SANY SY135C8 - Engine Failures; Engine Troubleshooting Table

Troubleshooting
Safety, Operation and Maintenance Manual - Aug 20126-16
SY115C9/135C/155H Crawler Hydraulic Excavator
6.6 Engine Failures
6.6.1 Engine troubleshooting table
Check the engine according to the following table if any failure occurs to it. Contact your Sany
distributor to repair the engine.
Failure Causes Remedy
Unable to start the en-
gine
●
Battery low
●
Engine start switch internal failure
●
Pilot switch failure
●
Start motor failure
●
Open circuit of wire harness
●
Fuse failure (F1)
●
Short circuit of wire (grounding failure)
●
Alternator internal failure
●
Start relay failure
●
Brake failure
●
Recharge/replace the bat-
tery.
●
Replace
●
Repair/replace
●
Repair/replace
●
Check/repair
●
Replace
●
Check/repair
●
Repair/replace
●
Replace
●
Repair/replace
Rough engine speed
●
Open circuit of wire harness
●
Sensor internal failure
●
Short circuit of wire (grounding failure)
●
Sensor internal failure
●
Check/repair
●
Replace
●
Check/repair
●
Replace
Unable to power off the
machine
●
Battery relay failure
●
Breakdown of surge diode
●
Replace
●
Replace
Auto idle fails.
●
Boom-up signal failure
●
Boom-down signal failure
●
Arm-in signal failure
●
Arm-out signal failure
●
Bucket-dig signal failure
●
Bucket-dump signal failure
●
Swing signal failure
●
Travel signal failure
●
Attachment signal failure
●
Controller failure
●
Check/repair
●
Check/repair
●
Check/repair
●
Check/repair
●
Check/repair
●
Check/repair
●
Check/repair
●
Check/repair
●
Check/repair
●
Replace
Preheating function fails.
●
Preheat fuse failure
●
Preheat relay failure
●
Short circuit of wire (grounding failure)
●
Preheat controller failure
●
Replace
●
Replace
●
Check/repair
●
Replace
All devices fail.
●
Hydraulic lockout control failure
●
Short circuit of wire (grounding failure)
●
Failure of internal coil of pilot lockout valve
●
Repair/replace
●
Check/repair
●
Replace
Boom slow and weak
●
Sensor failure
●
Short circuit of harness (grounding failure)
●
Open circuit of harness
●
Controller failure
●
Replace
●
Check/repair
●
Check/repair
●
Replace