Metso GP550 Bowl Liner Concave

No. The GP550 was launched as a new generation platform (effectively "S" series architecture from day one). All GP550 Bowl Liners utilize the Hydraulic Clamp Ring locking system. There is no mechanical wedge locking version. Order the GP550 Hydraulic Clamp Kit (segments, bolts, seals) with every liner.

C (Coarse): ~4,000–4,200 kg (8,800–9,250 lbs) | M (Medium): ~3,700–3,900 kg | F (Fine): ~3,300–3,500 kg | EF (Extra Fine): ~3,100–3,200 kg. LIFT PLANNING CRITICAL – ENGINEERED LIFT REQUIRED: This exceeds the capacity of standard plant overhead cranes (typically 10t–25t). Requires 40t–60t+ certified overhead crane OR 130t–160t mobile crane with engineered spreader beam & 4-leg sling set. Verify rigging points (4x heavy lifting lugs standard). NW Rapid / Portable plants CANNOT change this liner onboard; requires heavy mobile crane on prepared pad. Plan 8–10 hour crane window minimum.

The GP550 has the largest annular backing gap in the Metso cone portfolio (wider adjustment ring seat). You need 150 – 200 liters (40 – 53 gallons) of two-component epoxy backing (Metso KrushMore, ESCOBACK 6000, Copps K-Back). Order a dedicated "GP550 Bowl Liner Backing Kit" (typically 7–8 x 25L pails). Critical: This volume generates massive exothermic heat. Pre-heat pails to 25–30°C; pour in 3 staged lifts (layers) with 45–60 min intervals to control peak temp (< 90°C) and prevent thermal shock cracking on the massive adjustment ring seat. Monitor with IR gun. Ensure adjustment ring seat is 100% dry/oil-free.

The GP550 processes higher tonnage of work-hardened (380–480+ BHN), high-silica/abrasive pebbles/ore at higher power draw (600 kW) than GP500. The combination of extreme impact at the reinforced feed eye + severe sliding compression in the extended parallel zone destroys standard Mn18Cr2 via micro-gouging, work-hardening fatigue, and rapid "hourglass" profile loss. TiC Composite provides instant 550–600 BHN hardness via dispersed Titanium Carbides, resisting both gouging (upper chamber) and sliding wear (parallel zone). Typical life uplift: 2.5x–3.5x, turning a 3–4 week liner into a 10–14 week campaign on the circuit constraint crusher. ROI on TiC premium is typically < 2 changes.

GP550/GP550S Hydraulic Clamp Ring (High Pressure System): Seat liner, verify 360° flange contact (feeler gauge < 0.05mm). Install clamp segments/bolts hand tight (verify segment orientation per manual). Connect calibrated hydraulic pump (10,000 psi / 700 bar gauge). Pressurize to Metso Spec Pressure (Typ. 220–260 bar / 3,200–3,800 psi - Verify specific manual for serial number). Hold pressure 5 mins. Verify ZERO GAP between clamp ring & adjustment ring flange 360° (Feeler Gauge 0.03mm). Torque mechanical lock bolts (if equipped on segments) to spec. Re-pressure Checks - NON-NEGOTIABLE: 2 Hours (Hot - Critical), 24 Hours, 72 Hours. The 600kW long stroke + pebble impact generates massive cyclic thermal relaxation. Missing the 2hr hot check is the #1 cause of liner shift/seal failure/wash-out on GP550.

Absolutely not. Zero interchangeability. GP550: Larger diameter, taller profile, revised chamber geometry (steeper/longer parallel zone), heavier flange, different bolt circle/hydraulic clamp interface. GP500: Smaller casting, different profile, different clamp interface. Attempting fitment destroys the adjustment ring, main frame, and creates immediate lethal safety hazards (ring bounce/ejection at 600kW).

Change at FIRST limit (Matched Set Policy - Capital Asset Protection): Parallel Zone Thickness < 35–40 mm (1.4–1.6"). CSS Drift > 6–8 mm wider than target setting. Product Flakiness Index > 12–15% (loss of parallel zone geometry). Throughput Drop > 12% (profile worn to "hourglass"). Visual: Feed lip cracking > 75mm deep; severe pitting/gouging in upper chamber; flange seat fretting/wash-out grooves. GOLDEN RULE: On GP550, ALWAYS change Bowl Liner & Mantle as a matched set. The revised steep cavity/long stroke amplifies "step wear" mismatch exponentially. Running new Bowl on worn Mantle (or vice versa) destroys the new liner in < 25% of normal life and induces uneven loading that cracks the Adjustment Ring (120k+).