Breakdown Information
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2001 National Caribbean 35' DP - Allison Transmission
260 HP Cummins ISB
Overheated about 100 miles into trip.
Made it to a Cummins Repair Shop
This was our first trip in the used DP we purchased in December.
Cummins shop found charge air cooler was shot and filter was clogged.
Asked shop to replace CAC and filter, change coolant, change thermostat and clean and flush radiator.
When degreasing radiator, fins started to fall out. Radiator was corroded from road salt (purchased from individual in Chicago area).
Radiator had to be replaced.
RV nows run beautifully.
Do not rely on CAC air gauge, which is supposed to show when airflow is becoming restricted. Our gauge, which I checked regularly, showed all was normal. My CAC was so clogged, I'm surprised the RV would even start. Cummins tech told me they see this all the time, RV'ers rely on the gauge without checking the filter in the CAC and they've seen cylinders scorched because of dirty air reaching the cylinders.
260 HP Cummins ISB
Overheated about 100 miles into trip.
Made it to a Cummins Repair Shop
This was our first trip in the used DP we purchased in December.
Cummins shop found charge air cooler was shot and filter was clogged.
Asked shop to replace CAC and filter, change coolant, change thermostat and clean and flush radiator.
When degreasing radiator, fins started to fall out. Radiator was corroded from road salt (purchased from individual in Chicago area).
Radiator had to be replaced.
RV nows run beautifully.
Do not rely on CAC air gauge, which is supposed to show when airflow is becoming restricted. Our gauge, which I checked regularly, showed all was normal. My CAC was so clogged, I'm surprised the RV would even start. Cummins tech told me they see this all the time, RV'ers rely on the gauge without checking the filter in the CAC and they've seen cylinders scorched because of dirty air reaching the cylinders.
