Hobart Brothers 6910 Скачать руководство пользователя страница 15

Страница: 15 / 206

CHAPTER 1. DESCRIPTION/OPERATION

SECTION 1. DESCRIPTION

1. General

Four series of generator sets are covered by this manual: Series 6910, Series 6910A, Series 6910B, and
6910C.

Generator sets in Series 6910A are an improved version of the original Series 6910 generator sets.
Series 6910A generator sets feature armatures with Hoover Bearings, Browning Coupler, and differ-
ent magnetic pole construction for the generator revolving field. This new armature can be easily iden-
tified by the two copper rings on each end of the field coils and copper wedges between the magnetic
poles.

Generator sets in Series 6910B feature the same magnetic pole construction for the generator revolv-
ing field as Series 6910A generator sets. In addition, Series 6810B generator sets also feature wide-
type Fafnir bearings on the generator.

Generator sets in Series 6910C are identical to Generator sets in Series 6910B, except that the en-
gine has an improved fuel pump and a dual speed governing system for adjustment of idle speed and
rated speed.

Within a particular series, the basic generator set - including the engine, generator and all controls - is
identical for all units in the series. However, within a particular series different variations of the basic gen-
erator set are offered. Each variation is identified by a specification number, which is derived by adding a
dash number

(-1, -2, etc.)

suffix is to the Series number. The specification number generally indicates the

manner in which the particular individual unit is mounted, (such as trailer mounting, tow tractor mounting,
stationary mounting, truck mounting, etc.) and it may also indicate some other special feature of the unit.
Identification of different specifications within each series will be explained later in the Description.

Information and instructions throughout the manual apply to all specifications. Information which applies
only to a certain specification will be qualified and identified as such.

The purpose of the generator set

(Fig. 1)

is to generate and deliver regulated, 400-Hz electrical power to

a parked

(or towed)

aircraft for operation of the aircraft’s electrical equipment when the on-board gener-

ators are not running. The engine, generator, and controls are designed into a compact unit. See Figure
2 for specifications and capabilities.

2. Orientation

For purpose of orientation and to familiarize operators and maintenance personnel with the location of
components, the radiator is considered to be at the FRONT of the unit. The generator and controls are at
the REAR.

RIGHT and LEFT are determined by standing at the rear end facing the machine. Thus, the generator
control box, output receptacle connector, and engine control panel are mounted on the LEFT side at the
REAR of the unit.

3. Special Features

The generator set has many special features which are later described more fully under the assemblies in
which they appear. Some of the main features are mentioned here and described briefly.

OM-2028

May 1/91 Revised

1-1

Page 1