UNCONTROLLE
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INTE
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ELECTRICAL AND MECHANICAL
ENGINEERING INSTRUCTIONS
VEHICLE H 983
Issue 1, Jul 11
1
DOLLY CONVERTER, HEAVY, TANK/PLANT TRANSPORTER, MC4
LIGHT GRADE REPAIR
This instruction is authorised for use by command of the Chief of Army. It provides direction, mandatory
controls and procedures for the operation, maintenance and support of equipment. Personnel are to carry out any
action required by this instruction in accordance with EMEI General A 001.
TABLE OF CONTENTS
Page No
Page No
General ..................................................................................1
Introduction .......................................................................3
Associated Publications ....................................................3
Authorised Personel..........................................................3
Safety Precautions ............................................................3
General Instructions ..........................................................3
Special Tools and Gauges ................................................4
Adjustment and Calibrations .............................................5
Functional Tests................................................................5
Replacement .....................................................................5
Adjustment Procedures .........................................................5
Axle Alignment.......................................................................5
Brake Adjustment ..................................................................6
Brake System Operating And Leakage Tests........................7
Functional Tests................................................................7
Replacement Procedures ......................................................9
Axles ......................................................................................9
Wheel Hubs.......................................................................9
Hubodometer .................................................................. 13
Specifications.................................................................. 13
Wheels ................................................................................ 13
Maintenance ................................................................... 13
Specifications.................................................................. 14
Brake System ...................................................................... 14
Brake System Maintenance............................................ 14
Brake Relay Valves ........................................................ 14
Boost Relay Valve .......................................................... 15
Spring Brake Control Valve ............................................ 16
Yard Release Valve ........................................................ 16
Spring Brake Chamber ................................................... 17
Brake Shoes. .................................................................. 18
Fault Finding ................................................................... 19
Specifications.................................................................. 20
Electrical.............................................................................. 20
Repairs ........................................................................... 20
Specifications.................................................................. 21
LIST OF FIGURES
Page No
Page No
Figure 1 Dolly Converter Axle Alignment Diagram..................5
Figure 2 Slack Adjuster Alignment ..........................................6
Figure 3 Wheel Hub Assembly - Exploded View..................... 9
Figure 4 Brake Drum and Wheel Nuts - Tightening
Sequence ....................................................................12
Figure 6 Brake Relay Valve Mounting .................................. 15
Figure 6 Spring Brake Control Valve Mounting .................... 16
Figure 7 Wheel Brake Assembly .......................................... 18
Figure 8 Dolly Converter Electrical Circuit Diagram ............. 20
LIST OF TABLES
Page No
Page No
Table 1 Maintenance Supply Item (MSI) Identification............ 4
Table 2 Special Tools..............................................................4
Table 3 Brake System Fault Finding..................................... 19
Table 4 12 Pin NATO Cable - Pins and Colour Codes .......... 20
