Toro Reelmaster 5510 Series, Руководство по обслуживанию

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Fasteners with a Locking Feature (continued)
found on externally threaded fasteners such as screws, or on internally threaded
fasteners such as nuts. Locking features are designed to create friction, so even
after slight loosening, the friction continues to resist further loosening. Keep in
mind, a fastener with a locking feature usually means there will be friction during
assembly as well.
Most fasteners with a locking feature can be reused, but the force required to
loosen the fastener may decline with subsequent reuses which will reduce the
effectiveness of the locking feature. For this reason, Toro recommends replacing
fasteners with a locking feature once they have been removed. Knowing that
this is not always realistic, apply a threadlocker (Loctite) when reusing a fastener
with a locking feature. Use the appropriate strength and type of threadlocker
based on application, fastener size or information found in the product Operators
Manual, Service Manual, or Installation Instructions.
Note: If a fastener is removed that has had a threadlocker previously applied,
clean the fastener threads and apply new threadlocker to the fastener during
assembly.
Calculating the Torque Values When Using a Drive-Adapter Wrench
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Figure 6
1. Drive-adapter wrench 3. Torque wrench
2. Effective length of torque wrench 4. Effective length of torque
drive-adapter wrench
Using a drive-adapter wrench (e.g., crowfoot wrench) in any position other than
90° and 270° to the frame of the torque wrench will affect the torque value
measured by the torque wrench because of the effective length (lever) of the
torque wrench changes. When using a torque wrench with a drive-adapter
wrench, multiply the listed torque recommendation by the calculated torque
conversion factor (
Figure 6 ) to determine proper tightening torque. When using a
torque wrench with a drive-adapter wrench, the calculated torque will be lower
than the listed torque recommendation.
Example: The measured effective length of the torque wrench (distance from
the center of the handle to the center of the square drive) is 457 mm (18 inches).
The measured effective length of the torque wrench with the drive-adapter
wrench installed (distance from the center of the handle to the center of the
drive-adapter wrench) is 483 mm (19 inches).
The calculated torque conversion factor for this torque wrench with this
drive-adapter wrench would be 18/19 = 0.947.
If the listed torque recommendation for a fastener is 103 to 127 N∙m (76 to 94
ft-lb) , the proper torque when using this torque wrench with a drive-adapter
wrench would be 98 to 121 N∙m (72 to 89 ft-lb) .
Specifications and Maintenance: Torque Specifications Page 2–6 Reelmaster ® 5410/5510/5610 Series
15216SL Rev C