Section 4 - Operations
46 SCHWARZE HYPERVAC HV-18 revised 11/18
Sweeper Unit Gauges
1. AUX ENGINE TACHOMETER
2. HYDRAULIC TEMP GAGE
3. AUX ENGINE COOLANT TEMP
4. ENGINE ICON
5. LOAD WEIGHT INDICATOR
6. AUX ENGINE OIL PRESSURE
7. FRONT WATER TANK LEVEL (RED ICON SHOWS
LOW WATER SWITCH IS ACTIVE)
8. REAR WATER TANK LEVEL
9. WATER TANK GAUGES
10. AUX ENGINE DEF LEVEL
a. DEF LEVEL GAUGE
Engine Oil Pressure (key 5)
Normal engine oil pressure should be 380 ± 103kPa (3.80
bar ± 1.03 bar; 55 ± 15 psi) at rated full-load speed (1800
- 2500 rpm) with oil at normal operating temperature of
105°C (220°F).
Important: If the gauge needle does not rise above the
minimum oil-pressure specication of 103 kPa (1.03 bar;
15 psi) within 5 seconds, stop the engine and notify your
supervisor.
Coolant Temperature Gauge (key 3)
Normal engine coolant temperature range is 82° - 94°C
(180°-202°F).
Important: Do not place the engine under full load until it
is properly warmed up.
Warming The Engine
Important: To assure proper lubrication, warm the engine
by operating it at 1200 rpm with no load for 1 to 2 minutes.
When operating at temperatures below freezing, extend
this period to 2 to 4 minutes.
Idling The Auxiliary Engine
Important: Avoid unnecessary engine idling and never
allow the engine to idle longer than 5 minutes. Prolonged
idling could cause crankcase oil dilution, formation of
gummy deposits, engine sludge and unburned fuel in the
exhaust system.
Slow idle for this engine is set at 850 rpm at the factory.
If you must leave the engine running more than 3 to 4
minutes, make sure the engine speed is at 1200 rpm.
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