Repair
3A7398A
17
6. To loosen the tension on the belt, locate and loosen
the two jam nuts on the adjusting screws for under
the motor mount plate using a 9/16” socket or
wrench and then using a 3/16” hex key back out the
tensioning screws until the drive belt is completely
loose.
7.
Hydraulic Model (25P472):
Lift the entire motor
mount plate assembly off and set it aside to allow
access to the drive belt.
Gas Model (25P473):
Lift the engine plate up about
4”. You may want to put blocks under the four
corners of the cover to fix it in the raised position and
hold up the engine. Or you can simultaneously lift
and cock engine slightly so that the belt can be slid
free from the pulley.
8. To install the new belt, remove the old belt and slide
the new one around the three pulleys and four
idlers. Tie a piece of string around the belt to pull it
out towards the motor pulley at reassembly time.
9. Lower the engine and belt cover and as you lower it
use the string to pull the belt over the motor pulley.
10. Using the tension screws begin to tighten the belt by
moving the engine away from the center of the
GrindLazer. Torque tensioning screws to 25-30 in-lbs
(2.8-3.4 N·m).
11.
Hydraulic Model (25P472):
After the belt has been
properly tightened, reconnect the GrindLazer to the
skid steer and allow it to run for 15-20 seconds to
allow the belt to set into the grooves of the pulleys
correctly.
Gas Model (25P473):
After the belt has been
properly tightened, reconnect the black battery cable
and both spark plug wires, and turn the starter button
to rotate the engine 15-20 revolutions to allow the
belt to set into the grooves of the pulleys correctly.
12. Reattach all the covers and the GrindLazer will be
ready for operation. Periodic tensioning of the belt
will ensure long belt life. Recheck belt tension again
after 30 minutes of use.
Bearing Replacement (Models
25P472 & 25P473)
Note the assemblies are matched in sets which assures
all three heads hit the working surface at the same time.
Tools required:
•
Two 3/4” socket or wrench
•
Flat head screw driver
•
3/16” hex key
1. To access the bearing assemblies, follow
Belt Replacement (Models 25P472 & 25P473)
page 16. Remove the drive bearing assemblies.
2. If it has not been done, remove the cutter heads.
Perform
, page 15, before
proceeding.
NOTICE
It is better to tension the belt tightly rather than
loosely. Loose belts will cause the belt to ride out of
the pulley grooves and break.
