Doosan D50S-5 Operation & Maintenance Manual page 189

Personal injury can be caused by sudden Personal injury can be caused by sudden
movement of the mast and carriage. movement of the mast and carriage.
Keep hands and feet clear of any parts that can Keep hands and feet clear of any parts that can
move. move.
Lift Chain Adjustmen Lift Chain Adjustment t
Typical example for carriage equal tension Typical example for carriage equal tension
If the tension is not the same on both chains, take If the tension is not the same on both chains, take
the procedure as follows. the procedure as follows.
NOTE: If carriage height is not correct, make NOTE: If carriage height is not correct, make
adjustments by following procedures. adjustments by following procedures.
Carriage Chain Adjustment - FFT Carriage Chain Adjustment - FFT
Typical example for carriage chain of FFT mast Typical example for carriage chain of FFT mast
Make sure that carriage height is correct. if correct, Make sure that carriage height is correct. if correct,
adjust chain for equal tension. If not, adjust chain for adjust chain for equal tension. If not, adjust chain for
correct carriage height by adjusting anchor nuts(2). correct carriage height by adjusting anchor nuts(2).
NOTE: See the previous section, "Carriage Roller NOTE: See the previous section, "Carriage Roller
Extrusion" in "When Required" for proper Extrusion" in "When Required" for proper
WARNING WARNING
carriage height. carriage height.
1. 1. Fully lower the carriage and tilt mast forward or Fully lower the carriage and tilt mast forward or
lift the carriage and put blocks under the carriage lift the carriage and put blocks under the carriage
to release the tension from the lift chains. to release the tension from the lift chains.
2. 2. Adjust nut(1) to get proper distance from the Adjust nut(1) to get proper distance from the
bottom of inner upright to the bottom of carriage bottom of inner upright to the bottom of carriage
bearing. bearing.
3. 3. Make adjustment anchor nut(1) for equal chain Make adjustment anchor nut(1) for equal chain
tension. tension.
4. 4. Set the mast vertical and raise the carriage and Set the mast vertical and raise the carriage and
check equal chain tension. If not equal, repeat check equal chain tension. If not equal, repeat
the same procedure as step 1 through step 3. the same procedure as step 1 through step 3.
5. 5. Put LOCTITE No. 242 tread lock on the threads Put LOCTITE No. 242 tread lock on the threads
of the anchor nuts(1) after the adjustment is of the anchor nuts(1) after the adjustment is
completed. completed.
188 188
Mast Chain Adjustment - F Mast Chain Adjustment - FFT
Typical example for FFT mast Typical example for FFT mast
Make sure that mast height is correct. If correct, Make sure that mast height is correct. If correct,
adjust chain for equal tension. If not, adjust mast adjust chain for equal tension. If not, adjust mast
chain for correct mast height by adjusting anchor chain for correct mast height by adjusting anchor
nuts(6). nuts(6).
NOTE: NOTE: See the previous section, "Carriage Roller See the previous section, "Carriage Roller
Maintenance Section Maintenance Section
FT