Find the correct method first
Use the machine instructions to establish what can be cleaned, by which method and under what conditions. Ask the supplier where instructions are unclear. Do not assume that a pressure washer, detergent or compressed air is appropriate simply because it is already available.
Keep cleaning separate from maintenance you are not competent to perform. Removing a guard or accessing a difficult area can change the hazards of the task.
Plan the safe state of the machine
Arrange cleaning in accordance with the manufacturer's isolation and safe-working procedure. HSE's safe-maintenance guidance explains the importance of stopped movement and controlled stored energy.
This guide is not an isolation procedure. If you cannot establish a suitable method for the actual machine, obtain competent help rather than improvising around hot, raised or moving parts.
Consider the cleaning location
Ask where dirt, residues and any wash water will go. Identify the materials involved before selecting a disposal route. Requirements depend on the activity, contamination and location; seek the appropriate environmental advice rather than letting residues reach a drain by default.
Include access, electrical arrangements and the effect on other users in the plan. Refer electrical questions to a competent person. HSE's agriculture electricity guidance provides background.
Leave time at the end
Schedule cleaning and putting equipment away as part of the job, not an optional task after all daylight or hire time has been used. Have the approved tools and materials available before work begins.
Record defects noticed during cleaning and follow the appropriate process for taking equipment out of use. Clean appearance is not proof that a machine is ready to operate.
Make the next job easier
After cleaning, follow the maker's instructions for storage and any further checks. Update the machine record with unresolved issues. A useful cleaning plan connects the correct method, a suitable location and an agreed route for residues; it does not simply specify a more powerful washer.