TM 5-3810-295-34
PART ONE
GENERAL
CHAPTER 1
INTRODUCTION
Section I.
GENERAL
1-1. Scope
a. This manual contains instructions for the use of
contained in the manual prior to repairing the equip-
Direct Support and General Support personnel
ment.
maintaining the model M320RT Rough Terrain Crane. It
NOTE
provides instructions for maintenance, as specified in the
In this manual reference to the crane or upper
Maintenance Allocation Chart (MAC) which is beyond the
portion of the vehicle and reference to the
scope of Operator/Crew or Organizational Maintenance
revolving frame are one and the same.
personnel.
c. All publications applicable to this manual are
b. This manual is divided into three parts. Part one
listed in appendix A.
covers description and data. Part two covers repair
1-2.
Forms and Records
instructions for the crane upper (revolving frame) portion
Maintenance records and reports which are used by
of the truck crane. Part three contains instructions for
maintenance personnel at all levels are listed and
repair of the carrier or truck portion of the crane.
prescribed in TM 38-750.
Maintenance personnel should read the instructions
Section II.
DESCRIPTION AND DATA
Oil pressure (rated speed) ................ 40 to 65 pounds per
1-3. Description
square inch
a. A general description of the model M320RT rough
Oil pressure (idle speed) ......................5 to 25 pounds per
terrain crane and information pertaining to the iden-
square inch
tification plates and equipment operating instructions
Ignition timing ...................... 21.0 before top dead center
are also contained in TM 5-3810-295-12.
Cooling .................................................................... Liquid
b. Descriptions of specific components and assem-
Rotation at flywheel end ....................... counter clockwise
blies pertinent to direct, general support personnel are
Firing order ............................................... 1-5-4-8-6-3-7-2
detailed in this manual.
Injection tappet clearance .................... 0.010-in minimum
1-4. Tabulated Data
Intake Valves .................................... 0.012 in (hot or cold)
a. General Maintenance data pertinent to direct
Exhaust Valves................................ 0.025 in (hot or cold)
and general support personnel is included in this
Electrical system ........................................................24 V
paragraph. TM 5-3810-295-12 includes additional data
(3) Upper engine
and should be referred to as required.
Manufacturer ....................................Detroit Diesel Allison
b. Tabulated Data
Model..................................................... 5043-7200 (4-53)
(1) Truck crane.
Type ........................................................................ Diesel
Manufacturer ....................... Harnischfeger Corporation
Bore ...................................................................... 3.875 in
Model................................................................ M320RT
Stroke ....................................................................... 4.5 in
Design ..................................................... Rough Terrain
Total displacement ........................................ 212/Cubic in
(2) Carrier engine.
Number of cylinders ........................................................ 4
Manufacturer ......................... Cummins Engine Company
Governor speed.................................... 2250 rpm full load
Model..................................................................... V903
Idle speed 550 i ...........................................................rpm
Type...................................................................... Diesel
Horse power ......................... 97 HP at 2250 rpm, full load
Bore ....................................................................... 5.5 in
Oil pressure (rated speed) ............ 40-60 PSI (30 psi Min)
Stroke ................................................................... 4.75 in
Oil pressure (idle speed) ........................................ 5-7 psi
Total displacement ....................................... 903 cubic in
Rotation at flywheel end ....................... counter clockwise
Compression ........................................................ 16.5: 1
Firing order ............................................................ 1-3-4-2
Number of cylinders .......................................................8
Injector tappet clearance
Governor speed................................ 2600 rpm, full load
Idle speed ................................................. 625 “ 25 rpm
Intake valves ............................................................ None
Exhaust valves ............. 0.025 inch (cold) 0.023 inch (hot)
Horse power .......................... 269 at 2600 rpm, full load
Electrical system ....................................................... 24 V
500 ft.85 F.
1-1
