How I Cut Epiroc Equipment Maintenance Costs by 19% Over 4 Years (A 6-Step Procurement Checklist)

If you manage a fleet of Epiroc drill rigs or hydraulic breakers, this is for you.

I'm a procurement manager at a mid-sized mining contractor in Western Australia. I've been managing our Epiroc parts and service budget (about $480k annually) for over 6 years now. I've negotiated with 40+ vendors, tracked every invoice in our ERP system, and made plenty of expensive mistakes along the way.

This 6-step checklist is what I wish someone had handed me on day one. It's not about getting the cheapest part. It's about getting the right part at the lowest total cost—something I only learned through a $15k redo in 2022.

Step 1: Auditing Your Current 'Cost Per Operating Hour'

Most managers look at the invoice total. I look at cost per operating hour (CPOH).

In Q3 2023, I ran a full audit on our three Epiroc D65 drill rigs. The numbers were ugly. We were spending $43/hour on maintenance across the fleet—way above the $28/hour we'd budgeted.

Here's the breakdown:

• Rig #1: $31/hr (mostly routine—rock drills, filters)
• Rig #2: $51/hr (hydraulic breaker issues, repeated seal failures)
• Rig #3: $47/hr (underground mining gear—higher wear from abrasive rock)

The insight? Rig #2 was the outlier. That led me to Step 2.

(Honestly, I'm not sure why I didn't do this audit sooner. It took one afternoon in our ERP system. My best guess is we were in 'firefighting mode'—just fixing the broken thing.)

Step 2: Comparing OEM vs. Aftermarket (But Carefully)

The classic procurement dilemma. I went back and forth between Epiroc OEM parts and aftermarket alternatives for about 8 months. OEM parts offered reliability but at a 30-40% premium. Aftermarket offered savings but with unknown longevity.

My approach now (after getting burned once):

• Critical wear items (drill bits, piston seals, shank adapters): OEM only. The risk of a $450 aftermarket seal causing a $4,000 piston rebuild isn't worth it.
• Ground engaging tools (GET), filters, hydraulic hoses: Trusted aftermarket or high-quality generic. I've saved about $12k year on filters from a certified alternative manufacturer (qualified by Epiroc standards).

I built a simple spreadsheet: OEM part vs. aftermarket part price, forecast lifespan, and risk of failure cost. That spreadsheet now governs every parts decision.

Step 3: Quantifying Hidden Costs (The 'Free Shipping' Trap)

Here's where real money hides. In March 2024, I compared costs across 5 vendors for a standard hydraulic breaker rebuild kit (Epiroc HB3100).

• Vendor A (Authorized Dealer): $4,200 + free shipping. Lead time: 3 days guaranteed.
• Vendor B (Online Specialist): $3,550 + $150 shipping. Lead time: 5-7 days estimated.
• Vendor C (Industrial Supplier): $3,800 + free setup, but $320 'restocking fee' if wrong.

I almost went with Vendor B. Then I calculated TCO:

• Vendor A: $4,200 total (no fine print).
• Vendor B: $3,700 + $280 for rush delivery (we needed it by Friday) = $3,980.
• The difference: Only $220. And Vendor A's part came with full Epiroc warranty.

That's a 5% difference hidden in 'estimated' shipping. I now require all vendors to quote delivered cost with guaranteed delivery date.

Step 4: The 'Inventory Buffer' Decision

I've never fully understood the inventory logic for high-wear Epiroc parts. The game is: stock too little and you're paying rush fees + downtime; stock too much and you're sitting on idle capital.

After tracking 180+ orders over 4 years, I found that 65% of our 'emergency' orders were for just 3 items: the shank adapter, the piston seal kit, and the main control valve O-ring set.

My solution: I now maintain a 2-unit buffer of those items at all times. The cost: about $2,800 in inventory. The savings: we haven't placed a single emergency order for those items in 18 months. That alone saved us around $1,200 in premium freight fees.

Step 5: Negotiating Service Contracts (Don't Accept the First Quote)

In January 2025, I renegotiated our annual service contract for two Epiroc drill rigs. The initial quote: $86,000 (parts + labor, 2 scheduled services each).

Instead of accepting, I asked for: 1) An itemized breakdown of parts vs. labor. 2) A commitment on labor rates for the year. 3) A discount for paying upfront.

Results:

• Itemized quote: $51k parts, $35k labor. I flagged the parts as standard wear items (not diagnostics).
• Final negotiated price: $78,500. They gave me a 5% discount on parts and capped labor at $140/hr.
• Annuity savings: $7,500. Over a 5-year contract, that's $37,500.

The vendor didn't get offended. They understood I was being diligent—I showed them my TCO spreadsheet. That transparency actually improved the relationship.

Step 6: Building a 'Rush Fee' Budget (Because It's Inevitable)

I used to hate paying for rush freight. I fought it every time. Then I calculated the cost of NOT rushing.

In Q2 2024, one of our underground mining Epiroc rigs had a catastrophic hydraulic breaker failure. The part (a bespoke casting) had a 14-day standard lead time. The rush option was $1,200 extra for 3-day delivery.

The alternative? The rig was down, costing us roughly $4,500/day in lost production. The numbers were stark.

• Rush fee: $1,200. Rig down time: 3 days. Lost production cost: $13,500.
• No rush fee: $0. Rig down time: 14 days. Lost production cost: $63,000.

I now budget $8,000 annually for 'critical parts rush freight'. That budget buys us guaranteed delivery certainty when downtime risks hitting five figures. And we rarely use all of it—having the budget approved just means I can act fast without committee approval.

Final Notes: Common Mistakes I Still See

Mistake 1: Only looking at unit price

I've been guilty of this. A $340 'budget' breaker piston seal that fails after 50 hours costs more than a $490 Epiroc OEM seal that lasts 300 hours. Cost per hour, not cost per item.

Mistake 2: Ignoring the 'deadline risk'

When you're ordering for a shutdown, the cheapest option with a 'maybe' delivery date is the most expensive option. Pay for certainty. The potential cost of delaying a shutdown is enormous.

Mistake 3: Not auditing your data

My first audit in 2023 revealed half of my 'budget overruns' were from unplanned emergency repairs—things that could have been scheduled and cheaper if caught earlier. Now I run a quarterly review of CPOH by rig. Simple. Effective.