2019 21 D4OPTRS
POWER UNIT
FUNCTION
The Power Unit drives the blower and hydraulic pump and is, therefore, the source of energy
for the sweeping operation. All standard controls and gauges for the Power Unit are located
inside the truck cab for operator convenience. The V2403-CR-TE4B Final Tier 4 engine is
an electronic engine and requires an engine control module (ECU). The ECU communicates
with the BlueLogic control system over the CAN datalink. See BlueLogic Control System
section of this manual for details. The ECU and BlueLogic control system monitor and control
the engine throttle. The engine will start and run at 1100 RPM. The engine speed is variable,
in 25 RPM increments, up to the maximum high idle speed of 2100 RPM. The maximum
high idle speed can be adjusted up to 2200 RPM for heavy duty applications or down to
1600 RPM for economy sweeping. See the Control System Section for details. Note that
operation of the sweeper in excess of the factory maximum speed setting (2100 RPM) will
affect optimum component life, noise, and fuel economy. Refer to the applicable Power Unit
Operator’s Manual for detailed information.
Note: All Power Unit parts must be purchased through the engine manufacturer
dealer network.
ENGINE PROTECTION
The ECM monitors and protects the engine and communicates all engine data through the
CAN datalink to the HMI display module on the control panel. The HMI display module displays
the engine speed, engine load at current engine speed, coolant temperature, oil pressure,
engine hours, system voltage, etc. as well as Kubota fault codes. If the ECM detects an
engine fault it will:
1. Send an engine fault code message to the HMI display
2. Automatically derate and/or shutdown the engine after a specifi ed time to protect the
engine from damage.
The display will notify the operator of the fault via a visual message and an audible alarm. The
operator can check the display for any active fault codes, but will need to take the sweeper
to an authorized Kubota industrial engine service provider for diagnosing any engine fault
codes that become active or that have previously occurred.
DIESEL FUEL REQUIREMENTS
Diesel fuel must meet certain requirements for lubricity, cetane, sulfur content, and cold fi lter
plugging point to ensure proper operation and prevent damage to the engine, fuel system
and exhaust system.
• Cetane number: 43 minimum, 47 preferred
• Fuel lubricity: See Kubota manual
• Sulfur Content: Use only ultra low sulfur diesel fuel (15 ppm max)
• Bio diesel 7% (B7) maximum
ENGINE COOLANT REQUIREMENTS
TYMCO recommends the use of ethylene glycol based extended life coolant/antifreeze that
meets ASTM D6210 and contains a nitrite free additive package. It should be a 50/50 dilution
with quality water. A proper coolant mixture has been used upon the initial fi lling of the system
during manufacture. The coolant has a 12,000 hour, 6 year service life. If needed, top off with
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