95
9.4.7 Control
Fig. 31
The regulation is designed as continuous
speed control consisting of:
* The intake control valve,
* The engine control cylinder,
* The regulator itself.
The intake control valve comprises:
* the control piston for the volume flow-
rate throttle control and acts as a check
valve preventing flooding of the suction
control valve and the air filter with oil
when the screw compressor is switched
off.
9.4.8 Battery maintenance
Fig. 32
Danger
The gases released by the battery are
explosive.
Avoid sparks and open fires in the
vicinity of the battery.
Do not allow acids to come into contact
with skin or clothing. Wear safety
goggles.
Place no tools on the battery.
The battery is maintenance-free in
accordance with DIN.
9. Maintenance
Attention
Check the acid level after a maximum
of 1,000 operating hours, or after
24 months, whichever occurs first, and
fill up with distilled water if necessary.
For battery maintenance please also refer
to the manufacturer’s instructions and the
engine operating manual.
9.4.9 Torque specifications
The following torque specifications apply to
the screw connections:
Wheel screws 90 Nm
Pressure vessel cover 40 Nm
Safety valve 50 Nm
Engine bearing/
rubber metal element 90 Nm
Compressor bearing/
rubber metal element 90 Nm
Chassis mounting screw 90 Nm
suspension / frame
property class 12.9 (Durlok screw) 169 Nm
property class 8.8 90 Nm
suspension cross girder 90 Nm
hose clip
(engine, compressor/cooler) max. 12 Nm
hose clip (compressor/
pressure container) max. 30 Nm
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