28
Note:
(a) Adjust the space of side roller to 0.5mm;
(b) Add grease on the surface of main roller and contact area of mast
Fig.4-20 Position of roller
4.5.4 Forklift fittings
Because different occasions where the forklift is used and various loaded cargos, the common pallet fork with
the single forking function cannot meet the demands of many working conditions. The forklift fittings belong to
one part of the forklift working device. Its rational application makes the forklift a kind of multi-purpose, high
efficient materials handling tool, which can fork, clamp, lift, rotate, move sideway, push and pull or rollover,
and considerably widen the scope of forklift application, enhance the handling efficiency of forklift and
promote the automation development level of material handling industry. There are many types of forklift
fittings with their different performances to meet the requirements of different working environment. Hence the
methods of their classification also vary. According to the oil line needed by the fittings, the fittings are divided
into the mechanic and hydraulic types. The former needs no auxiliary refueling line, the original working device
of forklift possesses the lifting and tilting oil lines, which are fitted with the 2PC valve: E.g.: Through-bar, jib,
foldable pallet fork etc., It is necessary for the latter to be added with an auxiliary refueling circuit (group I or
II). These fitted with the group I of auxiliary refueling circuit is normally referred to "3PC valve fittings" which
possess a single function: these fitted with the group II of auxiliary refueling circuit normally referred to "4PC
valve fittings which have two singles functions and so on. Each time a single function is added, it is necessary
to supplement a group of auxiliary refueling circuit, and one piece of multi-way valve will be added. E.g.: side
shifter (3PC valve fittings), rotating clamp (4PC valve fittings), pusher (3PC valve fittings) etc.
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General