DRAGLINE OPERATION
DRAGLINE OPERATION REQUIRES A HOISTING AND AN INHAUL CABLE. THE INHAUL CABLE IS ON THE R.H.
DRUM THE HOISTING CABLE ISON THE L.H. DRUM. LIFT THE BUCKET BY ENGAGING THE L.H. CLUTCH LEVER
AND RELEASING L.H. BRAKE AND AT THE SAME TIME RELEASING R.H. BRAKE PEDAL TO ALLOW BUCKET TO
SWING OUT UNDER THE BOOM POINT AS IT IS BEING LIFTED. AFTER BUCKET IS IN DESIRED POSITION, SET
BOTH BRAKES AND DISENGAGE L.H. CLUTCH. TO DROP BUCKET FOR DIGGING,-RELEASE THE L.H. BRAKE.
TO DIG WITH THE BUCKET, ENGAGE THE RH. CLUTCH AND RELEASE THE RH. BRAKE AS THE BUCKET IS
BEING PULLED TOWARD THE MACHINE. IT WILL NOT FILL UNLESS ADDITIONAL CABLE IS RELEASED FROM
L.H. DRUM. THIS IS ACCOMPLISHED BY RELEASING L.H BRAKE. WHEN BUCKET IS FILLED, DISENGAGE RL.
CLUTCH WHILE SETTING R.. BRAKE. ENGAGE L.H. CLUTCH AND RELEASE L.H. BRAKE TO HOIST BUCKET
FROM THE CUT AND TO RAISE BUCKET TO THE DUMPING POSITION. HOWEVER. TOO MUCH SLACK WILL
ALLOW BUCKET TO DUMP EARLY. TO DUMP BUCKET COMPLETELY, RELEASE RH. BRAKE PEDAL.
CLAMSHELL OPERATION
TO RAISE BUCKET, ENGAGE BOTH R.H. AND L.H. CLUTCH LEVERS AND SIMULTANEOUSLY RELEASE R.H. AND
L.H. BRAKE PEDALS WHEN BUCKET REACHES DESIRED POSITION, SET R.H. AND L.H. BRAKE PEDALS WHILE
DIS ENGAGING CLUTCHES AT THE SAME TIME. TO OPEN AND LOWER BUCKET, RELEASE R.H. BRAKE PEDAL
FOR OPENING AS THE BUCKET IS OPENING, RELEASE L.H BRAKE PEDAL FOR LOWERING. THE RATE OF
OPENING AND LOWERING OF BUCKET IS CONTROLLED BY PRESSURE APPLIED TO BRAKE PEDALS AFTER
THE BUCKET HAS BEEN SET IN THE GROUND, ENGAGE R.H. DRUM CLUTCH THIS WILL CLOSE BUCKET. IF
ADDITIONAL CABLE IS NOT LET OUT FROM L.H. DRUM THE BUCKET WILL RAISE AS IT CLOSES AFTER BUCKET
HAS CLOSED, ENGAGE L.H. DRUM CLUTCH TO RAISE. WHEN BUCKET HAS RAISED TO DESIRED HEIGHT, SET
BOTH BRAKES AND AT THE SAME TIME, DISENGAGE BOTH CLUTCHES TO OPEN BUCKET RELEASE L.H. BRAKE
PEDAL.
NOTE: TO REMOVE POWER LOAD LOWERING DRIVE CHAIN REFER TO PAR. 4-108.
ME 3810-232-12/2-27(2)
Figure 2-27. Crane operating instructions. Sheet 2 of 2.
Section V. OPERATION UNDER UNUSUAL CONDITIONS
(2)
When using OES oil in the crankcase
2-19. Operation in Extreme Cold a. General. Special
the oil level must be checked frequently as oil
precautions must be taken when operating the crane and
consumption may increase.
carrier in the extremely cold temperatures.
As
(3) Oil may require changing more frequently than
temperatures drop below the freezing point metal and
usual because contamination, dilution, and sludge
rubber parts become progressively more brittle and a
formation will increase under cold weather operating
relatively minor shock or jar may cause them to crack or
conditions.
break. Warm the machine slowly and start all operations
c. Cooling Systems. Before pouring antifreeze solution
in low gear. Avoid jerky handling and sharp impacts.
into the radiator, observe these precautions.
(1)
Drain the cooling systems by opening all
WARNING
cocks.
(2) Drain and flush the radiator with clean water.
Personnel should use care to keep from spilling
(3) Inspect the entire system for leaks. Make sure
fuel, coolant, or other liquids upon themselves.
that all clamps are tight and the draincocks closed.
Exposed parts of the body should not come in
(4) Add antifreeze as necessary. Refer to TB ORD
contact with metal during cold weather as
651 when filling the radiator with antifreeze solution.
serious and painful injury may result.
d. Electrical System.
b. Lubrication.
(1)
Keep the batteries fully charged at all
(1) Refer to the Lubrication Order for special
times.
0
lubricants to use below -10 F.
2-44
