Sakai SW880-1, Shop Manual

Page: 193 / 428

10-009
INSPECTION AND ADJUSTMENT
6. MEASUREMENT AND INSPECTION OF VIBRATOR
CIRCUIT PRESSURE
6-1. Measurement
CAUTION
Take care not to operate the vibratory drum for a
longer period of time than necessary with the machine
stationary. Otherwise, the vibrator bearing could be
seized.
Oil temperature during measurement: 50
± 5
°C (122
± 9
°F)
①
Remove plug from coupling (1), (2), (3) or (4) of vibrator
valve blocks. Attach pressure gauge with hose
ⓢ
and
connector
ⓤ
.
Coupling : 9/16-18UNF×M16
Adapter for hose
ⓢ
: M16 P=2.0
Pressure gauge connector
ⓤ
: M16×G3/8
Front drum low-amplitude side gauge port : (1)
Front drum high-amplitude side gauge port : (2)
Rear drum low-amplitude side gauge port : (3)
Rear drum high-amplitude side gauge port : (4)
Pressure gauge
: 0 to 50 MPa
(0 to 7,250 psi)
②
Apply parking brake by pressing parking brake switch
button.
③
Set vibration mode select switch to “ ”.
④
Set vibratory drum selector switch to “ ”.
⑤
Start the engine and set throttle switch to “Full”.
⑥
Press F-R lever vibration switch “ON”.
Then, read pressure gauge for maximum value of vibrator
circuit pressure.
⑦
Press F-R lever vibration switch “ON” as soon as
measurement is finished.
Maximum circuit pressure
(high pressure relief valve setting)
: 31.5
± 1.0
MPa (4,567
± 145
psi)
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SW880-10009
1 2 3 4
Vibrator valve block (F) Vibrator valve block (R)
SW880-10009
1 2 3 4
Vibrator valve block (F) Vibrator valve block (R)
PG003163
s u
PG003163
s u