Operating instructions
Steering 67
Steering
The steering system is a self-compensating, hydro-mechanical
system and is provided with a secondary steering function via a
ground-dependent pump positioned on the dropbox. This ensures
steering down to approx. 3 km/h, even if the engine should stop.
During all forward operation, the control lamp (red) for engine-
dependent pumps and the control lamp (amber) for ground-
dependent pump (secondary steering) should be extinguished.
If the red lamp (A) for the engine-dependent pumps is on:
The hydraulic pumps have stopped functioning (e.g. the engine
has stopped). The steering will work down to approx. 3 km/h. The
steering pressure is obtained from the ground-dependent pump
when operating forward.
If the amber lamp (B) for the ground-dependent pump is
alight:
The hydraulic pump has stopped functioning. The steering
functions normally, but if the engine-dependent pumps should now
stop functioning, the steering of the machine will be made
completely inoperable.
If any of the lamps are alight, stop the machine immediately
and contact a workshop authorised by Volvo CE.
Secondary steering
The machine features a secondary steering system which is drive
wheel-dependent (ground-dependent pump). This means that the
secondary steering works down to approx. 3 km/h when operating
forward.
Testing the secondary steering system
Test the secondary steering system every 2000 hours.
Run the machine on a road where there is no other traffic, stop the
engine by pressing in the emergency stop when the machine is
moving at approx. 10 km/h. The steering should function down to
a speed of approx. 3 km/h.
NOTE! The pressure in the brake system should be at
maximum level before testing.
A Control lamp (red) engine-dependent
pump (primary steering system)
B Control lamp (amber) ground-
dependent pump (secondary steering
system)
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