Sakai R2H-2, Shop Manual

Page: 66 / 151

9-003
INSPECTION AND ADJUSTMENT
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 (1-22) or (1-23)
for evidence of having loosened.
• Multifunction valve (Reverse) : (1-22)
• Multifunction valve (Forward) : (1-23)
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
: Pressure rise
Adjustment screw turned counterclockwise
: Pressure drop
Pressure change rate : 9 MPa/turn (1,305 psi/turn)
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.
N•m
(1) Nut : 41 N·m (30 lbf·ft)
(2) Nut : 20 N·m (16 lbf·ft)
(1-22) and (1-23) Multifunction valve : 89 N·m (66 lbf·ft)
(NOTICE)
• Carefully disassemble and reassemble after taking
steps to prevent foreign material from getting in.
• The numbers “1-22” and “1-23” appearing in above illustrations are consistent with lead line numbers shown
in illustration of propulsion pump in “2-2. Hydraulic Component Specifications” (page 4-007).
R2H-2-09002
1-22
1-23
SV510-
ޓ
-08003
Multifunction valve
3 2
1