Hobart 90 C 20 Operation And Maintenance Manual page 65

9. Emergency Stop Assembly
A. Description of the Emergency Stop sensor
The emergency stop assembly, when requested as an option by a customer, may be used with all
generator set specifications covered by this manual. It is identified by Hobart Part Number 285958 .
Its purpose is to stop the engine in the event that a condition develops which could damage the gener-
ator set or endanger personnel, such as uncontrolled overspeed or an open flame in the interior of the
unit.
B. Location of the Emergency Stop sensor
The emergency stop switch is a red mushroom-shaped switch installed on the left side of the unit, on
the door that is just left of the engine control panel door. Engine schematic diagram 281886 in Chap-
ter 6 identifies the emergency stop switch as item S28.
C. Checking Operation of the Emergency Stop sensor
To check operation of the emergency stop switch:
(1) Turn the generator set ON and operate it at idle speed.
(2) Press the emergency stop switch. The engine should shut off immediately.
D. Replacement Parts for the Emergency Stop sensor
The following chart is a list of the major items which comprise the emergency stop sensor assembly,
except for hardware which is available from any hardware store. If it becomes necessary to replace
any of the items listed below, these items may be ordered from Hobart Brothers Company using their
part numbers as given below.
ITEM
Plate, Legend
sensor, Operator, PB, Mushroom
Guard, Mushroom Button
Sleeving, Yellow
Tie, Anchor, Cable, Plastic
Screw, M3.5 X 9.5 mm,
PAN-HD, SF-TAP
October 1/95 Revised
HOBART
PART No. REQUIRED
285681
77A-1157
285125
41502
400826-1
282909-1
OM-2031
NUMBER
1
1
1
60"
3
2
1-3
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