Sakai SW800 Series, Shop Manual

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3-110
Inspection & Adjustment
1-2. Port relief valve
1) The gauge points are the same as those of
the main relief valve as described in steps
1-1-1) and 1-1-2) above.
2) Screw in adjusting screw (6) of main relief
valve (4) by 1/2 turns, and block the main
relief valve.
★ For the adjust screw, see Fig.
SW6503006.
3) Operate the frequency selector switch to
select MEDIUM FREQUENCY. For the
machines of the following machine
numbers, select CONT mode by means
of the CON/AUTO selector switch.
SW800: From Machine No.10123 SW850:
From Machine No.10127.
4) Start the engine and set the throttle to high
idle.
5) Select HIGH AMPLITUDE by operating the
amplitude selector switch. Operate the
vibrator by pressing the vibrator switch on
top of the F-R lever. Measure the port relief
pressure in the HIGH AMPLITUDE port.
★ Take the reading and shut down the
vibrator as quickly as practicable.
6) Select LOW AMPLITUDE by operating the
amplitude selector switch. Operate the
vibrator by pressing the switch on top of
the F-R lever. Measure the port relief pres-
sure in LOW AMPLITUDE port.
★ Take the reading and shut down the
vibrator as quickly as practicable.
★
The procedure (Starting the vibrator
➡
Pressure measurement
➡
Shutting
down the vibrator) in steps 5) and 6)
should not exceed 3 seconds.
7) When the measurement is complete,
restore the standard setting by screwing
out the adjusting screw of the main relief
valve by 1/2 turns and tightening locknut
(5).
8) Use the procedures in steps 1-1-3) to 1-1-
5) above to recheck the main relief valve
setting.
SW8003005
4
8
7