Draining Fluids-Union Fluid Drain; Adding Coolant - Generac Mobile MFH900 Owner's Manual

Maintenance
Draining Fluids—Union Fluid Drain
See Figure 4-1. This unit is equipped with a union fluid
drain (A), an exterior drain port for multiple fluids—
engine oil, engine fuel, engine coolant, hydraulic oil, and
DEF.
A
D
Figure 4-1.
Several ball valves (B, C, D) control fluid flows to exterior
drain.
A Union fluid drain (exterior drain port)
B Ball valve—engine oil
C Ball valve—hydraulic oil
D Three ball valves—DEF, coolant, and fuel—see hole
in floor
26
C
B
To drain a fluid:
IMPORTANT NOTE: Drain one fluid at a time.
WARNING
Risk of burns. Allow engine to cool before
draining oil or coolant. Failure to do so could
result in death or serious injury.
WARNING
Potential of cancer. Prolonged or repeated contact
with used motor oil has been shown to cause cancer
in laboratory animals. Thoroughly wash exposed
areas with soap and water.
1. Verify unit is off and interior components are cool.
2. Verify all ball valves are OFF.
3. Place suitable container under exterior drain.
4. Remove plug from exterior drain port.
5. Open a ball valve.
IMPORTANT NOTE: Drain one fluid at a time—do not
open more than one ball valve.
6. Allow fluid to drain.
7. When fluid stops flowing from exterior drain, install
exterior drain plug removed in step 4.
8. On the controller, reset he service interval.
See Accessing
Service Intervals

Adding Coolant

DANGER
Risk of poisoning. Do not use mouth to siphon
coolant. Doing so will result in death or serious
injury.
WARNING
Risk of burns. Do not open coolant system
until engine has completely cooled. Doing so
could result in serious injury.
CAUTION
Risk of overheating. Do not use any chromate base
rust inhibitor with propylene glycol base antifreeze,
boosters, or additives. Doing so will cause overheating
and possible equipment damage.
If coolant level is below the filler neck, coolant needs to
be added (see Coolant Recommendation).
1. Verify engine is stopped and cooled.
Owner's Manual for Flameless Air Heater
(000139)
(000127a)
and Resetting Controller
for more information.
(000149)
(000154)
(000165a)