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M A I N T E N A N C E A N D I N S P E C T I O N
Figure 21 - Blade, spacers, and flanges set up
(Note: Shown with one spacer removed)
7.1.7
Screw on and tighten the blade nut with wrenches making sure
the face is flat against the outer flange. The blade shaft should be flush or
slightly stick out beyond the blade nut to ensure all the blade nut threads
are engaged. The outer flange pin should not touch the MC-800 chassis
and 1/2" hex bolts when rotating. Rotate blade by hand to verify proper
clearance and that the blade runs true (without wobbling). See Figure 30
and Figure 31. Never use a blade with interference or that does not run
true.
7.1.8
Lift up on blade guard and remove bolt in blade guard holding
bracket. Lower the blade guard down. Reinsert bolt and tighten nut to
prevent vibration. Always run a MC-800 with the blade guard in the down
position.
WARNING: Breathable silica may be generated by use of this product;
Silica can cause severe and permanent lung damage, cancer, and other
serious diseases. Do not breath the dust. Do not rely on your sight or smell
to determine if the dust is in the air. Silica may be in the air without a vis-
ible dust cloud. If air monitoring equipment for silica is not provided by your
employer at your work site, you MUST wear appropriate respiratory protec-
tion when using or servicing the machine. Consult your employer and OSHA
regarding the appropriate respiratory protection.
WORK
Figure 22 - Blade guard caster wheel adjustment
I
TER USTMENT
CAS
ADJ
NUT
ST BRUSH FIRMLY UCHING
DU
WORK SURFACE
TO
Surface Prep
Division
7.2.3
With the dust brush in the desired position, tighten the 3/8-inch
hex nut by turning it counterclockwise.
7.3
Checking and adjusting belt tension
The belt tension should be checked after the first hour of opera-
7.3.1
tion on a new MC-800 or new belt. On a used MC-800, the belt tension
should be checked once a day. With engine in the OFF position, remove the
four 5/16" hex bolts that attach the belt guard to the chassis.
Remove the belt guard. The belt should deflect no more than
7.3.2
1/16" under moderate finger pressure equidistant between the sheaves.
7.3.3
To tighten the belt, loosen the four 5/16" hex nuts that hold
the Vanguard engine to the chassis. Then, turn the 3/8" hex head bolt
clockwise on the front of the MC-800. This bolt can be seen as item #44 in
Figure 18.
7.3.4
After reaching the desired belt tension, verify that the belt
sheaves are properly aligned and the belt is straight. Retighten the four
5/16" hex nuts that hold the engine against the chassis.
7.3.5
Replace the belt guard with the four 5/16" hex bolts that were
removed in step 7.3.1. Never run a MC-800 without the belt guard in place.
7.4
Bearing lubrication
7.4.1
With engine in the OFF position, slowly tilt the MC-800 back until
the handle rests on the ground.
7.4.2
These bearings are exposed to excessive dust and require the
same brand of high quality grease as supplied by the factory. Apply ALVA-
NIA® Grease 3 with a hand grease gun to both flanged bearings on the
blade shaft after every 100 hours of use.
The performance of the bearing is greatly influenced by the quan-
7.4.3
tity of grease. For optimum performance, insert grease until a little bleeds
out from between the outer ring raceway and the perimeter of the slinger.
Wipe off excess grease.
7.4.4
Slowly tilt the MC-800 forward until all wheels are back on the
work surface.
7.5
Vanguard engine maintenance
See the section titled "Servicing your Vanguard engine" in the
7.5.1
Vanguard Engines Owner's Manual. This section includes
detailed information on:
7.5.1.1 The importance of maintenance
7.5.1.2 Maintenance safety and precautions
7.5.1.3 Maintenance schedule
7.5.1.4 Refueling
7.5.1.5 Engine oil level check, oil change, and recommendations
7.5.1.6 Air filter inspection
7.5.1.7 Air cleaner service
7.5.1.8 Sediment cup cleaning
7.5.1.9 Spark plug service
7.5.1.10 Idle speed adjustment
7.6
Transportation
Allow the MC-800 blade guard, blade, engine, and engine muffler
7.6.1
to cool.
7.6.2
See the section titled "Helpful tips and suggestions - Transport-
ing" in the Vanguard Engines Owner's Manual.
7.6.3
With engine in the OFF position, securely strap down MC-800 to
shipping pallet, trailer bed, etc. in normal upright position.
7.7
Trouble shooting
7.7.1
See the three sections titled "Helpful tips and suggestions, Tak-
ing care of unexpected problems, and Technical and consumer informa-
tion" in the Vanguard Engines Owner's Manual.
7.7.2
See Rx for Diamond Blade Safety by the Masonry and Concrete
Saw Manufacturers Institute for diamond blade
P: 877-817- 6687 F: 813-621-7125
Visit us at www.ussaws.com
sales@ussaws.com
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