OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER

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79. Adjustment for flifj,ht l eng t ti . - After all of the
preliminary tests have been made and the equipment is functioning
correctly, both hydraulically and electrically, the
electric motor is to be stopped. The cable is to be attached
to the B-end hoist drum. The drum size will permit one extra
coil more than is required for maximumlift (53 ft.). Adjustments
of limit switch car stopping positions as described below
are made without the B-end cams and the car is operated
at slow speed into the limit switches. (Note: nSlow" speed
desired is car movement of si~ inches per second.)
(a) To adjust upper limit switch #9. - With car
at bottom, motor on, door-s open, switches #J+
and #5 blocked closed, movethe starting lever
to "Start" and the control lever to s Zow 120 is t
As soon' as #7 switch closes release starting
lever. Permit the car to run into switch #9.
Verify car position and adjust the cam on the
car to give the desired position (for six-inch
per sec. ~peed). -
The limit switches are adjustable for opening
or closing by varying the position of the
switch operating lever. This is accomplished
by loosening the lock nut on the lever clamp
.boLt , Turn the clamp bolt until the desired
position of the lever is obtained, and then
tighten the lock nut. The adjustment on the
cam and the adjustment on the switch may be
used in conjunction, to give a correct switch
setting.
(b) To adjust the lower u n l oati i ng e t a t i on eun t c ti #8-
After switch #9 has been adjusted, the starting
handle is to be moved to the "Start" position,
and the control lever is to be moved
slightly towards the "Lower" position. After
the car has lowered a few inches, or just
enough to close switch #9, the starting handle
is to be released,· to return to the stop position,
before the car reaches the lower unloading
station. The car is to be lowered at a
speed of approximately six inches per second
into the #8 switch. The position of the stopped
car is to be checked in relation to the
intended stopping position. The switch lever
and operating cam are to be adjusted to give
the desired stopping position, in the same way
as for the #9 switch.
(c) To adjust the Lo ad i ng station switch #7. - After
switch #8 is adjusted the powder car is to