Manitowoc 2250 Service And Maintenance Manual

Reference Only
TROUBLESHOOTING 2250 SERVICE/MAINTENANCE MANUAL
10-38
Published 11-06-15, Control # 040-13
Test 4 — Electric Fuel Control (EFC) Box Test Points
NOTE: The C-525 engine fuel control is internal to the
engine, see engine manufacturer’s literature.
NOTE: To determine if correct voltage is available from the
hand and foot throttle, use a digital multi-meter to
test at EFC box. Use engine as ground contact
when testing following terminals.
To determine if correct voltage is available from engine RPM
transducer, use a digital multi-meter to test at EFC box.
While at low idle check for 5.25 volts AC between TB1-5 and
TB1-6.
If this reading is not obtained, engine RPM transducer may
require servicing. (See Test 6 — Cleaning and Adjusting the
Engine RPM Transducer.)
TB1 Test Points (N14-C450 Engine only)
TB-1-1 Battery (+)
TB-1-2 Battery (-)
TB-1-3 Actuator (3EFC)
TB-1-4 Actuator (4EFC)
TB-1-5 Magnetic pickup (24)
TB-1-6 Magnetic pickup (0)
TB-1-7 Shield
TB-1-8 Shield
TB-1-9 Remote speed potentiometer (68J)
TB-1-10 Remote speed potentiometer (68K)
TB-1-11 Remote speed potentiometer (68L)
TB-1-12 No contact
TB-1-13 No contact
TB-1-14 Gain select
TB-1-15 Gain select
SHIELD
MPU
-
~
ACT
-
+
BATTERY
151413121110987654321
GAIN
SELECT
TPI
GAIN
RUN
8V
4V
RMT
SPD
ILS
HIGH
LOW
CW
IDLE
SMOKE
REDUCTION
DROOP
A1161
With engine off and power on check for:
• 7.75 volts DC at TB1-9
• 4.40 volts DC at TB1-10
• 4.50 volts DC at TB1-11
While at low idle, check for:
• 7.80 volts DC at TB1-9
• 4.70 volts DC at TB1-10
• 4.55 volts DC at TB1-11

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English