NMC-WOLLARD MB-4 200-DF, Operation, Maintenance And Parts Manual

Page: 53 / 321

Engines” manual included with this manual.
3.4.8 Check Brake Pedal Free Play
There should be ample travel remaining
when brakes are fully applied. The pedal
should be firm with no spongy feeling. If free
travel is excessive, but braking improves af-
ter “pumping” the pedal several times, there
may be air in the brake lines. Report condi-
tion to your supervisor. Also see 8.3.
Excessive free travel may also be caused by
worn brake linings, pads, or both.
3.4.9 Check Tire Condition and
Pressure
Inspect tire for cuts, nails, stones in the tread
or deterioration. Remove stones and other
foreign material imbedded in the tires. If
damaged, report condition to supervisor.
Also see 9.6.
Inspect wheels for cracks and other damage.
If damaged, report condition to supervisor.
Check air pressure using a proper gauge.
Pressure should be 90 PSI max. Add air as
required.
3.4.10 Check for Axle Oil Leaks
After tractor has been parked overnight,
check ground under axles for spots of oil.
Try to find the exact source of any leak and
report condition to your supervisor.
3.4.11 Inspect Drive Belt
See page 3-5 of the Cummins “Operation
and Maintenance Manual B Series Engines”
manual included with this manual.
3.5 EVERY 50 OPERATING HOURS
3.5.1 Check Hydraulic Oil Level
Remove the filler cap and observe fluid level
mark on filler screen. Maintain fluid level
within 1" - 2" on the screen.
3.6 EVERY 250 OPERATING HOURS
OR 3 MONTHS
3.6.1 Change Engine Oil and Oil Filter
See page 4-4 of the Cummins “Operation
and Maintenance Manual B Series
Engines” manual included with this man-
ual.
3.6.2 Check Air Cleaner Restriction
1. Remove the cover from the filter hous-
ing can. Then pull the outer, primary fil-
ter out of the can.
2. Do not remove the inner, secondary fil-
ter unless it is to be replaced. It is not
serviceable (cannot be cleaned).
3. If the secondary filter is removed, use a
rag to wipe the inside of the filter can
and can cover clean.
4. If the secondary filter is being replaced,
do so now. Do not attempt to clean this
filter.
5. Check the primary element for any
damage, and replace if any is discov-
ered.
Typically this element can be
cleaned and reused about six times, or
up to one year of service. To clean the
element, tap the sides to loosen dirt.
Then apply compressed air from the in-
side, through the pleats in the element
to force dirt out of the filter. The element
can also be washed in a warm water
and detergent solution.
The element
must be allowed to air dry before rein-
stalling. Do not dry with compressed air
or damage will result. See Figure 3-3.
3.6.3 Lubricate Grease Fittings
At each oil change, apply a high-quality
grease to all grease fittings. See Figure
3-1 for locations.
PAGE 3-7
JULY 31, 2006
M200 MB4 Tow Tractor Manual No. 42975