Adjustment - Sakai R2-4 Shop Manual

3-2. Adjustment

• If measurement results indicate the pressure deviating
from standard charge relief valve setting range, make an
adjustment in accordance with procedure described below.
① Check nut (2) of charge relief valve (1-7) 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
(3).
Adjustment screw turned clockwise
Adjustment screw turned counterclockwise
Pressure change rate
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.
(2) Nut : 52 N·m (38 lbf·ft)
N•m
(NOTICE)
• Carefully disassemble and reassemble after taking
steps to prevent foreign material from getting in.
• The number "1-7" appearing in above illustrations is consistent with lead line numbers shown in illustration of
propulsion pump in "2-2. Hydraulic Component Specifications" (page 4-008).
: Pressure rise
: Pressure drop
: 0.39 MPa/turn (57 psi/turn)
INSPECTION AND ADJUSTMENT
1-7 1-7
Charge relief valve Charge relief valve
SV510- -08008 SV510- -08008
R2-4-09004 R2-4-09004
2 2
3 3
9-005