System description – MEGA Corp. MHT175-CAT777-OPS-1 User Manual
Page 9
 
MHT175-CAT777(G)-1
1 Aug 2012
SECTION 2
System Description
Contents
2-1
Coal Hauler Body (MHT) ………...…..... 2-1 
MHT Axle & Wheel Group ……............. 2-3 
Hitch Deck & Fender ………………....... 2-3 
MHT Brake System ……......................... 2-4 
 
MHT Door System ………….………….. 2-6 
MHT Lube System ……………………… 2-7 
MHT Lighting System …………….......… 2-7 
 
COAL HAULER BODY (MHT)
The MEGA 175 ton coal hauler is modular in 
construction and comprised of four major sub 
assemblies. The sub assemblies are the 
gooseneck, lower hopper, side walls and the 
rear bogie. 
 
Gooseneck Assembly 
 
 
 
 
 
 
 
 
 
 
 
The assembly is constructed of square steel 
tubes, plates and channels. It contains an 18” 
diameter hitch ball designed to be captured in 
the tractor hitch socket allowing the trailer to 
be towed. The compartment formed by the 
gooseneck plating is used for mounting and 
routing of all brake, door and electrical system 
components. Components can be accessed 
through the manhole covers mounted on the 
upper deck. 
 
 
 
 
 
 
 
 
 
 
Lower Hopper Assembly 
 
 
 
 
 
 
 
 
The assembly is constructed of square steel 
tubes, bolsters and plates. It provides for 
mounting of door assemblies, hydraulic 
actuators and lubrication blocks. The bolster 
passage ways provide for the routing and 
protection of hydraulic brake and door hosing 
as well as electrical cabling. 
 
Side Wall Assembly 
 
 
 
 
 
 
 
 
 
 
 
 
The walls are constructed of steel tubes and 
plates. They provide for mounting of 
clearance lights, side boards and load markers. 
 
REAR VIEW
TOP VIEW
SIDE VIEW