MAC/MTT-OPS-1
26 FEB 2019
SECTION 4
Normal Operations
4-8
COLD WEATHER OPERATIONS AND
STORAGE
Ensure all water is drained from system when the
temperatures are expected to fall below 4.4°C
(40°F) for any period of time. Failure to ensure all
systems are drained and free from standing water
will result in ice formation, which will cause serious
damage to shaft, operator, diaphragm, drive
motor, water pump, or butterfly valve.
To ensure all water is drained from tank check the
following:
1. Park unit on a slight nose up angle to allow
water to flow to the rear of the tank.
2. Drain the tank using an appropriate method
until the Water Level Gauge reads EMPTY.
3. Open all drain petcocks (water pump, suction
load pump, rear spray bar, front spray bar, etc.).
4. Remove water pump sump cover.
5. Start engine.
6. Cab Control SYSTEM/POWER Switch – ON
7. MONITOR/BFV Switch – ON
8. DUMP BAR Switch – ON
9. DRAIN Switch – ON
10. Water Cannon Nozzle – Pointed fully DOWN
11. Cab Control SYSTEM/POWER Switch – OFF
12. Turn engine off.
13. Hose Reel – DRAIN
a. Hose – UNWIND
b. Nozzle – Fully OPEN
c. Gate Valve – OPEN
d. Allow water to drain.
e. Hose – REWIND
f. Gate Valve – CLOSED
g. NOZZLE – CLOSED
14. Check to ensure all water has drained from
tank.
Unit Reactivation
1. Lubricate water pump bearings as instructed
in -2 technical manual.
2. Inspect tank interior to ensure it is clean, if the
tank is coated, ensure coating integrity, clean
or repair as required.
3. Install sump cover with new gasket.
4. Close all drain valves and petcocks.
5. Start engine.
6. Control SYSTEM/POWER Switch – ON
7. Individual Spray Head Switches – OFF
8. DUMP BAR Switch – OFF
9. DRAIN Switch – OFF
10. MONITOR/BFV Switch – OFF
11. Cab Control SYSTEM/POWER Switch – OFF
12. Turn engine off.
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