Komatsu PC58UU-3 User Manual

TROUBLESHOOTING H-18, H-19
PC58UU-3
20-535
1
H-18, H-19
★
Perform the following troubleshooting when the work equipment speed is normal.
H-18 Time lag is large (Engine speed is low)
H-19 Part loaded more moves slower in compound operation of
work equipment
Compound operation Heavier load side Lighter load side
1 Boom RAISE + Arm IN Boom RAISE Arm IN
2 Boom RAISE + Arm OUT Arm OUT Boom RAISE
3 Boom RAISE + Bucket CURL Arm OUT Bucket CURL
4 Arm OUT + Bucket DUMP Arm OUT Bucket CURL
5 Boom LOWER + Arm OUT Arm OUT Boom LOWER
Cause Remedy
1
When puppet and spring of
back pressure valve are
replaced, is trouble repaired?
NO
Defective suction
valve
Repair or
replace
YES
Defective back pres-
sure valve
Repair or
replace
Cause Remedy
Defective pressure
compensation valve
on lighter load side
Replace

Komatsu PC58UU-3 Specifications

General

Brand	Komatsu
Model	PC58UU-3
Category	Construction Equipment
Language	English