Adjustment - Sakai R2-4 Shop Manual

2-2. Adjustment

• If measurement results indicate the pressure deviating from
maximum circuit pressure range, make an adjustment in
accordance with procedure described below.
① Check nut (2) of multifunction valve (1-15) or (1-16) for
evidence of having loosened.
• Multifunction valve (Reverse) : (1-15)
• Multifunction valve (Forward) : (1-16)
② If there is evidence of nut having loosened, adjust
multifunction valve so that pressure becomes within
maximum circuit pressure 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
multifunction valve.
④ Check removed multifunction valve for trapped dirt and
scratches on its seat.
⑤ If trapped dirt is present, disassemble and clean
multifunction valve.
⑥ If a scratch is found on seat, replace multifunction valve.
⑦ After adjustment, measure pressure again and check that
pressure reaches maximum circuit pressure range.
(1) Nut
N•m
(2) Nut
(1-15)
Multifunction valve : 89 N·m (66 lbf·ft)
(1-16)
(NOTICE)
• Carefully disassemble and reassemble after taking
steps to prevent foreign material from getting in.
• The numbers "1-15" and "1-16" appearing in above illustrations are consistent with lead line numbers shown
in illustration of propulsion pump in "2-2. Hydraulic Component Specifications" (page 4-008).
: Pressure rise
: Pressure drop
: 9 MPa/turn (1,305 psi/turn)
: 41 N·m (30 lbf·ft)
: 20 N·m (15 lbf·ft)
INSPECTION AND ADJUSTMENT
1 1
2 2 3 3
Multifunction valve Multifunction valve
1-15 1-15
1-16 1-16
R2-4-09002 R2-4-09002
SV510- -08003 SV510- -08003
9-003