Proheat X45–School Bus - Manual (Page 98)

CHECK EXHAUST SYSTEM
• Make sure the exhaust pipe
is vented safely away from
the vehicle cab.
• Check the pipe for dents,
restrictions or severely
corroded areas.
• Replace the exhaust pipe
and clamps if necessary.
• Ensure the exhaust pipe
clamp is tight.
• Clean exhaust pipe if there is
a significant accumulation
of carbon build up.
Figure 6-3 Exhaust Pipe
CHECK HEAT EXCHANGER
• To maintain optimum heat output, clean any combustion deposits that may
have accumulated on the heat exchanger fins.
• Remove the fan end assembly and combustion tube to access the inside of
the heat exchanger.
• Ensure exhaust pipe is clean and free from restriction.
• Use a wire brush to loosen the deposits and a vacuum to suck them out.
• Torque securing screws to 25±3 in/lbs (2.8±0.3 Nm).
Figure 6-4 Heat Exchanger
COMBUSTION TUBE
HEAT EXCHANGER FINS
SECURING
SCREWS
EXHAUST PIPE
6-3 SECTION 6. MAINTENANCE
6.2.3
6.2.2