Variable reluctance pressure transducers may be disassembled and the range changed by installing a new sensing diaphragm. When changing diaphragms, the correct body bolt torque is extremely important to performance.
The sequence for torquing the body bolts is just like putting the wheel on a car. Try to apply the torque in stages. Do not torque one bolt fully while the others are still loose.
Here is a listing of the bolt part numbers and correct body bolt torque settings, by transducer model number:
Here are the tools needed: