Komatsu F30791, Shop Manual

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Machine model
PC20R-8
Classifi-
cation
Check item Test condition Unit
Standard
value
Permissible
value
Engine speed with
one pump at max.
pressure
.
Boom circuit: max. pressure
.
Hydraulic oil temperature: 45 ± 55ëC
.
Cooling circuit: in correct range
.
Engine oil pressure: in correct range
H
Measure when pressure has stabilised
rpm
2740 2690 ± 2790
.
Boom and swing circuit:
max. pressure
.
Hydraulic oil temperature: 45 ± 55ëC
.
Cooling circuit: in correct range
.
Engine oil pressure: in correct range
H
Measure when pressure has stabilised
2720 2670 ± 2770
Boom control
mm
<
a b
<
a b
Arm control
30 6 6 30 6 6
Bucket control
Swing control
Work equipment control
Blade control
20 6 6 20 6 6 Boom swing control
Travel control
Boom control
lever
.
At centre of
lever knob
.
Reading at
end of travel
.
Equipment
on the ground
.
Engine
stopped
.
Tip of pedal
Neutral
Raise
Lower
mm
70 60 ± 80
Arm control lever Neutral
Open
Curled
70 60 ± 80
Bucket control lever Neutral
Open
Curled
70 60 ± 80
Swing control lever Neutral
Swing RH
Swing LH
70 60 ± 80
Blade control lever Neutral
Raise
Lower
50 40 ± 60
Boom swing
pedal
Neutral
Swing RH
Swing LH
20 17 ± 23
Travel control
lever
Neutral
Forward
Backward
100 90 ± 110
Accelerator lever Min. Ð Max. 180 160 ± 200
Play of control lever
Work equipment,
swing
Max. 5 Max. 8
Travel Max. 10 Max. 15
. FOR THE MACHINE
20-4
PC20R-8 PC27R-8
Engine
Stroke
of
levers
and
pedals
Control
valve
RKP01970
ᐉ
a b
RKP01980
ᐉ
a b