41
Figure 42. Chain lock installation.
Caution!
Check the roller chain tension on a new machine after the first day of driving.
Hydraulic repairs
The trouble-free, safe use of the machine requires that the tractor and work machine hydraulic control
devices are in proper working order. If the hydraulic tubes or connectors become damaged during use,
these should be replaced without delay. Ensure that no impurities enter the hydraulic system during
maintenance or when connecting rapid-release connectors.
Two return valves are installed with the three-way valve for controlling raising and lowering, see Fig. 31,
and these function to stop the machine lowering or rising when the three-way valve is in operation. If the
machine rises or lowers even if the three-way valve is closed, there may be a malfunction associated with
the return valves. The return valves are built into the three-way valve, and for this reason the 3-way valve
must be replaced in such instances.
Changing of tires and checking the air pressure
The support wheels are divided into blocks. There are two blocks in the HKL 3000 JC, and three in the
HKL 4000 JC. Each block has one or two wheel packages respectively, see Fig. 43.
When replacing a tire, the wheel package of the block in question must be disconnected. This is done by
loosening the bearing housing mounting nuts (M16) and raising the wheels by approx. 10 cm with a jack.
This allows the axle to be removed together with the wheels to descend and thus be removed from
underneath the machine. In order to facilitate this work, the adjustment joints must be locked by setting the
restriction flat bar to its locked position, see Fig. 4. The wheel rods are mounted to the axle by means of
hexagonal screws.
WARNING!
The machine must be carefully supported when changing a tire. Risk of crushing!
Working, replacement or changing a wheel must be performed in a workshop.
When reassembling the axle, the axle must be carefully lubricated with Vaseline and rust-preventive oil in
order to facilitate further subsequent disconnection. Ensure during reassembly that the bearing housing
sleeves are all on the same side that they were before disconnecting the bearing housings from the axle.
Remember to release the adjustment joint restriction flat bar from its locking position.
Chain direction of travel
