PAGE 44 — MAYCO LS450 CONCRETE PUMP • OPERATION MANUAL — REV. #2 (02/23/21)
MAINTENANCE
Operation in Freezing Weather
When operating in freezing weather, be certain the proper
amount of antifreeze has been added. See Table 7.
Radiator Maintenance
1. Check the radiator for leaks that would indicate
corrosion or damage.
2. Check the coolant level daily. Top off as necessary.
Always use recommended coolant/antifreeze.
Use the mixing ratios specified in Table 7 or by
the coolant/antifreeze manufacturer. Replace
coolant/antifreeze at least once a year.
3. Check radiator hoses for fatigue or cracking. Replace
any defective hoses immediately.
4. Check the radiator cap seal and replace as necessary.
5. Blow off dirt and dust from the radiator and cooling
fins with 28 psi (193 kPa) or less of compressed air
(Figure 48). Be careful to not damage the fins with the
compressed air.
Figure 48. Radiator Cleaning
Table 7. Antifreeze Operating Temperatures
Vol %
Anti-
freeze
Freezing Point Boiling Point
°C °F °C °F
50 –37 –34 108 226
COOLING
FINS
COMPRESSED AIR
OR
PRESSURE WASHER
CAP
6. If there is a large amount of contamination on the
fins, clean with detergent and rinse thoroughly with
tap water.
FUEL PREFILTER
Replace the in-line fuel filter every 500 hours or 2 years.
1. Block the fuel feed line with a hose clip (Figure 49)
between the fuel tank and fuel prefilter.
Figure 49. Fuel Prefilter
2. Place a suitable container under the filter to collect
emerging fuel.
3. Disconnect the water level sensor cable (Figure 49)
from the drain plug.
4. Release the drain screw and drain the fuel.
5. Unscrew the fuel prefilter. Fully unscrew the drain plug
with integrated water level sensor.
6. Dispose of the used fuel prefilter according to local
environmental regulations.
7. Clean the drain plug with integrated water level sensor
and lightly oil the sealing surfaces. Screw the drain plug
into the new fuel prefilter.
8. Lightly oil the gasket of the new fuel prefilter. Install the
filter and tighten it by hand.
9. Release the fuel feed line and connect the water level
sensor cable.
NOTICE
NEVER use high-pressure water or compressed air at
greater than 28 psi (193 kPa), or a wire brush to clean
the radiator fins. Radiator fins damage easily.
DRAIN PLUG
HOSE CLIP
WATER LEVEL
SENSOR CABLE
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