OPERATING CONTROLS AND PROCEDURES RT765E-2 OPERATOR MANUAL
3-16 Published 4-09-2021, Control # 364-11
When the control handle is pushed in and the superstructure
is directly over the front, the swing lock pin drops into the
socket on the carrier frame, locking the superstructure in
place.
When the control handle is pulled out, the pin is pulled out of
the socket, unlocking the superstructure.
12V Receptacle
This 12 volt accessory outlet (7) (Figure 3-10) is located on
the lower part of the control panel and is designed to mate
with most 12 volt adapter plugs.
Diagnostic Connector
The Diagnostic Connector (8) (Figure 3-10) is located on the
lower part of the front control panel. It is used for servicing
the crane’s electrical system.
A laptop computer with a nine pin cable connector and the
appropriate service software are required. Contact your local
Grove distributor or Manitowoc Crane Care for assistance.
Bubble Level Indicator
The Bubble Level Indicator (9) (Figure 3-10) is located on the
left side of the cab by the door latch plate. The indicator
provides the operator with a visual aid in determining the
levelness of the crane.
Hoist Third Wrap Indicator (Optional—
Standard on CE)
The Hoist 3rd Wrap Indicator (10) (Figure 3-10) is located on
the right side console. The indicator will illuminate red when
three wraps or less of cable remains on either hoist.
Cold Weather Indicator (Optional)
The optional Cold Weather Indicator (11) (Figure 3-10) is
located on the right side console. The indicator comes on
when ambient temperature is at or below -29°C (-20°F). It
serves as a warning for the operator to stop operation in
extreme cold.
Telescope Cylinder Charge Indicator (If
Equipped)
The Telescope Cylinder Charge Indicator (13, (Figure 3-10))
is located on the right side control panel and is part of the
telescope cylinder charge system. The telescope cylinder
charge system is designed to prevent boom retraction due to
thermal contraction under the following operating conditions:
If the crane is operated with a long boom length and low
boom angle, and the hydraulic oil in the telescope cylinders
cools and contracts, the friction forces in the extended boom
will prevent the boom from retracting. Then, if the operator
begins to elevate the boom without telescoping out slightly,
the crane may reach a boom elevation angle where the
weight of the boom sections and load overcomes the friction
forces in the boom sections, causing the boom to retract until
the column of oil inside the cylinders once again supports the
boom sections. The telescope cylinder charge system will
prevent the boom from retracting under these conditions by
automatically replenishing the volume of hydraulic oil lost in
the telescope cylinders due to thermal contraction.
The telescope cylinder charge system operates
automatically and does not require any operator input. The
indicator illuminates amber and the buzzer sounds (2,
(Figure 3-13)) when the boom is elevated above 35° and the
telescope cylinder charge system is not functioning properly.
If the buzzer sounds and the indicator illuminates, the
operator should immediately telescope out slightly to
manually charge the telescope cylinders, stop operation,
then have the system repaired as necessary.
NOTE: The telescope cylinder charge system does not
prevent thermal contraction of hydraulic oil due to a
drop in temperature and will only prevent boom
retraction when the crane’s engine is running and
the boom angle is greater than 35°. The system is
designed only to prevent boom retraction that may
occur due to thermal contraction under the
operating conditions previously described.
Ambient Temperature LED Indicator
The Ambient Temperature LED Indicator (12) (Figure 3-10)
is located on the right side console. When the ambient
temperature outside the crane reaches below -29°C (-20°F)
the LED indicator will illuminate and send a signal to the RCL
system. This temperature control is to prevent operation of
crane lifting functions in temperatures below -29°C (-20°F).
The system will initiate lockout of the following crane
functions: hoist up, boom down, and boom telescope-
extend. Hoist lowering, boom up and boom telescope-retract
along with lockout override, will still be operational to lower
the load.
CAUTION
Swing Lock Damage!
Do not engage the Pin Swing Lock while superstructure is
in motion. Center boom over the front and engage Pin
Swing Lock to prevent superstructure rotation during
travel.
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