OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER
OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER
OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER
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273<br />
the variable delivery pumpto a position slightly <strong>of</strong>fset towards<br />
the hoisting position, are located on the top <strong>of</strong> the pumphousing.<br />
A limit switch is also mounted on the upper housing, to<br />
prevent the starting <strong>of</strong> the electric motor, unless the pump<br />
has been returned to its centered position. The splined input<br />
shaft <strong>of</strong> the pump is at the top <strong>of</strong> the pumphousing and<br />
is arranged with connecting shaft coupling to the motor as<br />
described above. Other elements <strong>of</strong> the A-end are as indicated<br />
in the subparagraphs below.<br />
(a) Mounted on the side <strong>of</strong> the upper housing is<br />
the valve block and control levers. This is<br />
a subassembly which consists <strong>of</strong> a ItServo Controlled"<br />
pumpyoke operating piston, and solenoid<br />
and lever operated valves for oontrolling<br />
the various phases <strong>of</strong> the cycle. The piston<br />
islinkea to the pumpyoke, so as to provide<br />
means for <strong>of</strong>fsetting the pumpyoke either by<br />
ItServolt power, or by a direct mechanical con~<br />
nection to the operator's control lever.<br />
(b) The pumphousing is assembled to a welded steel<br />
galvanized storage tank for oil. Access to<br />
the tank is through openings, covered by removable<br />
inspection plates mounted on the ends<br />
<strong>of</strong> the tank.<br />
(C) Mounted on the side <strong>of</strong> the storage tank is<br />
found the oil filter assembly. This consists<br />
<strong>of</strong> two filter units mounted in removable containers.<br />
A valve is also in the assembly,<br />
which when in its centered position allows<br />
control pressure oil to be pumpedthrough both<br />
fil ters. Whenthe lever is turned either to<br />
the right or left, one <strong>of</strong> the filters is cut<br />
out <strong>of</strong> the circuit. Filters may be removed<br />
for cleaning without interfering with the normal<br />
operation <strong>of</strong> the hoist.<br />
(d) The storage tank provides the mounting f'e et<br />
through which bolts are used for securing the<br />
uni t in the turret. A drain plug is located<br />
on the end <strong>of</strong> the tank to pro-ride for draining<br />
the A-end. The oil filler cap is located on<br />
the side <strong>of</strong> the steel housing and oil level<br />
pet cocks are provided for determining the<br />
correct oil level.<br />
(e) The complete assembly <strong>of</strong> the A-end is such<br />
that it can be dismantled in order that its<br />
component parts may be passed through an
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