TM5-3820256-10
Section IX. PREPARATION FOR MOVEMENT.
2-45.
Preparation for Movement.
a. Drilling Rig.
(1)
Mud pump suction and discharge lines. Be sure there is no pressure on any lines. Disconnect the pump
suction hose and store it on the rig. Disconnect the mast bend hose. Disconnect and store the mud mixer
and hoses. Store the mud pits on the rig tender.
(2)
Mast.
NOTE
The following instructions assume that the rig's engine is running, that all the controls are in the OFF or
neutral position, and that the truck transfer PTO case is engaged.
(a)
Observe the tachometer and set the throttle to the desired engine rpm.
(b)
Make sure all the drill pipe has been removed and properly stored on the rig tender. The kelly must be
retracted in its transport position in the mast.
WARNING
It is very important that you make sure the mast cylinders are full of fluid before you begin lowering the
mast.
(c)
Momentarily operate the mast control to the UP position and check the hydraulic indication on the
pulldown pressure gage. The pressure should rise rapidly when the up side of the mast raising
cylinders are full of hydraulic fluid.
(d)
Open both mast locks at the base of the mast.
(e)
Move the drawworks power control to the ON position.
(f)
Move the mast control to the DOWN position and lower the mast in one continuous operation, while
alternately operating the drum clutch levers to spool-up excess wire rope slack.
(g)
When the mast is resting solidly on the mast supports and all excess wire rope slack has been taken
up, set the drum brake levers, making sure the ratchet locks each in the locked position.
(h)
After lowering the mast and securing it, detach the Retractable Life-line cable from the bottom of the
mast and perform the “After" PMCS while retracting the cable into the life-line housing. Detach the
life-line from the top of the mast and store in dry well ventilated storage area away from corrosive
materials.
Change 5 2-128
