Thermo King UT-1200, Manual

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Maintenance Inspection Schedule
Pretrip 750
Hours
Annual
2,000
Hours
Inspect/Service These Items
Microprocessor
• Run pretrip test (see “Pretrip Test” in Operating Instructions Chapter).
TK 376U Engine
• Check fuel supply.
• Check engine oil level.
• • • Check engine coolant level.
(CAUTION: Do not remove radiator cap while coolant is hot.)
• • • Inspect belts for condition and proper tension.
• • • Check engine oil pressure hot, on high speed.
• • • Listen for unusual noises, vibrations, etc.
• • Change engine oil (hot). (1000 hrs with bypass filter or synthetic oil).
• • Change oil filters.
• • Clean and service crankcase breather.
• • Drain water from fuel tank and check vent.
• • Replace fuel filter
• • Replace dry type air cleaner element.
• • Inspect/clean electric fuel pump filter.
• • Check air cleaner hose for damage.
• Check and adjust engine speeds.
• Check condition of engine mounts.
• Check restraining mount (snubber) pre-load adjustment.
• Maintain year round antifreeze protection at –30 F (–34 C).
— Clean and test fuel injection nozzles every 3,000 hours.
— Replace fuel return lines between fuel injection nozzles every 10,000 hours or
sooner, as required.
— Change ELC (red) engine coolant every 5 years or 12,000 hours.
Refrigeration
• • • Check refrigerant level and compressor oil condition.
• • • Check for proper suction pressure.
• Check throttling valve regulating pressure on defrost.
• Check compressor oil level.
• Check compressor efficiency and pump down refrigeration system.
• Replace dehydrator and check discharge and suction pressure.
*Replace compressor oil filter when refrigeration system work is performed.