Simpson MINI BRUTE MBII Operator's Manual page 14

Problem
The pressure is low.
The water temperature is too low.
.
There is smoke coming from the
machine
Page 14
Cause
There is a leak in the pump.
The nozzle is worn.
The water supply is too low.
The check valves in the pump are worn or
dirty.
The plunger packing is worn.
The nozzle is the wrong size.
The fuel filter is dirty.
The coils are limed or sooted.
There is water in the fuel.
The fuel pressure is low.
The fuel pump pressure is weak.
Dirty fuel nozzle.
The wrong type of fuel is being used.
There is not enough air to the burner.
The fuel nozzle components are loose.
The coils are sooted.
Action
Contact Customer Service.
Install a new nozzle.
Increase the water supply. Make sure the
garden hose is 3/4" I.D or larger.
Contact Customer Service.
Contact Customer Service.
Use only the nozzle recommended for the
machine.
Replace the fuel filter.
Delime or desoot the coils.
Drain and replace the fuel.
Contact Customer Service.
Contact Customer Service.
Contact Customer Service.
Use only #1 or #2 diesel or kerosene.
Contact Customer Service.
Contact Customer Service.
Clean the soot from the outside of the coils.
Mini-Brute II Owner's Manual