Komatsu PC58UU-3 User Manual

20-501
1
TROUBLESHOOTING FOR
HYDRAULIC AND MECHANICAL SYSTEMS
(H-MODE)
H-MODE
TABLE OF FAILURE MODES AND CAUSES................................................................................................ 20-504
H-1 Speed or power of work equipment (including blade), travel, and swing systems is low.... 20-506
a) Speed or power of two or more of work equipment (boom, arm, and bucket),
travel, swing, and blade systems is low ............................................................................... 20-506
b) Speed or power of work equipment (excluding blade), travel, and swing systems
is low........................................................................................................................................ 20-507
c) Speed or power of work equipment (excluding blade) and travel systems is low ........... 20-507
d) Speed or power of swing and blade systems is low ........................................................... 20-508
e) Speed or power of travel and blade systems is low............................................................ 20-508
f) Speed or power of work equipment (excluding blade) is low............................................ 20-509
g) Speed or power of travel and swing systems is low ........................................................... 20-509
H-2 There is excessive drop in engine speed or engine stalls........................................................ 20-510
H-3 Two or more of work equipment (boom, arm, bucket, and offset), travel, swing,
and blade systems do not move ................................................................................................ 20-512
a) Work equipment (including blade), travel, and swing systems do not move ................... 20-512
b) Work equipment (excluding blade), travel, and swing systems do not move .................. 20-513
c) Work equipment (excluding blade) and travel systems do not move ............................... 20-513
d) Swing and blade systems do not move ............................................................................... 20-513
e) Travel and blade systems do not move................................................................................ 20-514
f) Work equipment (excluding blade) system does not move ............................................... 20-514
H-4 Abnormal noise generated (from around pump)...................................................................... 20-515
H-5 Fine controllability is poor or response is low .......................................................................... 20-516
(Two or more systems have poor fine controllability or low response simultaneously) ...... 20-516
H-6 Boom speed or power is low (Other work equipment is normal) ........................................... 20-517
a) Boom RAISE speed or power is low ..................................................................................... 20-517
b) Boom LOWER speed or power is low................................................................................... 20-518
H-7 Arm IN speed or power is low .................................................................................................... 20-519
a) Arm speed or power is low (Other work equipment is normal) ......................................... 20-519
b) Arm OUT speed or power is low........................................................................................... 20-520
H-8 Bucket CURL speed or power is low .......................................................................................... 20-521
a) Bucket speed or power is low (Other work equipment is normal) .................................... 20-521
b) Bucket DUMP speed or power is low ................................................................................... 20-522
H-9 Offset LEFT speed or power is low............................................................................................. 20-523
a) Offset boom speed or power is low (Other work equipment is normal) ........................... 20-523
b) Offset RIGHT speed or power is low..................................................................................... 20-524
H-10 Boom does not RAISE ................................................................................................................. 20-525
a) Boom does not move ............................................................................................................. 20-525
b) Boom does not LOWER.......................................................................................................... 20-526
H-11 Arm does not move in................................................................................................................. 20-527
a) Arm does not move................................................................................................................ 20-527
b)Arm does not move out ........................................................................................................... 20-528
H-12 Bucket does not curl .................................................................................................................... 20-529
a) Bucket does not move............................................................................................................ 20-529
b) Bucket does not dump ........................................................................................................... 20-530
H-13 Offset boom does not move to left ............................................................................................ 20-531
a) Offset boom does not move .................................................................................................. 20-531
b) Offset boom does not move to right..................................................................................... 20-532
H-14 Hydraulic drift of boom is large.................................................................................................. 20-533
H-15 Hydraulic drift of arm is large ..................................................................................................... 20-533
H-16 Hydraulic drift of bucket is large................................................................................................. 20-534
H-17 Hydraulic drift of offset boom is large ....................................................................................... 20-534
a) Hydraulic drift of offset boom to left is large ....................................................................... 20-534
b) Hydraulic drift of offset boom to right is large..................................................................... 20-534
H-18 Time lag is large (Engine speed is low) ..................................................................................... 20-535
PC58UU-3

Komatsu PC58UU-3 Specifications

General

Brand	Komatsu
Model	PC58UU-3
Category	Construction Equipment
Language	English