Doosan D60S-5 - Page 190

Maintenance Section
189
Carriage Chain Adjustment - FFT
Typical example for carriage chain of FFT mast
Make sure that carriage height is correct. if correct,
adjust chain for equal tension. If not, adjust chain for
correct carriage height by adjusting anchor nuts(2).
NOTE: See the previous section, "Carriage Roller
Extrusion" in "When Required" for proper
carriage height.
1. Fully lower the carriage and tilt mast forward or
lift the carriage and put blocks under the
carriage to release the tension from the lift
chains.
2. Remove bolt(3), washer(4) and stopper(5) and
adjust nut(2) to get proper distance from bottom
of inner upright to the bottom of carriage
bearing.
3. Make adjustment anchor nut(2) for equal chain
tension.
4. Set the mast vertical and raise the carriage and
check equal chain tension. If not equal, repeat
the same procedure as step 1 through step 3.
5. Put LOCTITE No. 242 tread lock on the threads
of the anchor nuts(2) after the adjustment is
completed.
Mast Chain Adjustment - FFT
Typical example for FFT mast
Make sure that mast height is correct. If correct,
adjust chain for equal tension. If not, adjust mast
chain for correct mast height by adjusting anchor
nuts(6).
NOTE: See the previous section, "Carriage Roller
Extrusion" in "When Required" for proper
inner mast height.
1. Lift the inner mast and put blocks under the
inner mast to release the tension from the lift
chains.
2. Adjust nut(6) to make inner mast bottom flush
with outer mast bottom.
3. Make adjustment anchor nut(6) for equal chain
tension.
4. Raise the inner mast and check equal chain
tension. If not equal, repeat the same procedure
above step 1 through step 3.
5. Put LOCTITE No. 242 tread lock on the threads
of the anchor nuts(6) after the adjustment is
completed.