PKM 1450
Palfinger Marine PKM 1450 — Deck crane for cargo, provision, service, pipe handling, offshore vessel.
Inspector Detail
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Common issues
- Hydraulic cylinder seal leakage at luffing/telescoping rams, especially on older units
- Wire rope wear, birdcaging or corrosion at the winch drum and sheave contact points
- Slew bearing wear producing play or noise under load
- Load moment limiter (LMI) sensor drift causing false trips or, more seriously, missed trips
- Hydraulic hose chafing at articulation points
- Pin and bushing wear at boom and jib articulation points
- Control valve block leakage or sticking on cold start
Inspection checklist
- Visual inspection of boom, jib and structural welds for cracking or corrosion
- Wire rope inspection for broken wires, corrosion and birdcaging against discard criteria
- Function test of load moment limiter and overload/limit switches
- Hydraulic system check for external leaks, oil condition and filter differential pressure
- Slew bearing bolt torque check and play measurement
- Load/proof test per class and statutory requirement interval
- Check pins, bushes and grease points for wear and adequate lubrication
- Verify emergency lowering / manual override system operability
- Inspect crane base and deck foundation for cracking or corrosion
Service intervals
| Wire rope inspection | monthly visual; thorough inspection every 3 months |
| Hydraulic oil and filter change | per the manufacturer's maintenance schedule, typically every 2000-4000 running hours or annually - confirm against the Palfinger manual |
| Load/proof test | every 4-5 years or per class/flag requirement |
| Annual thorough examination (statutory) | annually |
| Slew bearing and pin greasing | weekly to monthly depending on duty cycle |
Typical wear limits
| Wire rope diameter reduction (discard criterion) | typically discarded at around 7-10% reduction from nominal diameter, or per broken-wire count over one rope lay length - confirm against the rope certificate and class rules |
| Slew bearing radial/axial play | manufacturer-specific maximum in the crane manual - do not assume a generic mm figure |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Wire rope of correct diameter and construction for the winch - never substitute construction type without manufacturer confirmation
- Hydraulic cylinder seal kits for luff/telescope/slew cylinders
- Load moment limiter sensor/pressure transducer
- Slew bearing bolts of the correct grade - never substitute with lower-grade fasteners
- Hydraulic filter elements
- Boom/jib pin and bush sets
Safety
- Suspended/dropped load hazard on wire rope or hydraulic failure - never work under a raised load
- Hydraulic system stored energy - relieve pressure before opening any circuit
- Crush hazard at pinch points during luffing/telescoping
- The LMI/overload system must never be bypassed or defeated
Class survey
Deck cranes are subject to annual thorough examination and periodic (4-5 yearly) load/proof testing under class or flag lifting appliance rules. Surveyors check LMI function test records, wire rope certificates/discard records, and structural condition of boom and pedestal welds; NDT of highly stressed areas may be requested at extended intervals.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Structural inspection of boom, jib, and pedestal for cracks, corrosion, deformation, and weld integrity (per EN 13852 / API 2C / NORSOK R-002)
Wire rope and sheave inspection: check for broken wires, kinks, wear, correct spooling on drum, and wire termination integrity
Hydraulic system check: oil level, hose condition (abrasion, leaks, fittings), pump pressure test, relief valve calibration, and cylinder seal integrity
Slewing ring and slewing gear inspection: lubrication, backlash measurement, bolt torque verification, gear tooth wear
Load testing and SWL verification: periodic proof load test at 110–125% SWL, functional test of overload protection and load-limiting devices
Hook, swivel, and block inspection: wear, deformation, safety latch function, crack testing on hook body (NDT as required by class)
Brake systems check: hoisting, luffing, and slewing brakes — test function, check pad/disc wear, verify fail-safe operation
Electrical and control systems check: limit switches (hoist upper/lower, slewing), emergency stop function, pendant/remote control operability, corrosion protection of enclosures
Type-general inspection and maintenance points for this equipment category — not model-specific.
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