Mitsubishi Electric PLK-J2516R-YU Technical Manual page 45

(3) Pull out the thumb screw (No.2) from tensioner shaft (No.5). In this time the bearing (No.6) is removed
too.
(4) Remove the tension spring (No.1).
(5) After exchanging the tension spring (No.1) back the bearing (No.6) and thumb screw (No.2) in order.
Then tighten the set screw (No.4) and screw (No.3) in order.
NOTE 1 Bearing (No.6) is consist of three parts. Please taking care not to make misassembling by
referring following figure.
NOTE 2 Locate the groove of the tension disc (No.9) to the thread release pin (No.12) when removed
tension disc (No.9), (No.10) and tension disc holder (No.11).
<9>
<12>
<1>: Tension spring <2>: Thumb screw <3>: Set screw <4>: Set screw
<5>: Tensioner shaft <6>: Bearing <7>: bearing holder <8>: Washer
<9>: Tension disc <10>: Tension disc <11>: Tension disc holder
<12>: Thread release pin
<7>
<8>
<5>
<1>
<6>
<4>
<10>
<11>
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<8>
<2>
<3>