Hydraulic system – 6000 Adjustments

11.3 Adjustments

Adjusting the pressure limiting valve

The pressure limiting valve has been correctly set at the factory, however, adjustment may be required if the valve or the entire hydraulic unit is replaced.

The truck must handle lifts between 1000 and 1050 kg.

1.Locking nut.

2.Adjusting screw, pressure limitation. When turned clockwise, the pressure increases. When turned counterclockwise, the pressure decreases.

3.Pressure limiting valve.

4.Shrinking socket : used to seal the load adjustment setting.

•Remove the schrinking socket.

•Loosen the locking nut (1). Place a load of 1000 kg on the forks and verify that the truck is able to lift this load. If the truck can lift 1000 kg, place an additional 50 kg on the forks. Verify that the truck is able to lift the load.

•If the truck can manage to lift 1100 kg adjust the pressure limiting valve using the adjustment screw (2) by turning it clockwise with a 4 mm Allen key untill it cannot lift the load.

•Mount the locking nut (1) again.

•Place a new schrinking socket (4).

12- Main lift chain system – 7120

12.1 General

Applies to all machines with a mast.

12.2 Checking the chain setting

The lift chains must be adjusted at regular periods due to stretching, see below. The chain setting is checked during servicing as set out in the maintenance schedule.

Any adjustment is made with the chain mounting bolts. Adjust the fork height according to C code 7100, 7420, 7700 and 7800 as applicable.

12.3 Chain inspection

The chains are exposed to two types of wear, outline wear and stretching. Wear to the bolts and disc holes is caused by stretching. The chains are also affected by the environment they are used in.

12.3.1 Noise

If lubrication has been insufficient there will be metallic friction on the chain and this will result in noise. The chain should be replaced.

12.3.2 Surface rust

Surface rust is easy to recognize as the chain will be reddish brown. Deep-seated rust has generally started and the chain has impaired strength.

The chain should be replaced

12.3.3 Rusty links

Fretting corrosion results in a reddish brown powder being visible by the outer discs. It can also appear as if the chain is bleeding when lubricated.

The chain should be replaced.