TBM TB1101, Instruction Manual

Page: 45 / 49

45
Load slips or drifts
while being low-
ered.
- Dirt or corrosion foreign ma-
terial in hoist components.
-
Brake is slipping. Friction
disc are worn from long-term
use, or are damaged from
overloading or misuse.
- Contact an authorized service
center or qualified inspector for
inspecting and correcting the
problem.
Keep hoist clean and lubricated.
- Contact an authorized service
center or qualified inspector for
disassembling and replacing fric-
tion disc. See chapter
INSPECTION for minimum allow-
able thickness. Do not overload
hoist.
The chain is tight
when lifting, even
without a load. (A
squeaking noise
can be heard at
times.)
-
Worn gear teeth or worn
bearing. Unless maintenance
is performed regularly,
greased parts will dry, result-
ing in wear and damage,
and improper meshing of
gears.
-
Contact an authorized service
center or qualified inspector for
disassembling and replacing the
pinion, load gear, gear case, side
plate and ball bearing.
Load drops the
instant lowering is
started.
- The braking surface is dirty.
During assembly, the brak-
ing surface must be wiped
clean of dirt.
- The braking surface is oily.
The braking surface must not
be allowed to become soiled
with grease or machine oil
because it is a dry-type
brake.
- Clean or contact an authorized
service center or qualified in-
spector for replacing the brake
assembly.
- Clean or contact an authorized
service center or qualified in-
spector for replacing the brake
assembly.
Hoist will not
lower load.
-
The brake has caught. (Hoist
was left under load condition
for extended period, or was
shock-loaded while operat-
ing.)
-
Brake components are cor-
roded or damaged.
-
Place selector lever in DOWN
position and pull hard on the
lever handle to re-set the brake.
Resume operation.
-
Contact an authorized service
center or qualified inspector for
disassembling and replacing
components;
Keep hoist clean and lubricated.
The chain is tight
when Iifting, even
without a load. (A
squeaking noise
can be heard at
times.) Gear teeth are worn. From
long-term use, or for not be-
ing greased regularly.
- Contact an authorized service
center or qualified inspector for
disassembling and replacing the
load gear, gear case and side
plate.