaping renovation and indoor demolition projects, this midi‑size machine frequently works under mixed‑load conditions with continuous start‑stop cycles. Long‑time operation together with hydraulic oil contamination will gradually wear cylinder block, piston shoes, valve plate, drive shaft and internal regulator assembly. When wear accumulates, operators will encounter obvious equipment failures including insufficient digging breakout force, sluggish combined movements, high‑pitched howling noise from pump compartment, rapid hydraulic oil temperature rise, weak travel power and shaft‑end oil seepage. Manufactured strictly following original sample dimension and performance parameters, this aftermarket main pump supports direct drop‑in replacement to fully restore the machine’s responsiveness and working productivity.
Core Advantages
1. Optimized friction pair for midi‑excavator complex working conditions
Key matching components such as cylinder block, piston shoes and valve plate adopt refined alloy material and multi‑step heat‑treatment process. Precision grinding controls assembly clearance within reasonable range, effectively reducing internal leakage under frequent load fluctuation. It delivers outstanding anti‑cavitation performance, slowing component aging even when hydraulic fluid contains tiny impurity particles, extending overall pump service life under diverse site conditions.
2. Pre‑calibrated load‑sensing regulator together with integrated pilot pump
Every finished pump completes pressure‑flow debugging on professional hydraulic test bench. Regulator parameters keep consistent with OEM standards, which can sensitively respond to real‑time load changes of excavation action. Built‑in pilot gear pump guarantees stable pilot control pressure for joystick operation, avoiding slow response and jitter of operating handles caused by insufficient pilot pressure.
3. Perfect dimensional compatibility to shorten site maintenance cycle
Mounting flange size, spline specification, oil port layout and regulator installation position are fully matched to original specifications. Maintenance technicians can finish pump replacement without modifying pipelines or readjusting complex hydraulic parameters. It greatly cuts down machine downtime for rental fleets and local repair workshops, lowering economic loss caused by equipment stand‑still.
4. Reinforced cast housing and comprehensive sealing solution
Integral high‑density cast housing absorbs vibration and pressure impulse generated during frequent digging and dozing work. Premium shaft seal together with complete O‑ring sets effectively blocks high‑pressure oil leakage, preventing outside dust and dirt from invading pump interior and avoiding secondary abrasion damage to the whole hydraulic system.
5. Cost‑effective maintenance alternative for midi‑size excavator
Genuine original main pump faces high purchasing cost and long procurement lead‑time. This aftermarket pump provides reliable comprehensive performance at competitive price point. It becomes an ideal spare‑part selection for repair shops, equipment rental companies and global construction machinery spare‑parts distributors.
Manufacturing & Quality Control
Our factory focuses on manufacturing aftermarket hydraulic pumps for Komatsu midi and small‑tonnage excavators. Full‑process quality inspection is implemented from raw material incoming check to finished goods delivery, covering material composition verification, hardness testing for heat‑treated parts, key dimension measurement, dust‑free assembly, hydraulic bench test including pressure, flow rate, noise and simulated cyclic load inspection. Only fully qualified units can enter packaging procedure. Finished pumps are coated with anti‑rust oil, wrapped with shock‑proof cushioning materials and packed in export‑grade fumigated wooden cases, protecting products from scratch, deformation and oxidation during long‑distance ocean transportation. We support bulk wholesale, stable batch supply, small trial orders are acceptable for global customers.
Frequently Asked Questions
Q1: What abnormal phenomena indicate main pump inspection or replacement is needed?
A: If PC88R‑6 excavator shows weak digging power, slow compound movements, obvious humming noise near main pump, fast hydraulic oil overheating, unstable pilot handle response, or metallic powder detected inside hydraulic filter element, system pressure test and main pump disassembly inspection should be carried out.
Q2: Can this hydraulic pump fit other Komatsu excavator models?
A: This assembly is specially produced for Komatsu PC88R‑6. Different midi excavator main pumps differ greatly in displacement, spline size and pilot pump structure. Please double‑verify your original part number 708‑3T‑00230 before placing order to prevent installation mismatch.
Q3: What key points should be noticed during installation?
A: Thoroughly clean hydraulic oil tank, pipelines and hydraulic cooler, replace brand‑new hydraulic oil and all filter elements. Keep assembling environment clean to stop impurities entering pump inner chamber. After assembly completion, perform system exhaust work and run low‑speed no‑load running‑in test before putting excavator into formal construction operation.
Q4: Warranty scope explanation
A: Our warranty covers defects caused by manufacturing process. Damage triggered by contaminated hydraulic oil, improper installation operation, cavitation erosion and long‑time overload service is not included within warranty coverage. Please strictly follow Komatsu official maintenance manual during overhaul work.