Specifications

5.3.3 Usage of the steering unit

(1) Install the steering unit

When installing the steering unit, it must ensure concentric with the connecting

shaft, axial clearance can avoid propping by valve core, checking the hand wheel if it

can return to the neutral position flexibly after installing.

The allowable flow rate of the inlet oil pipe is 1-1.5m/s, the allowable flow rate of

the outlet oil pipe is 4-5m/s. The experimental pressure of the high pressure tube must

high than 1.5 times as much as the maximum working pressure.

For the safety and convenient repair, it is suggested that a connector should be

installed at the inlet port of the steering unit for a pressure gauge.

(2) Oil temperature range:-20℃~+80℃

Normal oil temperature:+30℃~+60℃

(3) Choose oil: N46 or N32 hydraulic oil

(4) Filter oil: The accuracy of oil inputted into the steering unit is 30 micron.

0.2-0.3MPa Back pressure of outlet oil of the steering unit can prevent the oil from

flowing into the oil for the manpower turning.

① Cleaning pipes of the system and closed oil tank can reduce the oil pollution.

② Trial run: Clean the oil tank and add oil to the top level before trial run. Loose

the bolt connector of the steering cylinder and bleed air at the low speed of the oil

pump.

Disassemble the piston rod and steering wheel, turn the hand wheel, make the

piston at the limit left or right position, then add oil into the oil tank to the top level.

Tighten all bolt connectors and connect the piston rod, check the steering

system for the good condition. If the hand wheel can’t be operated flexibly, it’s

necessary to find possible cause and remedy it.

Check the system pressure when the piston of the steering cylinder reaches the

limit position.

③ Maintenance: Check the condition of the leakage, oil level of the oil tank

everyday. Regularly replace the oil filter and oil. During operation abnormal condition

is found, it’s necessary to find possible cause and remedy it. Don’t turn the hand

wheel by two men at the same time.

5.3.4 Check and maintenance of the steering unit