Jacobsen HR 5111, Service And Repair Instructions

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ELECTRICAL SYSTEM
SECTION 10B. FAILURE ANALYSIS
10B-3
10B
PROBLEM PROBABLE CAUSE REMEDY
IMPLEMENT CIRCUITS (Continued)
3. Only one wing does not a. Arm interlock switch not closing. a. Check switch/adjust (Section 2C).
come on.
b. Faulty arm interlock switch. b. Test switch (Section 10G).
c. Faulty motor valve solenoid. c. Check solenoid plug LED.
ON — Push manual override.
Mower comes on, test solenoid
(Section 10I).
Mower does not come on,
hydraulic problem (Section 8B).
OFF — Check switches and
wiring (Section 10C).
4. Only the front mower a. Arm interlock switch not closing. a. Check switch/adjust (Section 2C).
does not come on.
b. Faulty arm interlock switch. b. Test switch (Section 10G).
c. Faulty motor valve solenoid. c. Check solenoid plug LED.
ON — Push manual override.
Mower comes on, test solenoid
(Section 10I).
Mower does not come on,
hydraulic problem (Section 8B).
OFF — Check switches and
wiring (Section 10C).
5. Engine shuts down a. Faulty time delay relay. a. Test/replace (Section 10H).
immediately when oper-
b. Faulty wiring or bad electrical b. Test (Section 10C).
ator leaves seat. (Imple-
ground.
ment switch ON.)
6. Engine does not shut a. Faulty time delay relay. a. Test/replace (Section 10H).
down when operator
b. Faulty wiring or bad electrical b. Test (Section 10C).
leaves.
ground.
c. Interlock circuit electrically c. Reconnect to manufacturer’s
bypassed. specifications.
GAUGES AND PANEL LIGHTS
1. Engine oil pressure light a. Bulb burned out. a. Replace.
does not come on when
b. Faulty sending unit. b. Replace.
ignition switch is turned
ON.
c. Faulty wiring or bad electrical c. Test (Section 10C).
Ground BLU wire at
ground.
sending unit; light does d. 10 amp gauge/panel light circuit d. Reset/test (Section 10J).
not come ON, see a. breaker tripped.
Light comes ON, see b.
2. Engine oil pressure light a. Bulb burned out. a. Replace.
does not come on when
b. Faulty sending unit. b. Replace.
ignition switch is turned
ON.
c. Faulty wiring or bad electrical c. Test (Section 10C).
Ground GRY/WHT wire at
ground.
sending unit; light does d. 10 amp gauge/panel light circuit d. Reset/test (Section 10J).
not come ON, see a. breaker tripped.