Keeping Indonesia's Aggregate Lines Running: The WHB750 Fixed Hydraulic Rockbreaker in Action

Indonesia's construction boom shows no signs of slowing. From toll roads cutting across Sumatra to new industrial estates rising across Java and Kalimantan, the demand for high-quality sand and aggregate has never been greater. Behind every tonne of processed aggregate is a production line that cannot afford to stop — and behind every production line that cannot afford to stop, there needs to be equipment that simply does not let it down.

This is the story of how we helped one Indonesian aggregate producer solve a problem that had been costing them time, money, and manpower every single day — and how the WHB750 fixed hydraulic rockbreaker boom became the backbone of their crushing operation.

Project Overview

The Problem: A Production Line Held Hostage by Oversized Rock

Our customer operates a mid-to-large scale sand and aggregate production line in Indonesia, processing hard rock ore through a primary jaw crusher as the first stage of their crushing circuit. The geology of their quarry throws up a consistent challenge — irregular, oversized rock fragments that are simply too large to enter the crusher cleanly.

Before the WHB750 arrived, the site's approach to this problem was a combination of manual labour and improvised methods. Workers would enter the crusher feed area with handheld breakers to chip away at oversized material. It was slow, it was dangerous, and it was expensive. On a bad day, a single stubborn rock could halt the entire production line for the better part of an hour.

The site manager described the situation plainly when he first contacted us:

"We stop maybe four, five times a day because of big rocks. Every time we stop, we lose money. And every time a worker goes in there to break rock by hand, I worry about safety."

That combination — lost production and genuine safety risk — is exactly the problem the WHB750 was built to solve.

First Contact: Building Trust Before Talking Product

The customer's initial enquiry came through our website. They had been researching fixed rockbreaker boom systems for several weeks and had received quotations from multiple suppliers. Their first message to us was not a request for a price — it was a list of questions.

They wanted to know:

• Whether the machine could reach all areas of their crusher inlet given their specific hopper dimensions

• How long the boom would last under continuous multi-shift operation in a tropical climate

• What the colour options were — their site had a specific colour coding system for heavy equipment

• Whether the equipment carried recognised international certifications

• How the machine would be packaged for the sea freight journey to Surabaya

• What support would be available if something went wrong after installation

These were not the questions of a buyer simply looking for the cheapest option. These were the questions of an operations team that had been burned before by equipment that looked good on paper but failed in the field. We took every question seriously.

Step 1 — Engineering the Right Fit

Before recommending the WHB750, our engineering team requested the customer's crusher layout drawings and hopper dimensions. This is a step many suppliers skip — but for us, it is non-negotiable. A rockbreaker boom that cannot reach the full working area of the crusher inlet is not a solution; it is a compromise.

The analysis confirmed that the WHB750's working envelope was an excellent match for the customer's installation:

The 9,390mm horizontal reach meant the boom could cover the entire width of the customer's crusher feed hopper with room to spare. The 360° rotation gave the operator complete flexibility to address oversized material from any angle. We overlaid the WHB750's working radius diagram onto the customer's own site plan and sent it back to them — so they could see, visually and unambiguously, exactly how the machine would perform in their specific layout.

That single document did more to build confidence than any product brochure could.

Step 2 — Customisation: The Details That Matter

The WHB750 delivered to this Indonesian customer was configured specifically for their application and environment. Nothing about this unit was generic.

Three-Tone Colour Scheme

The customer's site uses a colour-coded equipment identification system. After discussion, we agreed on a striking three-tone finish:

• Main boom arms: vivid red — high visibility in the dusty quarry environment, consistent with the site's heavy equipment colour code

• Hydraulic cylinders and pipework: black — providing clear visual contrast and a professional, purposeful appearance

• Mounting base: grey — blending with the structural steelwork of the crusher platform

All surfaces were finished with a heavy-duty industrial coating system, selected for its resistance to the high humidity, temperature variation, and abrasive dust conditions typical of Indonesian quarry environments.

Hydraulic Hammer Matching

Based on the hardness profile of the ore being processed and the expected frequency of breaking cycles, our engineering team specified and fitted a hydraulic hammer with the appropriate impact energy class. The goal was not simply maximum power — it was the right power for the application, matched to the structural capacity of the WHB750 boom to ensure long-term reliability without accelerated wear.

Tropical Climate Adaptation

Indonesia's equatorial climate — persistent high humidity, intense heat, and frequent heavy rainfall — places specific demands on hydraulic systems and structural coatings. The WHB750 was prepared with:

• Hydraulic fluid specification appropriate for high ambient temperature operation

• All external hydraulic fittings sealed and protected against moisture ingress

• Structural coating system with enhanced corrosion resistance for tropical conditions

Control Station Configuration

The remote control station was configured for intuitive single-operator use, with clearly labelled controls in both English and Bahasa Indonesia. Safety interlocks were set to the customer's operational requirements, and the cable length was specified to allow the operator a clear sightline to the crusher inlet from a safe working distance.

Step 3 — Quality Inspection: Nothing Leaves Without Being Verified

The customer had a specific concern about quality control — a previous purchase from a different supplier had arrived with a hydraulic leak that took two weeks to diagnose and repair. They asked us directly: "How do we know the machine will arrive in working condition?"

Our answer was not a promise. It was a process.

Every WHB750 goes through a structured pre-shipment quality inspection before it is cleared for loading. For this unit, the inspection covered:

Structural Integrity

• Full visual and dimensional inspection of all boom arm fabrications

• Weld inspection at all structural joints and pedestal connection points

• Verification of all pin and bushing fits across the full range of motion

Hydraulic System

• Pressure test of the complete hydraulic circuit at 1.5× operating pressure, held for a minimum of 30 minutes

• Visual inspection of all hose runs, fittings, and cylinder seals under pressure

• Confirmation of zero leakage before sign-off

Functional Testing

• Full range-of-motion test — every axis of movement driven through its complete travel

• Remote control function verification — every input tested against its corresponding boom response

• Rotation test through the full 360° arc under load

Surface and Finish

• Coating thickness measurement at multiple points across all boom surfaces

• Adhesion test on representative areas

• Visual inspection of the three-tone colour finish against the agreed specification

Documentation

• CE Declaration of Conformity reviewed and confirmed complete

• Operation and maintenance manual confirmed present and correct

• Packing list cross-checked against physical contents

The customer received a copy of the completed inspection report — with photographs — before the container was sealed. For the first time in their experience of buying equipment from overseas, they knew exactly what condition their machine was in before it left the factory.

Step 4 — Packaging: Surviving the Journey to Surabaya

A 40HQ container travelling from Jinan to Surabaya passes through multiple port handling operations, experiences significant vibration during ocean transit, and is exposed to the temperature and humidity swings of a tropical sea voyage. We design our export packaging with all of this in mind.

The WHB750 was packed as follows:

• Main boom assembly secured to a heavy timber base frame with steel tie-down straps, all contact points protected with rubber padding and edge guards

• Hydraulic cylinders individually wrapped in moisture-barrier film and secured against movement

• All hydraulic ports and fittings capped with plastic protective caps to prevent contamination

• Hydraulic hammer individually crated in a timber case with foam lining and desiccant packs to absorb moisture during transit

• Remote control station and electrical components sealed in a waterproof case with foam cushioning

• Spare parts kit, hardware, and documentation packed in a clearly labelled steel accessory box, bolted to the base frame

The total package was designed so that when the container doors opened at the customer's site, everything was exactly where it should be — undamaged, dry, and ready for installation.

Step 5 — Certification: The Documentation That Opens Doors

For Indonesian import and site compliance purposes, the customer needed a clear and complete certification package. We provided:

• CE Declaration of Conformity — confirming compliance with applicable European machinery safety directives

• Full technical documentation package — including hydraulic schematic, structural drawings, and component specifications

• Operation and Maintenance Manual — in English, with key sections also provided in Bahasa Indonesia

• Pre-shipment inspection report — with photographic evidence of all QC checks completed

Having complete, correctly prepared documentation meant the customer's import clearance process was straightforward, and their internal HSE sign-off was completed without delays. In markets where documentation gaps can hold equipment in customs for weeks, this matters enormously.

Step 6 — Installation and Commissioning Support

When the WHB750 arrived at the customer's site, our technical team was available from day one of the installation process. Via video call and WhatsApp, we walked the customer's engineers through:

• Foundation anchor bolt installation and pedestal alignment

• Hydraulic connection sequence and initial system fill and bleed procedure

• First-start commissioning checks

• Operator familiarisation — boom movement, remote control operation, and emergency stop procedures

• Routine maintenance schedule — daily, weekly, and monthly checks

The installation was completed in three days. On the fourth day, the WHB750 broke its first oversized rock in live production. The site manager sent us a short video. The crusher ran continuously for the rest of the shift without a single stoppage.

The Results: What Changed After the WHB750 Went Live

The impact on the customer's operation was felt immediately and continued to compound over the following weeks:

✅ Production Stoppages Reduced from 4–5 Per Day to Near Zero

The oversized rock blockages that had been disrupting the production line multiple times daily were eliminated. The WHB750's 9,390mm reach and 360° rotation meant no fragment was beyond its reach, and its hydraulic breaking power meant no fragment was beyond its capability.

✅ Manual Rock Breaking Completely Eliminated

The practice of sending workers into the crusher feed area with handheld breakers — a genuine safety risk that had concerned the site manager for years — was ended entirely. The WHB750's remote-controlled operation kept all personnel at a safe distance from the crushing zone at all times.

✅ Measurable Increase in Daily Throughput

With the production line running continuously rather than stopping and starting throughout the shift, the customer's daily aggregate output increased significantly. The crusher was finally operating at the utilization rate it was designed for.

✅ Reduced Crusher Wear and Maintenance Costs

By breaking oversized material before it entered the jaw crusher, the WHB750 reduced peak mechanical loads on the crusher's jaw plates and toggle assembly — extending their service life and reducing the frequency of costly liner replacements.

✅ Improved Operator Morale and Site Safety Record

Perhaps the most human result of all: the workers who had previously been tasked with manual breaking told the site manager they felt genuinely safer. That is not a metric that appears on a production report, but it is one that matters.

Why This Customer Chose YZH — And Why They Would Again

Several months after commissioning, I spoke with the customer's operations director during a follow-up call. I asked him what had made the difference.

"We looked at three suppliers. Two of them just sent us a price and a brochure. YZH sent us a drawing showing exactly how the machine would work on our site. That told us you actually understood our problem — not just your product. After that, everything else — the quality, the packaging, the documentation — confirmed we made the right choice. And the price was fair. Not the cheapest, but fair for what we got."

That response reflects the values we try to bring to every project:

Conclusion

The WHB750 fixed hydraulic rockbreaker boom did not just solve a blockage problem for this Indonesian aggregate producer. It transformed the way their production line operates — replacing a daily cycle of stoppages, manual intervention, and safety risk with continuous, automated, remotely controlled rock breaking that keeps the crusher fed and the line running.

At YZH, this is what we mean when we talk about delivering value. Not just a machine. A solution — engineered for the specific application, built to the right standards, packaged to arrive in perfect condition, certified to open the right doors, and supported from the first enquiry to long after the first tonne of aggregate rolls off the line.

If your aggregate or mining operation faces similar challenges with oversized material at the crusher inlet, we would welcome the opportunity to show you what YZH can do.

www.yzhbooms.com

+86-15610128027