Harrington Hoists and Cranes Static/Dynamic Hoist Load Tester - Manual (Page 10)

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1.3 Assembly of dynamic hydraulic system to hoist load tester frame, drawing 50924
a.) Remove dynamic hydraulic system from the shipping crate using a forklift or
crane.
b.) Select the dynamic option hardware packet, the front support, item 4 , and the
DHLT stand cover, item 6 page 23.
c.) Attach the front support, item 4 , as shown on drawing 50924 to the base as
sembly of the load tester frame using two (2) M12x40mm long bolts, item 18 ,
two (2) M12 "U" taper washers, item 19 , two (2) M12 lock washers, item 20 ,
and two (2) M12x1.75 nuts, item 21 , as shown on drawing 50924. Tighten
securely before proceeding to the next step.
d.) Lower the dynamic hydraulic system assembly orienting the accumulator end
according to drawing 50924. Fasten the system by inserting two (2) M12x40mm
long bolts, item 18 , through the rear mounting holes in the pump base and
through the holes in the mounting angle, item 6 , at the rear of the tester base ,
see Figure #1 and drawing 50924. Secure by placing two (2) M12 lock washers,
item 20 , and two (2) M12x1.75 nuts, item 21 , onto the M12 bolts, item 18 , and
tighten.
e.) Refer to parts "c" and "d" of section 1.2 for installation of cylinder assembly.
f.) Attach the pressure gauge/adjusting valve to the appropriate location using two
(2) M10x75 long bolts, item 25 , two (2) M10 lock washers, item 12 , and two (2)
M10x1.5 nuts, item 13 , as shown on drawing 50924 page 23.
g.) Attach the lower arm limit switch assembly, item 39 , to the base of the test stand
using two (2) M8x20 socket head cap screws, item 40 , and two (2) M8 lock
washer, item 16 , as shown on drawing 50924 page 30. Set the cam roller of
the limit switch so it will activate the limit switch as the lower beam assembly is
lifted and before the cylinder is fully extended. The measurement of the length
of the rod that is extended when the limit switch is activated is approximately
4 1/2".
h.) Attach the electrical enclosure, item 5 , to the mounting bracket on the vertical
column using four (4) 1/4-20x1 1/4" long bolts, item 6 , four (4) 1/4" flat washers,
item 7 , and four (4) 1/4-20 nuts, item 8 , as shown on drawing 50924.
i.) Remove plug with red tag from pump oil tank and replace with vented cap.
This completes the assembly of the dynamic option of your hoist load tester. Please
refer to the operation instructions for initial set up and operation of your tester.