KEENAN MechFiber 250 and
280 Operator’s Manual
28
Revision C01, 04
th
Dec 2019
8.4 Maintenance blades
Blade sharpening and/or replacement
, it is recommended that only KEENAN
Trained and/or qualified maintenance personnel should perform this task.
Blades need to be kept sharp. Blunt blades will increase power requirements. Sharpening
must be done without taking the temper from the blades (without overheating). Blades can be
sharpened many times, but when they reach the point where this is no longer practical,
they must be replaced.
8.5 Shear bolts
The following is the recommended grade shear bolt to be used with the KEENAN
MF250/MF280:
Table 4: Shear bolt
CAUTION:
Failure to use the correct grade of shear bolt can result in overload failure of the
machine and will invalidate your warranty.
8.6 Nuts and bolts
1.
After the first day, and regularly thereafter, inspect wheel nuts and tandem axle U-bolts
(where fitted).
2.
After the first week, and each week thereafter, check all nuts and bolts, including bearing
nuts, for tightness.
General Torque
Table 5.1: General torque for wheel studs
U-Bolt Diameter (mm)
Tightening Torque (Nm)
18
230
22
450
24
500
27
600
Table 5.2: Recommended torque for U-bolts for tandem axles (where fitted)
Machine type
Shaft
Shear Bolt
KEENAN 250
T50
M8 x 55 x 8.8
KEENAN 280
T50
M8 x 55 x 8.8
Stud / Bolt type
FT/LB N.M
M22
335
450
M20
260
350
M18
200
270
