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

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1.1 PURPOSE OF THIS MANUAL
This manual is meant to provide the infor-
mation necessary to operate, maintain, and
repair the aircraft towing tractor (“tractor”),
model number 200, manufactured by
NMC-Wollard, Inc., Eau Claire, WI 54702,
phone 715-835-3151.
1.2 ARRANGEMENT OF THIS MANUAL
This manual is divided into Sections. Sec-
tions 1 through 9 are the introduction, spec-
ification, preventive maintenance,
operation, and repair sections.
Section 10 is the Illustrated Parts Break-
down (IPB). The IPB shows all parts and
part numbers necessary for support of the
tractor. The IPB can be used for requisition-
ing and identifying parts. It is arranged in al-
phabetical order.
1.3 DESCRIPTION OF THE TRACTOR
The tractor is designed for towing loads
weighing up to 160,000 lbs. Towing cou-
plers are on the front and rear of the tractor.
The four-wheel-drive tractor operates like
most automotive vehicles powered by an in-
ternal combustion engine. The major differ-
ence between this tractor and an
automobile having a similar size engine is
the higher gear ratio in the rear axle. The
higher gear ratio allows great pulling (tow-
ing) ability.
1.3.1 Frame
Heavy-duty precision aligned, 1-piece struc-
ture. Main frame plates are 1.25” thick. Side
panels and fenders are .75” thick. Front and
rear bumpers are 1.00” thick.
1.3.2 Engine for Tractor w/Hydraulic
Brakes
Cummins 6BT5.9, 6 Cylinder, 5.9 Liter, 152
BPH @ 2200 rpm, Torque 414 ft. lbs. @
1200 rpm.
1.3.3 Engine for Tractor w/Air Brakes
Cummins 6BT5.9, 6 Cylinder, 5.9 Liter, 148
BPH @ 2200 rpm, Torque 440 ft. lbs. @
1600 rpm.
1.3.4 Cooling System
40 quart coolant capacity for engine-radia-
tor system. Radiator insulated from vibra-
tion.
1.3.5 Transmission
Standard Funk 2000 Power Shift automatic
with 6 speed forward and 3 reverse, full
time four wheel drive (4x4), canister type oil
filter, separate transmission fluid cooler,
gear-driven pump for power steering and
brakes. Integral no-spin differential allows
front and rear axles to rotate independently-
prevents drive line windup and stress. No
spin feature joins axles together for maxi-
mum tractive effort if wheel slippage occurs.
Forward and reverse speed ranges are ob-
tained through the use of hydraulically actu-
ated multiple disc clutches. these clutches
are power absorbing members that can be
engaged at full engine power. Shifting un-
der full engine power makes this model a
full power shift for the forward and reverse
motion in all four speeds.
The clutches in this unit are hydraulically
applied and spring released. Because
wear, which eliminates the need for adjust-
ment. Each clutch uses eleven semi metal-
lic friction plates, and eleven polished steel
M200 MB4 Tow Tractor Manual No. 42975
PAGE 1-2
OCTOBER 30, 2001