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Saturated group gasket leak
Two groups means twice the lock-ups, and gaskets that wear on their own schedules. We back-flush, fit new Kees-spec gaskets, and verify each group seals cleanly.
Two groups, one tight bar
A Slim Jim earns its spot on a narrow bar by doing a full-size machine's job, so when it falters the whole line feels it. We repair the platform's usual suspects: group gasket leaks, brew boiler drift, paddle and joystick wear, pressure curves that wander off reference. Most fixes finish in a single visit with parts off the truck.
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Kees van der Westen · Premium specialty espresso, compact 2-group
The Slim Jim takes the Spirit's per-group brew boilers and fits them into a frame slim enough for a tight bar. Each group gets a dedicated 0.8L PID-controlled coffee boiler, fed through a thermo-siphon heat exchanger inside the shared 10.5L steam boiler, with 316L stainless throughout. Cafes choose it when the footprint is fixed and the standards aren't. On the bench it behaves like a Spirit wearing the Mirage's looks, and it wears in the same places: gaskets, bushings, and scale.
Why Grajqevci
Call in the morning and a technician is usually on-site before the day is out. Most Kees van der Westen Slim Jim jobs get diagnosed and fixed on the first visit.
Commercial coffee equipment is all we do, and Kees van der Westen Slim Jim is part of the weekly rotation. Not a generalist guessing at a service manual. Genuine OEM parts, industry-standard procedures.
Flat rate for the visit, with parts billed separately. For bigger jobs you'll see a written quote on-site before we proceed.
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Slim Jim faults we diagnose
Every Slim Jim fault below comes from real service calls, listed with what causes it and what we do about it.
Two groups means twice the lock-ups, and gaskets that wear on their own schedules. We back-flush, fit new Kees-spec gaskets, and verify each group seals cleanly.
Paddle linkages catch when their PTFE bushings wear. Fresh bushings and lubrication restore the full smooth throw.
Scale builds on dispersion screens until extraction goes uneven. We pull them annually, soak, inspect, and replace as needed.
Inconsistent brew pressure comes back to the pump or the OPV. Measured at the portafilter, then adjusted or replaced.
Pre-infusion drift comes from the solenoid, inlet pressure, or the expansion valve. We log the curve and identify the one that moved.
Each Slim Jim group has its own 0.8L PID-controlled brew boiler, so drift usually means one circuit's NTC or element. We test, descale, recalibrate, and replace as needed.
The shared 10.5L steam boiler scales like any other. We descale it, inspect the element, and replace it if it reads low.
A leak under the chassis gets pressure-tested and dye-traced to its source, and the failing part replaced.
Joystick steam wears at the pivot bushing. We replace it and the crisp action comes back.
A warming cool-touch wand has lost its insulation. We test the surface temperature and replace the assembly.
Display drift points to the NTC or its connector. We test, reseat, and replace what's out of spec.
Board-level faults on custom Kees electronics get diagnosed properly, with parts sourced through the European channel.
Custom panels are refitted or replaced through factory parts, with the finish preserved.
Quality drift without a clear fault means checking dispersion screens, grind, brew temperature, and pre-infusion in turn. We keep going until the shots agree.
Parts for older Slim Jims come through the European specialty channel, with honest lead times quoted upfront.
Your coffee emergency ends here
Call or submit the form. We confirm your address, model, and the issue.
An experienced technician arrives, runs full diagnostics, and identifies the root cause.
You receive a flat, itemized quote. Nothing proceeds without your green light.
We complete the repair, run a test cycle, and walk you through what to watch for.
Parts on the truck
The record
Long-term care home with three machines across our two floors. Their team treats the residents with respect every time they visit. That matters to us.
*Estimated based on the approximate distance from our nearest service centre, average commute time, and median service-call length for one machine. Prices in Canadian dollars (CAD $). Final quote provided on-site after diagnosis.
FAQ
21 answers covering service, repair, parts, installation, warranty, and edge cases.
Updated July 2026
Each group has its own 0.8L PID-controlled brew boiler, so one can drift while the other holds. Scale, a tired NTC sensor, or PID offset are the usual reasons. We test the affected circuit, descale, recalibrate, and replace what's out of spec.
A thermo-siphon heat exchanger inside the 10.5L steam boiler pre-conditions the feed water, then each group's dedicated 0.8L boiler brings it to its exact setpoint. It's the Spirit's thermal approach in a slimmer frame. For service, that means brew and steam faults stay neatly separated.
Scale in the steam boiler is the usual culprit: it insulates the element and chokes output. We descale, test the element's resistance, and replace it if it draws below spec. The level probe and sight glass get cleaned in the same visit.
It has the Mirage's signature looks, but the thermal system is borrowed from the Spirit: a dedicated PID-controlled brew boiler per group fed through a heat exchanger in the steam boiler. Cosmetically a Mirage, thermally a Spirit. Service-wise we treat it as its own platform with familiar parts.
Worn PTFE bushings or coffee fines in the pivot. We disassemble, replace the bushings, clean and lubricate, and confirm the throw is smooth from pre-infusion into brew.
Nine bar at the portafilter under load. If it won't hold there, the rotary pump is wearing or the OPV has drifted. We measure with a calibrated gauge, adjust the OPV, and replace the pump only when the numbers say so.
The boiler manifold, the brass fittings, and the drain routing, in that order of suspicion. We pressure-test, dry the chassis, and dye-trace so we fix the actual leak instead of the most visible one. Panels go back on with their original screws and seals.
Up to 350, which covers most specialty cafes comfortably. If you're pushing past that day after day, wear items like gaskets and bushings will need attention more often. We can set the service interval to match your real volume.
The common wear items, yes: Kees-spec group gaskets, paddle and joystick bushings, microvalve seals. Factory-specific parts come from the European channel with honest lead times quoted upfront. Telling us the symptom when you book improves the odds the part is on the truck.
Flat rate for the visit, parts billed at their actual cost on top. You'll hear the rate when you book, and for bigger jobs we quote in writing on-site before any work starts. No estimate that balloons mid-job.
Same-day in most cases. Call in the morning and a technician is usually on-site before the day is out; calls placed later in the day book for the next morning. Urgent breakdowns get priority routing.
The GTA and most of the Golden Horseshoe: Toronto through Mississauga, Vaughan, and Markham, out to Oshawa, Hamilton, and Niagara. If you're not sure you're in range, call and we'll tell you straight.
No. We work call by call. Plenty of customers put us on a maintenance schedule eventually, but that's their choice after seeing the work, never a requirement.
Parts carry their manufacturer warranty, and we stand behind our labour: if the same fault recurs, call us and we'll review it. Specific terms are discussed upfront on each job, not promised in marketing copy.
On-site whenever possible, which is most of the time. If a job genuinely needs the bench, like a full boiler rebuild or major electronics work, we'll say so before anything leaves your building.
Call us or send the form on this page. We confirm the machine, the fault, and a time window the same day. If it's urgent, say so and we'll route the nearest technician.
Diagnosis first: we confirm the fault, tell you what caused it, and quote the fix before touching a wrench. Most repairs finish in that same visit because the common wear parts ride on the truck.
High-wear parts for the platforms we service constantly ride on the truck. Anything else we order, usually next-day where suppliers allow, and we tell you the lead time before committing you to anything.
Usually, yes. We service legacy machines for as long as parts can be sourced, and we're honest when a repair stops making financial sense against a replacement. You get the math, you make the call.
Often, but that's not the pitch. We quote against the actual work, not a factory pricing book, and we'll tell you when a manufacturer warranty claim is the better route. Transparency is the value; the price usually follows.
Yes, and we do it by default on the way out. Half of repeat faults trace back to skipped daily cleaning or wrong routine, so the technician walks your team through what actually matters before leaving.
One visit from someone who knows the platform, not a parts lottery.
Call (289) 217-3796 now →