Truck APU maintenance needs its own record. An oil change on the truck’s main engine does not automatically count as an APU service, and truck mileage does not describe every hour the unit worked during rest periods. This guide helps you gather information for service planning and a useful conversation with the shop.
Manufacturer reference photograph of Go Green APU™. It shows equipment for context, not evidence of maintenance performed for a customer by The Truck Savers™.
Start by identifying the equipment
Keep a readable photograph of the APU identification and record its model, serial number and engine. Retain the manual for that configuration, service history and installation documents. If you bought the truck with the APU already installed, request the available history before assuming when it was last serviced.
Separate APU hours from truck engine hours
Record the date and the APU hour-meter reading from the relevant controller or record. Identify which counter you are using. If the controller was replaced or the accumulated reading is uncertain, explain that history to the shop rather than approximate a complete maintenance history.
Use a simple record: date; APU hours; work performed; specified fluid or part shown on the work order; observations; next service indicated. Attach the invoice or report. Keeping the information together helps separate what is documented from what still needs checking.
Confirm the model’s schedule before setting an interval
Ask the technician which manual and schedule apply to your unit. The Kubota/Globus manual published by Go Green APU™ distinguishes initial service from recurring oil changes. Review the complete model-specific schedule rather than one advertised hour figure.
For the next appointment, confirm which tasks are due by hours, elapsed time and operating conditions under that schedule. Ask about oil, filters, belts, cooling and electrical checks where applicable. Recording one completed task does not mean every other task was included. Do not copy oil grades, capacities or part numbers from a different APU.
Describe operating changes with useful details
If you notice weaker cooling, shutdowns, a different noise or an alarm message, record when it happened, what the controller displayed and which appliances were running. A screen photograph may help. These details support inspection; they do not establish that refrigerant is low, that a part needs replacement or that the APU can keep operating.
Do not clear a message or repeatedly restart the unit to try to hide an alarm. Follow the equipment instructions and seek guidance before operating again when the manual requires it. Stop using the unit and obtain assistance if there is smoke, a fuel smell or an obvious leak. Do not reach into components that could start or open a hot system for a photograph.
What to send when requesting a service appointment
Share the city, truck make and model, APU identification, hour reading, last documented service date and reason for the request. Include the exact screen message and available reports. Say when information is unknown. “I have no record of the previous service” is more useful than an invented date.
The shop should review the scope for that make and model before confirming an appointment and work. Asking about a different APU brand does not mean every service or part is available. Confirm the location, conditions, authorization and expected timing before moving the truck.
What to keep after service
Request a work order identifying the unit and hours, completed work and outstanding recommendations. Retain the part details and specifications on the report; do not interpret an inspection as component replacement. If there was a symptom, ask what was found and what remains unverified. Separately record the agreed next service date and hours.
For an explanation of what an APU does and how it relates to cab electrical loads, read our guide: https://thetrucksavers.com/en/blog/go-green-apu-diesel-savings . If you are planning an installation, first gather the truck details and available-space information.
Reference consulted: the Go Green APU™ Kubota/Globus owner’s manual, available through the manufacturer’s manuals page. Confirm the version applicable to your unit’s serial number: https://gogreenapu.com/apu-manuals/
Truck APU Installation: What to Prepare Before a Quote: https://thetrucksavers.com/en/blog/truck-apu-installation-quote-checklist
Ask about the service scope for your Go Green APU™ with The Truck Savers™ in Houston: https://thetrucksavers.com/en/houston/go-green-apu and Dallas: https://thetrucksavers.com/en/dallas/go-green-apu . For local sales and installation, you can also contact APU’s of Houston: https://apusofhouston.com/ or APU’s of Dallas: https://apusofdallas.com/
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