Three-Stage Mast Assembly
4000 SRM 482
FREE-LIFT CYLINDER, REMOVE AND
INSTALL
NOTE:
Cylinder seals can be replaced without remov-
ing the cylinder from the mast assembly.
NOTE:
The following procedure describes how to re-
move the free-lift cylinder without removing the car-
riage or mast assembly from the lift truck. If the car-
riage has been removed, perform only Step 4 through
Step 12 to remove and install the cylinder.
1.
On reach units, operate the REACH/RETRACT
control button to retract the forks fully.
Use
safety chains to fasten the parts of the reach
carriage so that the forks cannot extend.
2.
Raise the carriage approximately 60 cm (2 ft).
Use safety chains between the carriage and inner
weldment to prevent the carriage from lowering.
Operate the LIFT LOWER control to retract the
free-lift cylinder.
3.
If installed, remove the load backrest extension
as described in Load Backrest Extension, Re-
move and Install.
4.
Fasten the free-lift chains so they cannot move
over the sheaves. Remove the cotter pins from
the pins that fasten each free-lift chain to the
chain anchor at the free-lift cylinder. Carefully
remove these pins. This removal procedure will
not change the chain adjustment.
5.
If there are also hose and cable sheaves in the
sheave support, disconnect the carriage hoses
at the free-lift cylinder. Install caps on the hy-
draulic fittings.
Disconnect the spring of the
cable tension device. See Figure 18, Figure 19,
and Figure 20.
6.
Lift the sheave support assembly out of the free-
lift cylinder and put the lift chains, hoses, cable,
and sheave support over the carriage or fasten
them out of the way.
7.
Hold the LIFT/LOWER control in the LOWER
position for approximately 5 seconds to retract
the free-lift cylinder rod fully and to remove all
hydraulic pressure. It may be necessary to push
the rod into the cylinder while the control is in
the LOWER position.
WARNING
Make sure that the power is off and the key is
removed. Put a DO NOT OPERATE tag in the
operator’s compartment. Disconnect the bat-
tery and put a tag or lock on the battery con-
nector.
8.
Loosen, but do not remove, the nuts for the main-
lift chains at the chain anchors near the top of the
outer weldment. The inner weldment will lower
so that the free-lift hose does not have tension.
9.
Disconnect the hydraulic hose from the free-lift
cylinder and install caps on the fittings.
Legend for Figure 20
NOTE:
COMPONENTS IN BOXES - STANDARD WITH SIDESHIFT OR REACH.
A.
REAR VIEW
1.
HOSE SHEAVE
2.
ELECTRICAL CABLE SHEAVE
3.
SPACER
4.
WASHER
5.
CAPSCREW
6.
CHAIN SHEAVE FOR MAIN LIFT
7.
HOSE GUARD
8.
SNAP RING
9.
INTERMEDIATE WELDMENT
10. INNER WELDMENT
11. HOSE AND CABLE SHEAVE ASSEMBLY AT
SHEAVE SUPPORT
12. ELECTRICAL CABLE (REACH ONLY)
13. TO SHEAVE SUPPORT AND CARRIAGE
14. TENSION DEVICE FOR ELECTRICAL CABLE
15. MANIFOLD BLOCK
16. TO TRUCK
17. FREE-LIFT CYLINDER
18. HYDRAULIC HOSE FROM SHEAVE SUPPORT
19. HYDRAULIC HOSE TO CARRIAGE
26
Содержание MAST N30XMH
Страница 14: ...Two Stage Mast Assembly 4000 SRM 482 Figure 10 Two Stage Mast Assembly Dual Lift Cylinders 10 ...
Страница 16: ...Two Stage Mast Assembly 4000 SRM 482 Figure 11 Two Stage Mast Assembly Single Lift Cylinder 12 ...
Страница 21: ...4000 SRM 482 Two Stage Mast Assembly Figure 15 Hose and Cable Assemblies Two Stage Mast Dual Lift Cylinders 17 ...
Страница 27: ...4000 SRM 482 Three Stage Mast Assembly Figure 18 Three Stage Mast Assembly 23 ...
Страница 34: ...Three Stage Mast Assembly 4000 SRM 482 Figure 21 Hose and Cable Assemblies Outer Weldment 30 ...
Страница 51: ......
Страница 52: ...TECHNICAL PUBLICATIONS 4000 SRM 482 4 08 11 06 5 04 4 03 5 02 5 98 12 95 4 92 2 92 Printed in U S A ...
