Block
Adjustment Plate
Securing Screw (4)
6.
Repeat steps 3, 4, and 5 to adjust remaining hard
stop at opposite side of turntable chassis. Moun-
ting plate rotation may be necessary several
times for fine adjustment of both hard stops to
obtain proper alignment between receiver holes
and locking pin.
7. Tighten bolts that secure adjustment plates to
hard stop mounting plates.
8. Be sure that adjusting screws are tight against
rear of both base blocks; tighten all adjusting
screw jam nuts.
4
-
9. ADJUSTMENT
OF
PRESSURE
SWITCH
FOR ACCUMULATOR
(Figure 4-9)
-
The turntable
hydraulic system is equipped with a pressure switch for
sensing minimum and maximum fluid pressure in the
accumulator. The accumulator supplies pressurized
fluid to the various hydraulic functions during turntable
operation for a pressure range set at the pressure
switch.
The switch energizes the pump motor at a minimum
pressure which causes fluid to flow until maximum fluid
pressure is restored in the accumulator. The switch
deenergizes the motor at a maximum pressure setting,
and the accumulator begins supplying pressurized fluid
to the various hydraulic functions again.
The lower and upper limits of the
pressure range that the pressure switch energizes and
deenergizes the pump motor are 950 psi (6550 kPa) and
1250 psi (8618 kPa) respectively. If the pressure range
limits are incorrect, turntable hydraulic functions will
not operate propedy and damage may occur to turn-
table components.
To adjust pressure switch range limits, proceed as
follows:
WARNING:
ELECTRIC SHOCK
can kill; MOVING
PARTS
can cause serious injury.
•
Do not touch live electrical parts.
•
Keep clear of pinch points.
Turntable operation is required to properly adjust
pressure switch.
1. Remove front cover from turntable chassis.
2. Manually run the program for rotating mounting
plate using the
BLOCK FORWARD CON-
TINUOUS mode until pressure switch energizes
and deenergizes the pump motor, and note
minimum and
maximum
pressure gauge
readings.
Jam
Nuts
TC-120 287
Figure 4
-
8.
Components Of Hard Stop Assembly
OM-890 Page 19
