Webasto Thermo Top Z Heater Service Manual

A Webasto Thermo Top Z is an auxiliary heater that warms the cab or the coolant circuit on cranes and heavy vehicles, so the operator gets heat and the engine starts easier on cold mornings. When one stops firing, throws a fault or needs to come out of the vehicle, the technician reaches for the repair shop manual. This is the book for pulling the heater apart, checking it and putting it back together. The manual also covers the Thermo 50, Thermo Top C and Thermo Top E.

What this manual helps you do

• Diagnose a no-start or lockout using the fault symptoms and error messages sections.
• Check heater function step by step with the functional checkouts.
• Follow the heater disassembly procedure and the repair section when a component has to be replaced.
• Verify the electrical connections, including the control unit connector pin assignment and the 12 V switching circuits for the Thermo Top Z.
• Replace the timer or the circulation pump (Thermo Top E and C), and set the installation positions for the dosing pump, air intake muffler and exhaust pipe outlet.

Who this is for

You're a crane service technician, a rental fleet mechanic or an independent repair shop doing heater work in-house. It also suits a dealer technician who needs the technical data and servicing steps on the bench. If the machine came in with no paperwork, this gives you something to work from.

FAQ

Q: What do I receive and how is it organised?

A: One PDF file, 46 pages, in English, publication number 63378C_EN. The text can be searched and copied, and it runs from introduction, general and functional description through technical data, troubleshooting, servicing and repair.

Q: Which heater does it fit?

A: It is written for the Thermo Top Z. The same manual also covers the Thermo 50, Thermo Top C and Thermo Top E, and the title reads Thermo Top Repair Shop Manual.

Q: How does it fit the job I'm doing?

A: It's the complete manual for this heater. You get the fuel supply, the Webasto fuel tap, the inline integration in the engine water cooling circuit and the installation example, so you can work through a fault from symptom to repair.

Download it, open the troubleshooting section and start tracing the fault before you take anything off the vehicle.

Click here to view the preview (PDF)

Models covered by this manual

This service manual is also used for 3 further Heater models: Thermo 50, Thermo Top C, Thermo Top E. Check the model and serial number on your data plate before ordering.

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