JLG 500RTS ANSI Service Manual - Manual (Page 57)

SECTION 3 - TROUBLESHOOTING
3121103 – JLG Sizzor – 3-7
Table 3-3. Chassis Troubleshooting
TROUBLE PROBABLE CAUSE REMEDY
ENGINE
Engine will not start
Station power selector switch is not in required
position Actuate switch as required
Circuit breaker open Determine and correct cause. Reset circuit breaker
Start lockout solenoid not working Replace solenoid
Start switch defective Replace start switch
Defective anti-dieseling solenoid on carburetor Replace solenoid or carburetor
Damaged wiring in ignition circuit (broken wire on
starter repair or replace wiring
Ignition switch not functioning properly Replace switch
Defective ignition module Replace ignition module
Ignition circuit shorted to ground Repair circuit card as required
Battery cable(s) not making contact Clean and tighten cables
Engine will not star (Ignition O.K.)
No fuel Replenish fuel as necessary
Restricted or broken fuel line Clean or replace line
Battery defective or requires charging Charge or replace battery as required
Engine will not accelerate above low speed
Damaged wiring on speed control switch on gover-
nor solenoid Repair or replace wiring
Speed control switch not functioning properly Replace switch
Defective precision governor (Ford) Repair or replace governor
Defective Adeco throttle actuator (Deutz) Repair or replace actuator
Governor not functioning properly Repair or replace governor
Defective electronic governor Replace governor
Engine will not decelerate below high speed
See engine will not accelerate above low speed