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ELECTRICAL AND MECHANICAL 
ENGINEERING INSTRUCTIONS 

VEHICLE H 983 

Issue 1, Jul 11 

 

 

GENERAL 

Introduction 

1. 

This EMEI details all Light Grade Repair procedures for the Dolly Converter, Heavy, Tank/Plant Transporter, 

MC4. 

Associated Publications 

2. 

Reference may be necessary to the latest issue of the following documents: 

a. 

Defence Road Transport Instructions (DRTI)

b. 

Technical Regulation Of ADF Materiel Manual - Land

 (TRAMM-L); 

c. 

TGM 120 – Record Book for Service Equipment – Army; 

d. 

EMEI Vehicle H 980

 – Dolly Converter, Heavy, Tank/Plant Transporter, MC4. – Data Summary; 

e. 

EMEI Vehicle H 982

 – Dolly Converter, Heavy, Tank/Plant Transporter, MC4 – Technical 

Description; 

f. 

EMEI Vehicle H 989

 – Dolly Converter, Heavy, Tank/Plant Transporter, MC4 – Servicing Instruction; 

g. 

RPS 02217 - Dolly Converter, Heavy, Tank/Plant transporter, MC4

 

Authorised Personel 

3. 

Repairs are to be conducted by technical tradespersons: Army Vehicle Mechanic, RAAF GSE Fitters, or Civil 

equivalents authorised in accordance with the requirements of the Para 2.b. 

Safety Precautions 

 

Personnel working on this equipment are to adhere to all industrial safety 
standards, work practices and equipment operating and maintenance 
instructions relating to the equipment. 

Some assemblies contain powerful springs and injury can result if they are not 
properly disassembled. Use only proper tools and observe all precautions 
relevant to the use of the tools. 

General Instructions 

4. 

It is vitally important that dirt and other foreign matter are not allowed to enter the hydraulic system during 

repairs. Dirt or fluid other than clean hydraulic fluid in the system will cause almost immediate failure. Plug or protect 
openings to prevent dirt entering the system. Use plastic plugs or covers only for this purpose. Do not use cloth or 
paper as plugs or covers. 

5. 

Disconnect the dolly converter electrical connector from the towing vehicle before removing any electrical 

system components. 

6. 

When disconnecting electrical connectors, hoses and fittings, remove sufficient clamps in order to gain the 

necessary slack to avoid damage to connectors and fittings. Re-install all clamps and supporting devices as installed by 
manufacturer. 

7. 

Use only genuine replacement parts and components. 

8. 

Replacement hardware, tubing, hose fittings, etc., should be of equivalent size, type, length and strength as the 

original equipment. 

9. 

Use only those lubricants specified in the Servicing Instruction EMEI Vehicle H 989 and the User Handbook. 

10. 

Any fastenings of fittings being tightened to prescribed torques are to have dry, clean threads unless otherwise 

specified. When specified, thread sealants are to be applied to dry, clean, oil free threads.  

Summary of Contents for H983

Page 1: ...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 R...

Page 2: ...UNCONTROLLED IF PRINTED VEHICLE H 983 Issue 1 Jul 11 ELECTRICAL AND MECHANICAL ENGINEERING INSTRUCTIONS 2 Blank Page...

Page 3: ...ies contain powerful springs and injury can result if they are not properly disassembled Use only proper tools and observe all precautions relevant to the use of the tools General Instructions 4 It is...

Page 4: ...fication Serial Item Location 1 Axle assemblies Centre of axle beam opposite brake chamber mountings 2 Fifth wheel Leading edge of fifth wheel Special Tools and Gauges 13 The following special tools a...

Page 5: ...es replacement and or repair of the following components a Axles 1 hubs 2 hub seals 3 hub bearing cups and 4 hubodometer b Wheels c Brakes 1 brake relay valves 2 boost relay valve 3 spring brake contr...

Page 6: ...applicable radius rod to alter the axle alignment NOTE Dimensions X and Y are to be equal along each side of the trailer BRAKE ADJUSTMENT 20 The correct brake adjustment is obtained when a The distanc...

Page 7: ...ake control valve indicates a faulty valve Failure of individual brake chambers to release indicates a faulty brake chamber or air line 29 Allow the prime mover to build up full air pressure and then...

Page 8: ...d release valve to release the spring brakes Ensure that all spring brakes are released NOTE Failure to do so indicates a faulty yard release valve 39 Drain the air from the dolly converter air tanks...

Page 9: ...heel nuts c Place a suitable jack beneath the applicable axle and raise the wheel clear of the ground d Place a safety stand beneath the axle e Lower the axle to the stand ensuring that the wheels rem...

Page 10: ...l Remove the wheel bearing cups as follows a Remove the hub and hub seals as detailed in Para 45 and 46 b Place a long brass drift through the hub centre against the inner face of the respective beari...

Page 11: ...ged edges to prevent brass chips being dislodging into the wheel hub and bearings d Place the bearing cup Figure 3 4 or 6 smaller internal diameter innermost in position on the hub and drive it into p...

Page 12: ...f one quarter of a turn using the hub nut tube wrench Table 2 Serial 3 NOTE Spin the hub while tightening the bearing adjusting nut Ensure that the air tank is fully charged and that the brakes are re...

Page 13: ...ications 54 The axle group specifications are as follows a Axle alignment tolerance 1 mm b Maximum wheel runout 2 mm c U bolt torque 415 N m 310 lb ft d Radius rod mounting bolt torque 100 N m 80 lb f...

Page 14: ...e tools Always chock vehicle wheels Stop the engine when working under a vehicle liable to roll Keep hands away from chamber push rods and slack adjusters they may apply as system pressure drops Never...

Page 15: ...tall the valve to the air reservoir and secure it by applying a spanner to the hexagon area of the mounting nipple d Connect the air lines to the valve according to the labelling attached during remov...

Page 16: ...at the spring brake valve Figure 6 d Apply a spanner to the hexagon area of the reservoir mounting nipple and remove the valve from the reservoir 64 Installation Install the spring brake control valve...

Page 17: ...NOTE Pull the tool to ensure that the lugs are properly engaged in the pressure plate d Tighten the nut onto the release tool and continue turning withdrawing the release tool from the housing NOTE Th...

Page 18: ...e mountings f Remove the brake shoes Figure 7 6 and separate them from the return spring Figure 7 7 70 Installation Install the brake shoes as follows a Fit the return spring Figure 7 7 to the two bra...

Page 19: ...air line or hose Brake shoe return spring weak or broken Replace spring Spring brake chamber diaphragm faulty Replace brake chamber 4 Brakes do not release Faulty spring brake control valve or relay v...

Page 20: ...pins D L b All wiring is to be installed in soft conduit 73 An electrical circuit diagram for the dolly converter is shown in Figure 8 Pin and colour codes for the 12 pin NATO connector are listed in...

Page 21: ...ul 11 21 Specifications 74 The electrical system specifications are as follows a System voltage 12 V DC b Remote control current winch 1 A c Solenoid valve current winch 2 5 A d Connector plug 12 pin...

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