Hitachi HT-4139-28 Maintenance Manual page 121

9.4 Checking the pressure of the Reverse Roller
9.4.1 Checking the pressure of the Reverse Roller
Check the pressure of the Reverse Roller when replacing the Reverse ASSY and the Soft Absorber
① Remove the Pick Unit ASSY and check the pressure of the Reverse Roller as shown below.
② The distance from the Dust Cover and the Reverse Arm ASSY should be 31mm. This position will be defined
as Pressure P
③ The Measured Load will be Pressure P = 3.5∓ 0.25N(350∓ 25g)
f the result is outside the appropriate measurement, adjust the position of the knob. A 2mm shift in the knob
will change 0.5N
Tension Gauge
Reverse Roller ASSY
Strong
Weak
Adjust screw
Pressure position
Tools Needed: Magnetic Philips Screwdriver (No.2),
Metric Ruler, Tension Gauge
End face
31mm
Dust Cover
REV0 10.02.15
-H9-5-