Yuantai Crane Machinery I&E Co., Ltd. is the professional export department of our own factory specialized in all kinds of hoists & cranes. We supply overhead crane,gantry crane,jib crane,crane parts,port crane,electric hoist! Our cost performance is high,the quotation and the transportation way,belive that will make you satisfied. Welcom to inquiry! Tel： 86-371-65862089 skype: cherry.swallow Email: christine@ytcrane.com Web: http://www.ytcrane.com

1. Explore the two-speed electric hoist
components and considerations

2. YT two-speed electric hoist
composition and precautions
• The main part of the two-speed wire rope hoist include: reducer, running mechanism, drum equipment, hook devices, couplings, flexible cable
current is introduced, limit and so on.
• A new installation or installed after dismantling the two-speed electric hoist model MD1, first of all should be empty commissioning times. But before
installation, commissioning should not energized.
• Should be carried out before the two dual-speed electric hoist used normally to 125% of rated load, lifting off the ground about 100 mm, 10 minutes
of static load test to check whether it is normal.
• 3 dynamic load test based on rated load weight, lift and move around as repeated testing, inspection after the test mechanical transmission parts,
electrical parts and the connecting portion is normal and reliable.
• 4 two-speed electric hoist in use, do not allow the absolute prohibition in the environment and exceed the rated load and nominal closing per hour
(120 times) the case.
• 5 When installation and maintenance, must be strictly checked stopper is flexible, reliable, rose to the upper limit when the hook position, the hook
shell casings from the reel to be greater than 50mm (10t, 16t, 20t must be greater than 120mm). When the hook dropped lower limit position,
should ensure the safety rope on the drum circle, circle must be safe and effective in more than two laps.
• 6 are not allowed to make a flashlight while pressing the shutter button two hoist movement in the opposite direction.
• 7 After the completion of the work necessary to supply the total gate opened, cut off the power.
• 8 two-speed electric wire rope hoist manipulated by hand, the operator should fully understand the safety rules prohibited pulled oblique hanging
crooked.
• 9 in use must be regularly checked by a specialist hoist personnel, failure to take timely measures found, and recorded carefully.
• 10 When two-speed electric hoist brake adjustment volume decline, should ensure that the rated load, the amount of brake slipped S ≤ V/100 (V
load the next minute steady lifting distance).
• Retirement standard 11 two-speed hoist rope: rope inspection and discard criteria by CB/T5972-1986 "wire rope lifting machinery inspection and
scrap of practice" implementation.
• 12 dual-speed electric hoist in use must keep enough oil and keep oil clean and should not contain impurities and dirt.
• 13 oiled rope should be used when a stiff brush or a small piece of wood, prohibited direct hand rope to a working oil.
• 14 dual-speed electric hoist does not work, do not allow the air hanging heavy objects to prevent permanent deformation parts.
• 15. Use should pay particular attention to the situation of wearing parts. During use, if you find a fault, immediately turn off the main power.
• 16.10 to 20 ton electric hoist after long continuous operation, automatic power-off phenomenon may occur, which is a function of the motor
overheating protection, then you can drop over a period of time, you can continue to work until after the motor cool down.

3. Cantilever crane hoist accessories
maintenance requirements
• A new installation or demolition after inspection by the hoist installation, commissioning should
first be empty several times. But before installation, commissioning should not energized.
• (2) before normal use should be 125% of the rated load, electrical chain hoist lifting off the ground
about 100 mm, 10 minutes of static load test to check whether it is normal.
• 3 dynamic load test based on rated load weight, lift and move around as repeated testing,
inspection after the test mechanical transmission parts, electrical parts and the connecting portion
is normal and reliable.
• 4 In use, the absolute prohibition in the environment are not allowed, and exceed the rated load
and nominal closing per hour (120 times) the case.
• 5 When installation and maintenance, must be strictly checked stopper is flexible, reliable, rose to
the upper limit when the hook position, the hook shell casings from the reel to be greater than
50mm (10t, 16t, 20t must be greater than 120mm). When the hook dropped lower limit position,
should ensure the safety rope on the drum circle, circle must be safe and effective in more than
two laps.
• 6 are not allowed to make a flashlight while pressing the shutter button two electric hoists
movement in the opposite direction.
• 7 After the completion of the work necessary to supply the total gate opened, cut off the power.
• 8 hoist manipulated by hand, the operator should fully understand the safety rules prohibited
pulled oblique hanging crooked.
• 9 in use must be regularly checked by a specialist hoist personnel, failure to take timely measures
found, and recorded carefully.

4. Precautions hoist loading bundles
• 1, when loading, to make the center of gravity and coincident
mechanical flatbed shall not overloaded, electric hoist chain wide,
high, experienced personnel to work by loading the bundled.
• 2, the fixed connection oversized objects and dedicated flatbed
with Φ18.5MM rope buckle with M20 bolt and flower column
above the inverted chain with fixed, track and share flatbed No. 8
wire and then 2-4, before and after the two tied loading must be
twisted when bundled with a multi-strand wire tight to pull its
weight to ensure that each strand force uniform.
• 3, when bundled lifting prohibited bundled in bundles of wearing
parts or can not withstand the force above all exposed parts of the
mating surfaces, explosion proof wire rope hoist edges and
protruding shaft head precision parts to be packaged to protect
against collision damage or transportation accidents.