Komatsu PC88MR-10 Shop Manual page 528

40 Troubleshooting
Related information on troubleshooting
No.
39 Speed or power of bucket is low
40 Boom swing speed or power is low.
41 Blade speed or power is low.
42 Work equipment does not move in single operation.
43 Hydraulic drift of boom is large.
44 Hydraulic drift of arm is large.
45 Hydraulic drift of bucket is large.
46 Flow rate of attachment circuit cannot be adjusted
47 Oil flow in attachment circuit cannot be controlled
In combined operation of work equipment , equipment having heavier load moves
48
slower.
49 In combined operation of swing and boom RAISE, boom rising speed is low.
In combined operation of work equipment or swing and travel, travel speed drops
50
largely.
51 Machine does not travel straight.
52 Travel speed is slow.
53 Machine is hard to steer or travel power is low.
54 Travel speed does not change, or travel speed is too slow or fast.
55 One of tracks does not run.
56 Alarm does not sound during travel.
57 Alarm does not stop sounding while machine is stopped.
58 Upper structure does not swing to the right or left.
59 Upper structure swing only to the right or left.
60 Swing acceleration or swing speed is low in both directions (right and left).
Swing acceleration performance is poor or swing speed is slow in only one
61
direction.
62 Upper structure overruns excessively when it stops swinging (both right and left).
63 Upper structure overruns excessively when it stops swinging (either right or left).
64 Shock is large when upper structure stops swinging.
65 Large unusual noise is heard when upper structure stops swinging.
66 Swing drift on a slope is large while swing parking brake is applied.
67 Swing drift on a slope is large while swing parking brake is released.
Upper structure does not swing while swing parking brake cancel switch is set to
68
CANCEL position.
Swing brake does not operate while swing parking brake cancel switch is set to
69
NORMAL position.
70 When starting switch is turned to ON position, machine monitor displays nothing
71 Engine coolant temperature monitor lights up in white while engine is running.
72 Hydraulic oil temperature monitor lights up in white while engine is running.
73 Charge level monitor lights up while engine is running.
74 Fuel level monitor lights up in red while engine is running.
75 Engine coolant temperature monitor lights up in red while engine is running.
76 Hydraulic oil temperature monitor lights up in red while engine is running.
77 Engine oil pressure monitor lights up in red while engine is running.
40-40
Problem
Problems related to combined operation
Problems related to travel
Problems related to swing
Problems related to machine monitor
Troubleshooting
Index
H-8
H-9
H-10
H-11
H-12
H-13
H-14
H-16
H-35
H-17
H-18
H-19
H-20
H-21
H-22
H-23, E-25, E-26
H-24
E-35
E-36
H-25
H-26
H-27
H-28
H-29
H-30
H-31
H-32
H-33
H-34
E-32
E-33
E-4
E-5
E-6
E-7
E-8
E-9
E-10
E-11
PC88MR-10