Sakai SW800-II, Руководство по ремонту

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9-003
INSPECTION AND ADJUSTMENT
2-2. Adjustment
If the measurement results indicate the pressure deviating
from the maximum circuit pressure range, make an
adjustment in accordance with the procedure described
below.
2-2-1. If the pressures on both the forward and
reverse sides deviate from the maximum
circuit pressure range by the same value
①
Check the locknut (3) of the cut-off valve (1-3) for
evidence of having loosened.
②
If there is evidence of the locknut having loosened, adjust
the cut-off valve so that the pressure becomes within
the maximum circuit pressure range while watching the
pressure gauge.
To adjust the pressure, loosen the locknut (3) and turn the
adjustment screw (4).
Adjustment screw turned clockwise
: Pressure rise
Adjustment screw turned counterclockwise
: Pressure drop
Pressure change rate : 10 MPa/turn (1,450 psi/turn)
③
If there is no evidence of the locknut having loosened,
remove the cut-off valve (1-3).
④
Check the removed cut-off valve for trapped dirt and
scratches on its seat.
⑤
If trapped dirt is present, disassemble and clean the cut-
off valve.
⑥
If a scratch is found on the seat, replace the cut-off valve.
⑦
After adjustment, measure the pressure again and check
that the pressure reaches the maximum circuit pressure
range.
(3) Locknut : 22 N·m (16 lbf·ft)
(1-3) Cut-off valve : 35 N·m (26 lbf·ft)
(NOTICE)
Carefully disassemble and reassemble after taking
steps to prevent foreign material from getting in.
The numbers such as “1-3” appearing in the above illustrations are consistent with the lead line numbers
shown in the illustration of the propulsion pump in “2-2. Hydraulic Component Specifications” (page 4-007 and
4-008).
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•
•
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SW800-09002
1-3
SW800-09003
3
4