Komatsu 75001, Shop Manual

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SEN03838-00
WA250, 250PZ-6 30-130
59
130 Testing and adjusting, Part 3
Pm clinic inspection chart
Pm clinic inspection chart
1
WA250-6 Serial No. 75001 and up
Questions asked to operator, walk around inspection
a If the machine is cold, warm it up fully. <>: Reference value
Machine serial No.
Hours inspection Engine serial No. SAA6D107E-1 #
Work order No. Date of execution Service Meter Serviceman
Year: Month: Day: h
Was there any abnormality before inspection started?
Ambient temperature
Max. °C
Min. °C
Altitude m
Max. coolant temp. (During operation) Max. HST oil temp. (During operation)
Segment color W G G G G R R
1 2 3 4 5 6 7
Segment color G G G G G R R
1 2 3 4 5 6 7
Item Conditions Unit
Standard
value for new
machine
Service limit
value
Measurement
results
Pass Fail
E
n
gi
ne
Engine speed
Low idle
rpm
775 – 850 775 – 850
High idle 2,175 – 2,295 2,175 – 2,295
HST stall 2,080 – 2,280 1,980 – 2,295
Hydraulic stall 1,970 – 2,170 1,870 – 2,270
Full stall (HST stall + hydraulic stall) 1,840 – 2,170 1,740 – 2,270
Blow-by
pressure
At rated output
kPa
{mmH
2
O}
Max. 0.98
{Max. 100}
1.96
{200}
Oil pressure SAE15W-40
High idle
MPa
{kg/cm
2
}
Min. 0.29
{Min. 3.0}
0.25
{2.5}
Low idle
Min. 0.10
{Min. 1.0}
0.07
{0.7}
a Before starting the inspection, check that the machine does not move when the directional lever is placed in position.
k
When measuring the transfer clutch control pressure, carry out the measurement at a place where the machine can travel
safety at a speed of more than 10 km/h.
HS
T
High-pressure
cut-off pressure
• Engine:
Full throttle
•
Hydraulic
oil temp.:
45 – 55°C
Directional lever: F
Speed selector
switch: 2nd
Traction control
switch: ON
MPa
{kg/cm
2
}
44.6 – 46.6
{455 – 475}
43.1 – 46.6
{440 – 475}
Low-pressure
relief pressure
(work equip-
ment PPC cir-
cuit basic
pressure)
Directional lever: N
2.6 – 2.8
{26.5 – 28.5}
2.5 – 2.8
{25.5 – 28.5}
Servo piston
control pres-
sure
Directional lever: N
Brake: released
2.6 – 2.8
{26.5 – 28.5}
2.5 – 2.8
{25.5 – 28.5}
Directional lever: N
Brake: pressed Max. 0.6
{Max. 6}
Max. 0.6
{Max. 6}
Servo piston
actuation pres-
sure
Directional lever: For-
ward and reverse
Gear speed selector
switch: 1st
Travel speed control
dial: Min. side
Measure while driv-
ing at full throttle
(Approx. 5 km/h).
2.6 – 2.8
{26.5 – 28.5}
2.4 – 2.8
{24.5 – 28.5}
Transfer clutch
control pres-
sure
Hydraulic oil
temp.:
45 – 55°C
Directional lever: F
Speed selector
switch: 3rd or 4th
2.6 – 2.8
{26.5 – 28.5}
2.5 – 2.8
{25.5 – 28.5}