
Small Medium HEX 4
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Professional Development
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Di 320 NGH, pilot pressure dihasilkan oleh:
Suplai aliran Main hydraulic pump 1
Pilot pump yang terdapat pump compartment
Main hydraulic pump 2 yang direduksi oleh PRV
External pump yang diambil dari tangka tambahan
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Proportional Reducing Valve Solenoid berfungsi untuk:
Mengatur downstream pressure ke spool
Mengatur pembukaan tekanan oli ke tangki
Membuka jalur menuju ke return oil manifold
Menyupali oli ke main system ketika terjadi penurunan tekanan
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
320D Implement low cycle time hanya pada saat beroperasi secara kombinasi terus menerus,
salah satu kemungkinan penyebabnya adalah:
Setting pilot relief low
Pilot pump problem
Hydraulic lock out valve stuck
Pilot accumulator fail
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Proportional solenoid valve pada NGH dioperasikan oleh ECM dengan signal:
Analog
CAN Bus
Pulse Width Modulation
Data link
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resolver block menjadi pertemuan antara pilot lines ke joysticks dan pilot lines main control valve
group dan juga sebagai sensing saat ada implement atau swing yang sedang diaktifkan:
Benar
Salah
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada unit 320D2, pompa hidrolik utama dikontrol oleh pump regulator yang menggunakan sinyal
berupa:
Pilot pressure relief valve & Output pump 1 pressure
Line relief valve & Main relief valve
Negative flow control & Differential valve
Power shift pressure reducing valve & Negative flow control
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada unit excavator yang menggunakan sistem LSPC, jika sinyal tekanan Load Sensing
bertambah, maka dampak yang terjadi pada pompa adalah:
Main pump tidak akan terpengaruh
Pilot pump akan mengalami upstroke dan menambah signal pressure
Main pump akan mengalami upstroke untuk menambah flow
Engine mengalami kenaikan rpm
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