84
Maintenance and Service
The tightening torque for the
wheel nuts (Fig. 36/1) is 140
Nm.
Changing the rear wheels
• To change the rear wheels, the Ha-
komatic B 1050 W must be jacked
up on the right or left side.
• The contact points for the jack (lifting
force: 2.0 t) are on the vehicle frame
in front of the rear wheels.
Removing the rear wheels
• Remove the wheel nuts (Fig. 36/1).
• Remove the wheel.
Mounting the rear wheels
• Install the wheel in place.
• Screw on and tighten the wheel nuts
(Fig. 36/1).
5.10
Electrical installation
5.10.1 Red control lamps
Refer to Section 3.2.2.
5.10.2 Error codes
Refer to Sections 3.5.1 and 3.2.2.
5.10.3 Fuses
The fuses are located in the electronic
system underneath the seat console.
Take hold of the seat console by the
handle and pivot it up.
Always disconnect the battery
plug before starting any work
on the electrical installations.
All the lifting elements and brush mo-
tors in the Hakomatic B 1050 W are
equipped with safety fuses and electro-
nic fuses.
Safety fuses are installed in:
• the suction turbines
(35A high current fuse)
• the water pump and relief valve for
the water supply
(10A plug-in fuse)
• the hydraulic motor (160A current li-
miter in the drive control) and
• the working lights and flashing bea-
con, the key switch and horn (10 A
plug-in fuse (F51)).
When these fuses blow, the
vehicle is out of operation. This
is not indicated by an alarm si-
gnal on the operating panel!
5.10.4 Drive control relay
The drive control is located in the left-
hand part of the driver's cab underneath
the foot plate.
Always disconnect the battery
plug before starting any work
on the electrical installations.
• Loosen the screws in the foot plate
and remove the foot plate.
• Relay K3 (main contactor) is moun-
ted in front of the drive control.
• Replace a defect relay with a new
one.
• Replace the foot plate and fix by
means of the screws.
