TM5-3820-256-10
Section III. DRILLING RIG TROUBLESHOOTING PROCEDURES
3-5. Mast. Troubleshooting procedures for the mast and mast components are listed in table 3-1.
a. The table lists the common malfunctions that you may find during the operation or maintenance of the mast or its
components. You should perform the tests/ inspections and corrective actions in the order listed.
b. This manual cannot list all malfunctions that may occur, nor all tests/inspections and corrective actions. If a
malfunction is not listed or is not corrected by listed corrective action, notify your supervisor.
Table 3-1. Troubleshooting the Mast
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
MUD PUMP DIS-
Check for loose connec-
Tighten connections.
CHARGE PIPING
tions.
LEAKS.
2.
MAST LIGHTS NOT
Check to see if mast
Turn switch on.
LIT.
lights switch is on.
3.
CHAIN PULLDOWN
Step 1. Check to see if
Set pulldown power control
DOES NOT OPERATE.
pulldown power is on.
to ON position.
Step 2. Check to see if
Move pulldown power con-
pulldown transmission is
trol to OFF; move pulldown
engaged.
transmission lever to HIGH
or LOW position, then re-
turn pulldown power control
to ON.
Rotate pulldown motor con-
Step 3. Check to see if
trol clockwise.
pulldown motor control is
at fully counterclockwise position.
4.
MAST RAISING CYL-
Step 1. Check to see if
Move mast control to UP
INDERS WILL NOT
mast control is in UP posi-
position.
RAISE THE MAST.
tion.
Step 2. Check to see if
Engage the truck transfer
truck transfer case power
case power take-off.
take-off is engaged.
5.
MAST RAISING CYL-
Step 1. Check to see if
Open the mast locks.
INDERS WILL NOT
mast locks are open.
LOWER THE MAST.
Step 2. Check to see if
Move mast control to
mast control is in DOWN
DOWN position.
position.
3-44
