C7.1 Commercial Marine Engine Caterpillar


Cylinder Head - Inspect

Usage:

C7.1 GJN

  • Lepaskan cylinder head dari engine.

  • Lepaskan rumah regulator temperatur air.

  • Periksa cylinder head untuk melihat tanda-tanda kebocoran gas atau cairan pendingin.

  • Lepaskan pegas katup dan katup.

  • Bersihkan permukaan bawah cylinder head secara menyeluruh. Bersihkan saluran cairan pendingin dan saluran oli pelumasan. Pastikan permukaan kontak cylinder head dan blok silinder bersih, mulus, dan datar.

  • Periksa permukaan bawah cylinder head untuk melihat pelubangan, korosi, dan retakan. Periksa area di sekitar sisipan dudukan katup dan lubang untuk nozzle injeksi bahan bakar dengan hati-hati.

  • Uji cylinder head untuk mendeteksi kebocoran pada tekanan 200 kPa (29 psi).


    Ilustrasi 1g03877514
    Kerataan cylinder head (contoh umum)
    (A) Sisi ke sisi
    (B) Ujung ke ujung
    (C) Diagonal

  • Ukur kerataan cylinder head. Gunakan pinggiran lurus dan pengukur feeler untuk memeriksa kerataan cylinder head.

    • Ukur cylinder head dari satu sisi ke sisi yang berlawanan ().

    • Ukur cylinder head dari satu ujung ke ujung yang berlawanan (B).

    • Ukur cylinder head dari satu sudut ke sudut yang berlawanan (C).

    Rujuk ke Spesifikasi, "Cylinder Head" untuk persyaratan kerataan.

    Pelapisan ulang Cylinder Head

    Permukaan bawah cylinder head dapat dilapisi ulang jika terdapat kondisi berikut:

    • Permukaan bawah cylinder head tidak rata sesuai spesifikasi.

    • Permukaan bawah cylinder head rusak oleh pelubangan, korosi, atau keausan.

    Catatan: Ketebalan cylinder head tidak boleh kurang dari 150.8 mm (5.93700 inch) setelah cylinder head dimesinkan.

    Catatan: Dimensi dudukan katup ke permukaan api harus diperbaiki setelah pelapisan ulang cylinder head. Lihat Spesifikasi, "Cylinder Head" untuk mengetahui dimensi yang benar untuk dudukan katup.

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