POWER TRAIN -680640037

TM 5-2420-224-20-1

OVERVIEW (CONT)

Page

Crane (HMMH) ................................................................................................................................

1-15

Crane Controls (HMMH) ..................................................................................................................

1-15

Hydraulic System

Front System ...................................................................................................................................

1-16

Rear System ....................................................................................................................................

1-16

Air System ...........................................................................................................................................

1-16

Machine (Hydraulic) Tools

Chain Saw (SEE)..............................................................................................................................

1-17

Pavement Breaker (SEE) .................................................................................................................

1-17

Hammer Drill (SEE) ..........................................................................................................................

1-17

Impact Wrench (HMMH) ...................................................................................................................

1-17

POWER TRAIN

Engine. The engine is an in-line six cylinder, four stroke-cylinder direct injection starting, valve-in-head type

diesel that develops 110 horsepower (81 kW). An ether injection system is connected to the air intake manifold to aid

in cold weather starting. The engine is water-jacket cooled. An engine oil sampling valve is supplied to easily obtain

a sample of the engine oil. (See page 2-14 for oil sampling procedures.)

Transmission. The transmission is manually operated with a single dry plate clutch. The main lever shifts all

speeds no matter what gear range or intermediate speeds are preselected. Intermediate speed controls are main

transmission reduction speeds and can be engaged and disengaged while driving in either forward or reverse. The

group shift selector has three shifting functions: Range I, Range II, and Reverse. The Power Take-Off (PTO) lever

engages and disengages the PTO when the clutch is fully depressed.

Drive Shafts. The purpose of the drive shafts is to transmit power to the axles from the transmission. The rear

axle drive, four-wheel drive, and differential locks located on both axles can be engaged pneumatically while driving

without interrupting the power flow.

Change 2

1-9