Sakai SW300-1, Руководство по ремонту

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9-005
INSPECTION AND ADJUSTMENT
3-2. Adjustment
• If measurement results indicate the pressure deviating from
standard charge relief pressure setting range, make an
adjustment in accordance with procedure described below.
①
Check nut (1) of charge relief valve (1-13) for evidence of
having loosened.
②
If there is evidence of nut having loosened, adjust charge
relief valve so that pressure becomes within standard
charge relief valve pressure setting range while watching
pressure gauge.
• To adjust pressure, loosen nut and turn adjustment screw
(2).
Adjustment screw turned clockwise
: Pressure rise
Adjustment screw turned counterclockwise
: Pressure drop
Pressure change rate : 0.19 MPa/turn (27.6 psi/turn)
③ If there is no evidence of nut having loosened, remove
charge relief valve.
④ Check removed charge relief valve for trapped dirt and
scratches on its seat.
⑤ If trapped dirt is present, disassemble and clean charge
relief valve.
⑥ If a scratch is found on seat, replace charge relief valve.
⑦
After adjustment, measure pressure again and check that
pressure reaches standard charge relief valve setting
range.
N•m
(1) Nut : 24 N·m (18 lbf·ft)
(NOTICE)
• Carefully disassemble and reassemble after taking
steps to prevent foreign material from getting in.
• The number “1-13” appearing in above illustrations is consistent with lead line numbers shown in illustration
of propulsion pump in “2-2. Hydraulic Component Speci fi cations” (page 4-010).
SW300-1-09026
1-13
SV520-08004
1
2
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