SAFARI

POWER STEERING

process. Due to the various types of

installation possibilities of our hydraulic

steering systems (inverted, vertical, horizontal

etc.) it can occur under certain circumstances

that for a short period of time, the steering

system cannot be bled in certain types of

vehicle and the air in the steering gearbox is

only removed very slowly. In such a case, we

recommend that the steering drop arm should

be removed so that the entire piston stroke

from stop to stop can be utilized in the steering

housing for the bleeding process.

In this way the air remaining in the cylinder is

reduced to a minimum.This is an insignificant

amount which is automatically absorbed by

the oil and separated during operation.

The steering system and pump should be filled

through the opening on the oil reservoir. For the

first filling and for oil changes it is recommended

to remove the cover of the container and fill with

hydraulic oil up to the edge of the container.

The engine should then be cranked briefly a

number of times with the starter in order to fill the

entire hydraulic systemwith oil. Since this causes

the oil level in the container to fall rapidly, the oil

must be continually topped up during this process

and under all circumstances the pump must be

prevented from taking in air.

3.2 Bleeding :

The engine can be started with the steering axle

jacked up when the steering system is filled with

oil so that the oil level no longer falls below the

upper marking on the oil dipstick when the engine

is briefly turned over.

Allow the engine to run for some time at low speed,

thus allowing most of the air to escape from the

cylinder. The oil level must be observed during

this process. The oil must be topped up

immediately if the level still sinks.

When the above instructions have been observed

the oil level in the oil container must not rise higher

than approximately 1 to 2 cm when the engine is

switched off, according to the size of the steering

system

Steering gear MO33 is with automatic bleeding

and do not have a bleeding screw. The steering

system automatically bleeds the remaining air in

II. Oil filling and air bleeding

Note :

There is a danger that dirt particles may enter

the steering oil circuit when filling the steering

unit with hydraulic oil. A high degree of

cleanliness must be observed for the first filling

and for all subsequent topping up operations

in order to prevent failure due to foreign bodies

in the system. For this reason, thoroughly clean

the oil reservoir and the area around it before

removing the oil reservoir cover or dip- stick so

that dirt does not get into the hydraulic oil.

1. Type of oil :

A suitable hydraulic oil must be used in order to

ensure perfect function of the steering unit and

the pump. The hydraulic oil also carries out the

lubrication of the steering gearbox and the pump;

therefore only one type of oil is necessary for the

entire unit.

The unit should be filled with ATF oils with a

viscosity of approximately 26 mm

/s (cst) at 50

C, a setting point below-35

C and with low

inclination to foam formation. Oils with a high

viscosity may lead to the situation that the under

pressure in the inlet line becomes too great thus

causing noises in the pump. (Approx. 2 ltrs.)

2. Oil quantity :

The hydraulic steering system is delivered from

the factory without being filled with oil. The oil

required for the complete system depends on

the length of pipes used in the system.

Type M033 0.3 Lts

3. Oil filling and air bleeding

3.1 Oil filling

Note :

Special care must be taken during the

procedure described as follows to ensure that

the oil reservoir is not allowed to run empty

since this would cause air bubbles in the

steering system. In addition to this, special

care must also be taken during oil filling and

air bleeding to ensure that the pump only turns

at the lowest possible speed (idling). If the

inlet flow is too great small air bubbles would

enter the pump and be split up into extremely

small air bubbles during its passage through

the pump; this situation may lead to foam

formation thus greatly extending the bleeding