MAYCO LS300G CONCRETE PUMP • OPERATION MANUAL — REV. #2 (09/09/19) — PAGE 43
MAINTENANCE
RADIATOR/COOLING SYSTEM
Coolant (Antifreeze/Summer Coolant/Water)
ZENITH
recommends antifreeze/summer coolant for use in
their engines, which can be purchased in concentrate (and
mixed with 50% demineralized water) or pre-diluted. See the
ZENITH Engine Owner’s Manual
for further details.
Day-to-day addition of coolant is done via the radiator
coolant bottle. When adding coolant to the radiator,
DO NOT
remove the radiator cap until the unit has completely cooled.
Coolant capacity with radiator is 3.6 quarts (3.8 liters).
Operation in Freezing Weather
When operating in freezing weather, be certain the proper
amount of antifreeze Table 7 has been added.
Draining Engine Coolant
1. Remove the radiator pressure cap (Figure 43) only if
the coolant temperature is below 120°F (50°C).
WARNING
If adding coolant/antifreeze mix to the
radiator,
DO NOT
remove the radiator cap
until the unit has completely cooled. The
possibility of
hot!
coolant exists which can
cause severe burns.
Table 7. Anti-Freeze Operating Temperatures
Vol %
Anti-
Freeze
Freezing Point
Boiling Point
°C
°F
°C
°F
50
–37
–34
108
226
WARNING
NEVER
remove the pressure cap from the radiator when
the engine is hot! Wait until the coolant temperature is
below 120°F (50°C) before removing pressure cap.
Heated coolant spray or steam can cause severe
scalding and personal injury.
Figure 43. Radiator Pressure Cap Removal
2. Open the coolant drain valve (petcock), then allow the
coolant to drain into a suitable container (Figure 44).
Figure 44. Draining Radiator Coolant
3. Remove and inspect radiator cap seal. Replace cap
if seal is worn.
4. Tighten coolant drain valve (petcock).
5. Fill radiator and coolant reserve tank (Figure 45) with
recommended coolant as listed in Table 7. Fill reserve
tank to approximately 1 inch below the top of the tank.
Figure 45. Coolant Reserve Tank
°F
WATER TEMP
100
140
180
220
260
°F
WATER TEMP
100
140
180
220
260
CORRECT
PRESSURE
CAP
COOLANT
DRAIN VALVE
(PETCOCK)
COOLANT
ANTI-FREEZE
FILL 1-INCH
FROM TOP
TOP
COOLANT
RESERVE TANK
Summary of Contents for MAYCO LS300G
Page 2: ...PAGE 2 MAYCO LS300G CONCRETE PUMP OPERATION MANUAL REV 2 09 09 19 PROPOSITION 65 WARNING...
Page 5: ...MAYCO LS300G CONCRETE PUMP OPERATION MANUAL REV 2 09 09 19 PAGE 5 NOTES...
Page 73: ...MAYCO LS300G CONCRETE PUMP OPERATION MANUAL REV 2 09 09 19 PAGE 73 NOTES...
Page 85: ...MAYCO LS300G CONCRETE PUMP OPERATION MANUAL REV 2 09 09 19 PAGE 85 HYDRAULIC SYSTEM DIAGRAM...
