Three-Stage Mast Assembly
4000 SRM 482
Carriage Sheaves
Remove the sheaves for the hoses and cable to the
carriage as follows:
1.
Fully lower the carriage. Fully retract the forks
if the reach carriage is installed. Install safety
chains between the tops of the inner and outer
carriage weldments of the reach carriage to pre-
vent carriage operation.
2.
Make sure that the system does not have hy-
draulic pressure.
Hold the control (for each
function) in the FORWARD position for approx-
imately 5 seconds to release the pressure. Make
sure the hydraulic pump does NOT operate.
Move the key to the OFF position. Disconnect
the battery and put a tag or lock on the battery
connector.
3.
Fasten the carriage hoses and electrical cable, if
installed, to the top of the sheave support at the
free-lift cylinder. Disconnect or remove the hoses
at the carriage. Install caps to prevent dirt from
entering the hydraulic system.
4.
Install tags on the connectors and wires of the
electrical cable at the carriage for correct connec-
tion later. Disconnect the electrical cable.
5.
Install tags on the hydraulic hoses at the carriage
for correct connection later. Disconnect the hoses
and install caps to prevent dirt from entering the
hydraulic system.
6.
Remove the two capscrews and nuts that fasten
the two halves of the hose and cable sheave to-
gether. See Figure 20. Do not let the sheave
halves fall.
7.
Carefully remove the capscrews that fasten the
hose and cable sheaves at the top of the interme-
diate weldment. See Figure 20. Do not let any of
the parts fall. These capscrews fasten to the stub
shafts of the chain sheaves.
8.
Follow the reverse procedure to install the hose
and cable sheave for the carriage. Make sure
to operate the carriage hydraulic function(s) and
check for leaks after the hoses are connected.
THREE-STAGE LIFT CHAINS, REMOVE
AND INSTALL
General
WARNING
Keep control of the lift chains when discon-
necting them from the chain anchor.
This
procedure will prevent the lift chains from
falling and causing injury or damage.
WARNING
Never replace only the worn section of a lift
chain. Replace the complete chain. Never re-
place only one chain of a chain pair. Replace
both chains.
Read and follow the Safety Procedures When Work-
ing Near Mast as well as all WARNINGS and CAU-
TIONS. See Figure 18 and Figure 19.
Free-Lift Chains
1.
Operate the LIFT/LOWER control to raise the
carriage. Use safety chains to fasten the carriage
so that it cannot move and the forks are approx-
imately 60 cm (2 ft) off the floor.
2.
Lower the carriage so the safety chains are the
support for the carriage and the lift chains do not
have tension.
NOTE:
Removing the pins at the chain anchors
will disconnect the lift chains without changing the
chain adjustment. Always adjust the chains if new
lift chains or other components are installed.
3.
Fasten both free-lift chains so they cannot move
over the sheaves of the sheave support. Remove
the chain anchor pins at each end of both free-lift
chains. Hold each chain to keep it from moving
too fast and carefully remove them.
4.
Inspect the free-lift chains as described in Lift
Chains Check. Replace the free-lift chains if nec-
essary.
5.
Reverse the procedure to install the free-lift
chains.
6.
Adjust the free-lift chains as described in Adjust
Free-Lift Chain (Three-Stage Only).
32
Summary of Contents for MAST N30XMH
Page 14: ...Two Stage Mast Assembly 4000 SRM 482 Figure 10 Two Stage Mast Assembly Dual Lift Cylinders 10 ...
Page 27: ...4000 SRM 482 Three Stage Mast Assembly Figure 18 Three Stage Mast Assembly 23 ...
Page 34: ...Three Stage Mast Assembly 4000 SRM 482 Figure 21 Hose and Cable Assemblies Outer Weldment 30 ...
Page 51: ......
