Jacobsen HR 5111, Service And Repair Instructions

Page: 228 / 339

ELECTRICAL SYSTEM
SECTION 10B. FAILURE ANALYSIS
10B-2
PROBLEM PROBABLE CAUSE REMEDY
GLOW PLUG CIRCUIT
1. Glow plugs do not a. Parking brake not set. a. Set brake.
come on.
b. Implement switch not in the OFF b. Push into OFF position.
position.
c. 50 amp tractor circuit breaker c. Reset/test (Section 10J).
tripped.
d. 10 amp shut-off system circuit d. Reset/test (Section 10J).
breaker tripped.
e. 50 amp glow plug/light circuit e. Test (Section 10J).
breaker tripped.
f. Faulty glow plug switch. f. Test (Section 10G).
g. Faulty glow plugs. g. Test/replace (Section 10L).
h. Faulty glow plug relay. h. Test/replace (Section 10H).
i. Faulty ignition switch. i. Test (Section 10G).
TRACTOR CIRCUITS
1. No 4 wheel drive. a. 4 wheel drive switch not ON. a. Turn ON.
b. Faulty solenoid. b. Check solenoid plug LED.
ON: Check voltage, 12 VDC.
NO — Check wiring (Section 10C).
YES — Change coil.
OUT: Check wiring (Section 10C).
c. Reverse sensing switch not c. Adjust (Section 2C).
adjusted.
d. Faulty reverse sensing switch. d. Test (Section 10G).
e. Faulty 4 wheel drive switch. e. Test (Section 10G).
f. Faulty 4 wheel drive valve. f. See Section 8B.
2. No differential lock. a. Differential switch not pushed. a. Push ON.
b. Faulty solenoid. b. Check solenoid plug LED.
ON: Check voltage, 12 VDC.
NO — Check wiring (Section 10C).
YES — Change coil.
OUT: Check wiring (Section 10C).
c. Faulty differential lock cylinder. c. See Section 4E.
IMPLEMENT CIRCUITS
1. Engine shuts down when a. No operator in seat. a. Sit in seat.
implement switch is pulled
b. Faulty seat switch. b. Test (Section 10G).
to the ON position.
c. Faulty time delay relay. c. Test/replace (Section 10H).
d. Faulty implement control switch. d. Test (Section 10G).
e. Faulty wiring or bad electrical e. Test (Section 10C).
ground.
2. Mowers do not come on a. Mowers not on the ground. a. Lower.
when implement switch
b. Direction control switches not in b. Push into CUT.
is pulled to the ON posi-
the CUT position.
tion. Engine stays running.
c. Faulty implement switch. c. Test (Section 10G).