Hyster N30-40XMR3 C470, Техника безопасности, техническое обслуживание и ремонт

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4500 SRM 971 Description
Description
The reach carriages are used to extend the reach of
the carriage. There are two types of reach carriages.
There is a single-reach carriage with one set of scis-
sor arms. The other carriage has two sets of scis-
sor arms for double reach. Both carriages have a tilt
cylinder to tilt the forks. Each carriage is also avail-
able with the optional sideshift function. The parts
of the reach carriages are shown in Figure 8 and Fig-
ure 9. The inner and outer frame assemblies are con-
nected by a scissor linkage. The top of the scissor
arm weldment at the inner frame is fastened to the
top of the inner frame by pins. The top of each scis-
sor arm at the outer frame is fastened to the top of
the frame by pins. On double reach units, the ends of
each set of scissor arms and scissor arm weldments
are fastened together by studs with bearings. The
bearings on each pin or stud permit the arms to pivot.
Large bearings at the center pivot of each scissor arm
and scissor arm weldment also permit the linkage to
pivot.
NOTE:
The reach assembly can be removed from the
mast assembly with the load backrest and forks at-
tached. Both the two-stage and three-stage mast as-
semblies can also be removed with the reach assem-
bly installed. Do only those procedures necessary for
repair.
REACH ASSEMBLIES
The reach assembly is used to extend the reach of
the forks. There are two types of reach assemblies.
There is a single-reach assembly with one set of
scissor arms. The other reach assembly has two sets
of scissor arms for double reach. Both reach assem-
blies have a tilt cylinder to tilt the forks. Each reach
assembly may also be equipped with an optional
sideshift function. The parts of the reach assemblies
are shown in Figure 2, Figure 10, and Figure 11.
The rear- and front-frame assemblies are connected
by a scissor linkage. The top of the scissor arm
weldment at the inner frame is fastened to the top
of the inner frame by pins. The top of each scissor
arm at the outer frame is fastened to the top of the
frame by pins. On double-reach units, the ends of
each set of scissor arms and scissor arm weldments
are fastened together by studs with bearings. The
bearings on each pin or stud permit the arms to
pivot.
Large bearings at the center pivot of each
scissor arm and scissor arm weldment also permit
the linkage to pivot.
Two hydraulic cylinders control the reach movement
of the scissor arms. The tilt cylinder controls the
tilt action of the pivot assemblies at the heel of the
forks. The forks pivot on a large pin that connects the
forks to the frame. The sideshift cylinder controls the
movement of the mobile frame assembly and forks.
The bottom arms at the outer frame and the inner
frame have load bearings that fit into channels in the
frame assemblies. The load bearings permit the ends
of the arms to move vertically in the frame channels.
The sideshift carriages have another frame that can
move sideways on the apron. Two bearing blocks at
the top of the apron and two at the bottom reduce
the friction for side to side movement of the sideshift
frame.
The flow of oil to and from the cylinders is controlled
by the electro-hydraulic control valve. The electro-
hydraulic control valve controls the rate and direc-
tion of oil flow. The switches located in the control
handle, when actuated, direct the valve to open and
close to control the rate and direction of oil flow. A
selector valve (2, Figure 2) directs the oil flow from
the reach cylinders to the tilt cylinder, and from the
tilt cylinder to the sideshift cylinder for sideshift op-
eration.
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