This excerpt from the user's manual can explain the problem of your hinge.
"... However, the centre of the enamel has no negative effect on the operation of the WHIRLPOOL AKZ 336/IX oven or any door or hinge safety device. The oven should be cleaned after each use, when dirt can be removed quickly and easily. Models with aluminium or steel front The oven door is a damp, wiped cloth...."
WHIRLPOOL AKZ336WH, AKZ336NB, AKZ336IX, AKZ 336/IX, AKZ 336/NB, AKZ 336/WH
Manufacturer's part price is £11.00 Discount for bulk (starting at 10 units), £10.64 per unit
This manufacturer part is recomended by WHIRLPOOL, which gives it a 10/10 rating.
This spare part is recommended for your WHIRLPOOL AKZ 336/IX oven .
All spare parts are new and come with a 1 year warranty
① Carefully check your WHIRLPOOL oven's product number
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