MacGregor Side-Rolling Hold-9 Small 10x8m
MacGregor Hatch Covers & Cargo Access. Ship hatch covers with hydraulically operated mechanisms to protect cargo holds from water ingress. Various structural types (folding, side-rolling, piggyback) based on vessel type and deck configuration. All systems: two-panel design with rubber gaskets, compression bars, hydraulic drives (cylinders/motors) and drainage systems with check valves. Operation via pressure discharge. Product lines: side-rolling (standard Panamax/Capesize), folding (Handysize/Handymax), piggy-back (space-constrained decks), lift-on/lift-off (multi-purpose), single-flap (compact design), stacking (weather decks), hydraulic-pivoting (vertical stowage).
Components & Design
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Technical Data
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Common failures & inspection points
Visual inspection for discoloration, cracks, deformation; tactile inspection of elasticity. Damaged sections (minimum 1 m length) must be replaced. Do not apply oil/grease products. Validate with ultrasonic leak detection test.
Surface inspection for corrosion and scratches. Check straightness with steel ruler. Damaged rods must be properly replaced/repaired and realigned (alignment critical for even compression).
Check oil level. Take oil samples and analyze quarterly for contamination. Oil change every 5 years; replace filter annually. Inspect piston rods for corrosion/scratches. For leaks inspect seal rings and cylinder block. Lubricate grease nipples between seal rings.
Inspect drainage channels for blockage (visual, if necessary with wire probe). Test check valves opening/closing manually (ball should move freely, not be hardened). Inspect drainage holes in cargo hold corners. Clean or replace if fouled.
Measure pad height against manufacturer specification. Wear of 4 mm or more destroys rubber seal. Damaged pads must be replaced with original spare parts of same size and material (involve specialists). Check movement between panel and cargo hold edge with pencil test.
Perform ultrasonic tightness test: place ultrasonic generator in closed cargo hold, run sensor receiver outside around all joints. Signal strength shows compression quality. Additionally chalk test: rub compression rods with chalk, imprint shows uneven compression. Hose test in empty cargo holds (0.5 m/s, 12 mm nozzle, 1–1.5 m distance) as validation.
Type-general inspection and maintenance points for this equipment category — not model-specific.
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