Landoll Bendi B40i4, Руководство по обслуживанию

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3-24 F-581-R1
TROUBLESHOOTING AND CORRECTIVE MAINTENANCE
3. Apply the parking brake and block all wheels.
4. Relieve hydraulic pressure in the system by turning
the steering wheel two times to the left, then two
times to the right and move both joysticks in both
directions.
5. Set the key switch to “OFF” and remove the key.
6. Support the front end of the truck (between the front
rotation arm and the truck frame) using support
stands or blocks of wood capable of handling the
weight.
7. Connect a strap from the overhead crane around the
top center cross member of the mast and apply slight
tension only. See Strap Figure on page 3-18. Also
see “Removing the Mast From the Truck,” on
page 3-18.
8. Remove the steering potentiometer, potentiometer
bracketand potentiometer rod.
9. Remove all screws in the top Ringfeder bearing.
Screw these into thier adjacent threaded holes to
push-off the outer ring.
10. Remove the bearing and set aside on a clean
surface.
11. Remove the upper bearing spacer and pry bearing
upwards.
12. Remove the four hex head screws holding the Upper
actuator mount in place and remove mount.
13. Repeat step 9, 10 and 11 for the bottom Ringfeder
bearing.
14. Remove hoses and cap to prevent spills.
15. Replace or repair the actuator and reassemble in
reverse order.
Figure 3-9: Rotation Assembly
Hints for Reassembly
1. To install the actuator, you must align all parts. The
overhead crane may have to be adjusted a fraction of
an inch to allow the actuator to slide in place.
2. Remember to install the bottom spacer before you
move the front end weldment back into place.
3. Starting at the top of the assembly, carefully install
the steer actuator. Align the shaft bottom through
hole to the hole in the front plate weldment yoke. See
Figure 3-9
4. Port P2 should be above port P1.
5. The Ringfeder bearings should be completely
bottomed out in their respective pockets. If they
aren’t, reposition as necessary.
6. Tighten all ringfeder locking screws alternating sides
(like a car’s lug nuts) and torque to 30 ft lb (40.7 Nm).
7. Loosen plugs in P1 and P2 and slowly rotate the
actuator 90°, until the ports face directly forward
(towards the mast) and retighten P1 and P2.
8. Install the 3/4-16 hex head screw and hardware.
Tighten and torque accordingly, see page 1-19.
9. Install the top portion of the assembly. Tighten and
torque accordingly, see page 1-19.
10. Apply additional grease at the two grease fittings.
See page 1-16 for recommended lubrication.
Stop Block
The rotation stops act as a cushion when the front end
is turned the full 180° in either direction, See Figure 3-10
The rotation stop is replaced by simply removing the
hex socket screw (3/8”-16).
Figure 3-10: Stop Block
Steer (Front Rotation) Pot
The steer (front rotation) sensor potentiometer is
replaced as a complete unit and is electrically checked,
See Figure 3-11.
For any troubleshooting and calibration information, see
Chapter 4.