Mitsubishi Heavy Industries BD2GII User manual

TRACTOR
BD2GR
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2B1 02467uP3S1 00060-up
2B2 00775-UP 3S5 00098-up
2B3 00295UP3S6 00061-up
2B5 00883-up
2B6 01125-up
287 00047-up
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POWER TRA~N
CONTENS
SYSTEMS OPERAT~ON
TEST~NG AND ADJ.US11NG
D~SASSEMBLY AND
REASSEMBLY
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1

FOREWORD
This manual has instructions and procedures for the subject on the front cover. The information,
specification, and ifiustrations in this publication are on the basis of information that was current
at the time this issue was written.
Correct operation, maintenance, test and repair procedures will give this product a long service
life.. Before starting a test, repair orrebuildjob, the serviceman must read the respective sections
of this manual, and know all the components he will work on.
Safety precautions, skills and knowledge are listed in the descriptions of operations where hazards
exist. Warning labels have also put on the machine to provide instructions and identify specific
hazards which, if not heeded, could cause bodily injury or death to you or other persons. These
labels identify hazards which may not be apparent to a trained mechanic. There are many potential
hazards during repair for an untrained mechanic and there is no way to label the machine against
all such hazards. These warnings in this manual and on the machine are identified by this symbol:
This manual is divided in threeparts, SYSTEMS OPERATION, TESTING AND ADJUSTING
and DISASSEMBLy AND REASSEMBLY. In each part, however, a full explanation is not
given; the explanation is for the servicemen who have had a basic training or those with wide
experience.

INDEX
SYSTEMS OPERATION
General information 2
Direct drive (DD) 3
Direct power shift (DPS) 7
Flywheel clutch 11
Clutch hydraulic control 12
Direct drive (DD) transmission 13
Transmission control (DD) 15
Damper 16
Direct power shift (DPS) transmission 17
Transmission hydraulic control 20
Transmission control valve 22
Operation 23
Steering clutches, brakes and final drives 31
Steering clutch and brake controls 32
Steering clutch hydraulic control 33
Undercarriage 34
TESTING AND ADJUSTING
DPS transmission 38
Inching pedal 45
Transmission control lever 45
Steering clutches 46
Brake pedal 47
Clutch pedal 47
Clutch brake 48
Tracks 48
Troubleshooting 50

DISASSEMBLY AND REASSEMBLY
Engine removal and installation 66
Flywheel clutch 71
Direct drive (DD) transmission 81
Gear pump for transmission and steering clutches 89
DPS transmission 91
Transmission control valve 108
Transfer 110
Bevel gear 112
Damper 113
Steering clutches and brakes 115
Steering valve 126
Final drives 128
Undercarriage 132
Front idlers 133
Recoil cylinders and recoil springs 135
Track rollers 139
Tracks 142
Track carrier rollers 145
Special tools 148

SYSTEMS OPERAT~O~

SYSTEMS OPERATION
GENERAL 1NFORMATION
The BD2GII and BS3GII machines are either direct çlrive type or direct power shift type, the difference
being based on the type of a ~ansmission they use.’
Direct Drive Type Direct Power Shift Type
2

SYSTEMS OPERATION
Power from diesel engine 1 is sent to flywheel
clutch 2. The flywheel clutch is engaged and
disengaged manually. The output shaft of the
flywheel clutch drives the upper (input) shaft in
transmission 4 through a universal joint 3.
The transmission has three FORWARD and two
REVERSE speeds. The selection of these speeds
is done manually. The bevel pinion, at the rear of
the transmission, sends the power to bevel gear 5.
The power is then sent through steering clutches
6 into final drives 7, to the sprockets which drive
the tracks.
The engine and flywheel clutch are integrally
coupled and are mounted on the frame at four
places with cylindrical rubber mounts.
The transmission is housed in its own case which
is bolted to the front of the steering clutch cases.
Diiect Drive (DD)
1 Diesel engine
2 Flywheel clutch
3 Universal joint
4 Transmission
5 Bevel gear
6 Steering clutches
7 Final drives
8 Undercarriage
3