18 MHP Operating & Maintenance Manual
MAINTENANCE
BLADE MAINTENANCE
• Wear leather work gloves at all times during
blade maintenance.
1.
Remove the blade as shown in Figure 21.
2. Grind all rough edges from each blade and clean
the blade seat.
3. Rotate the blade.
Note: Each blade has four edges, as shown in Figure
22 & Figure 23. Each time you rotate the blade, you use
a different edge. Replace blades when all edges are
rounded to .25” radius.
4.
Reinstall each blade using 500 ft. lbs. (680 Nm)
torque on each bolt.
• Stay at least 75 ft. (23 m) when moving.
5. Cycle the jaws closed. Measure the gap between
the upper and lower blade using a feeler gauge. If
the gap is larger than .030”, shim the blade.
Shimming the Blades
1. Measure the blade gap.
2.
Shim each blade so that the blade gap is
approximately .020”- .030”. Fit the shims between
the blade and the blade seat.
Note: Do not shim out a blade more than .125”. Doing so
may cause structural damage and will void the warranty.
A
B
180°
A
B
180°
A
B
C
D
A
B
D
C
BLADE PITCH ROTATION
Figure 22
BLADE ROLL ROTATION
Figure 23
BLADE & SHIM EXPLODED VIEW
Figure 21
SHIM
BLADE
BLADE SEAT
