Derek
Yes this could have serious consequences but only by way of negligence if you have changed the specification of the machine from the manufactures, the manufacturer is normally responsible, for example, if the machine blows up and kills or seriously injures someone due to manufacturing faults which they will be covered by insurance, this is why if you try to insure a car the insurance company will ask you if you have altered or modyfied the vehicle in any way, they will then charge a higher premium to cover for this.
Should you wish to change a machine in any way just ring the manufacturer and ask for their oppinion and for their agreement to change spec and get written confirmation if possible, this should not only be done with new machines but with old machines as well, this way you are fully covered.
It should be noted that a manufacturers warrenty of 1 year does not stand up much in court theese days, as the sale of goods act now says that a purchase should be expected to last a reasonable amount of time and due to the high cost of cc machines this would cover our industry also, barring the obvious consumable items, i.e pumps, seals, valves ect, however to be able to cover your self in any case full sericing should be carried out on all pieces of equipment at regular intervals and all records of service should be kept on file.
regards Dave ADL