TM5-3820-256-10
3-8. Drawworks. Troubleshooting procedures for the drawworks are listed in table 3-4.
a. The table lists the common malfunctions that you may find during the operation or maintenance of the
drawworks. 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 3-4. Troubleshooting the Drawworks
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
WIRE ROPE WILL
Check to see if hoist drum
Operate hoisting drum con-
NOT SPOOL OFF
clutch and brake are re-
trol and hoisting brake lever
HOIST DRUM.
leased.
together to release clutch
and brake. Do not allow
suspended load to free-fall.
2.
HOIST DRUM BRAKE
Check to see if hoist drum
Firmly grasp hoisting brake
DOES NOT HOLD
brake is fully set.
lever, squeeze ratchet re-
SUSPENDED LOAD.
lease, pull hard on brake
lever, let go of ratchet
release, then let go of brake
lever.
3.
HOIST DRUM DOES
Step 1. Check to see if
Operate hoisting drum con-
NOT HOIST SUSPEND-
hoist drum brake is set too
trol and hoisting brake lever
ED LOAD.
tightly.
together to engage clutch
and slip brake. Do not allow
suspended load to free-fall.
Step 2. Check to see if
Move drawworks power con-
drawworks power is on.
trol to ON position, then
release it. Repeat step 1.
4.
WIRE ROPE WILL
Check to see if auxiliary
Operate auxiliary drum con-
NOT SPOOL OFF
drum clutch and brake are
trol and auxiliary brake lever
AUXILIARY DRUM.
released.
together to release dutch and
brake. Do not allow suspend-
ed load to free-fall.
5.
AUXILIARY DRUM
Check to see if auxiliary
Firmly grasp auxiliary brake
BRAKE DOES NOT
drum brake is fully set.
lever, squeeze ratchet re-
HOLD SUSPENDED
lease, pull hard on brake
LOAD.
lever, let go of ratchet re-
lease, then let go of brake
lever.
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