Troubleshooting, Servicing And Product Warranty - Mitsubishi Electric JR Series Instruction Manual

b. Installation of an open type ball bearing or roller bearing
(a) Place the bearing for 30 minutes in clean oil heated to 90°C. Never let the oil temperature
exceed 100°C. Fit the heated bearing onto the shaft, and do not move it until it cools down.
When mounting onto the shaft, always wear protective equipment to prevent burns, etc.
(Assemble the housing cover, etc., before inserting the bearings.)
(b) Prying may occur if the lock nut is tightened or the bracket assembled before the bearing cools
down.

16. TROUBLESHOOTING, SERVICING AND PRODUCT WARRANTY

(1) Commission all repairs, disassembly and modification to a specialist.
Modifications of the product by the user will not be covered by the Mitsubishi warranty.
(2) Common troubles and remedies are described in Table 16.
If the problem cannot be solved easily, or if there are any unclear points, consult Mitsubishi sales
Office or local agent.
Note the following items when making inquiries on troubles or when purchasing spare parts.
(a) The type (TYPE), output (kW), No. of poles (POLE), frame No. (FRAME), manufacturing No.
(SERIAL) and manufacturing date (DATE) listed on the motor nameplate.
(b) Length of use.
(c) Usage site.
(d) Place and state of trouble.
(e) Name and quantity of spare parts.
(Refer to the "17. MOTOR CONSTRUCTION DRAWINGS" for the part names.)
(3) Warranty period and coverage
(a) As a principle, Mitsubishi shall bear the cost of repairs resulting from equipment problems for a
period one year after product delivery, or 18 months from the time of shipment, whichever is
shortest.
(b) This warranty covers the shipped product only. Responsibility for customer losses or
compensation attributed to breakdown of this product are not covered by the warranty.
(c) For important machines, prepare spare machines or motors, or ensure the redundancy.
(d) The product modified or repaired by the customer is not covered by the warranty.
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