9.6.1 Set the Drive Belt Tension
WARNING!
Machine shown with shields removed for
illustrative purposes only. Never operate
machine with shields removed.
W001
For accurate measurement use a drive-belt tension gauge. If a
gauge is not available, the following method can be used.
1.
Turn the drive-belt tension bolt clockwise pulling the engine
to tighten the belt.
2.
Use your hand to check the drive-belt deflection. Press on
the top, center of the drive belt (
).
The drive-belt tension is correct when it does not deflect
more than 1/2" to 5/8" (12 mm to 16 mm). Adjust the
tension accordingly.
3.
Turn the drive-belt tension bolt accordingly. Be aware of the
drive-belt alignment while adjusting the drive-belt tension.
For more information, see
.
4.
When the drive-belt tension is correct, check belt
alignment.
5.
Do one of the following:
• If the drive-belt alignment is correct, use a calibrated
torque wrench to tighten the four engine mount bolts to
33 lbf•ft (45 N•m)
, and then continue with step 6.
• If the drive-belt alignment is not correct, align the drive
belt.
6.
Install the drive-belt guard.
7.
Check the drive-belt tension after 10 hours of operation.
01945
Fig. 26 –
Check the drive-belt tension
9.6.2 Align the Drive Belt
Check the drive belt alignment after every 8 hours of
operation.
For accurate measurement use a laser alignment tool. If a laser
alignment tool is not available, the following method can be
used.
The maximum offset (misalignment) is 1/32" (1 mm).
1.
On the side of the machine, remove the drive-belt guard.
2.
Place a straight edge along the inner face of the engine
clutch and back side of the rotor sheave (
). Check
the space between the drive belt and the straight edge. The
gap should be even along the length of the straight edge.
See .
3.
Do one of the following:
•
If the gap is even along the length of the straight edge,
install the drive-belt guard.
•
If the gap is not even along the length of the straight edge,
determine which is the best way to align the drive belt.
There are two ways to correct the drive-belt alignment:
• If the engine is not square to the chipper frame, turn
the engine on the mount.
For instructions, see
Align the Engine Mount on page
• If the rotor sheave has moved in or out on the shaft,
adjust the rotor sheave on the shaft.
For instructions, see
Align the Rotor Sheave on page
01946
1
2
4
3
Fig. 27 –
Drive belt alignment
1. Straight edge
2. Drive belt
3. Rotor sheave
4. Engine clutch
Service and Maintenance
BXMT3213
Trailer Chipper / Shredder
40