Sakai SV400D-2, Shop Manual

Page: 154 / 218

8-006
MEASUREMENT AND ADJUSTMENT OF PROPULSION CHARGE CIRCUIT PRESSURE
3-2. Adjustment
If the measurement results indicate the pressure
values deviating from the standard charge relief
pressure setting, make an adjustment in
accordance with the procedure described below.
①
Check for evidence that the locknut (2) of the
charge relief valve (1-10) was loose.
②
If evidence of looseness exists, watch the
pressure gauge while setting the charge relief
valve so that the standard charge relief valve
pressure setting is achieved.
To adjust the pressure, loosen the locknut (2)
and turn the adjustment screw (3).
Clockwise turning of adjustment screw
: Pressure rises.
Counterclockwise turning of adjustment screw
: Pressure drops.
Pressure change
: 0.29 MPa/rotation (42 psi/rotation)
③
If no evidence of looseness exists, remove the
charge relief valve (1-10).
④
Check for dust lodged in the removed charge
relief valve, and for damage to the seat surface.
⑤
If dust is present, disassemble and clean the
charge relief valve.
⑥
If the seat surface is scratched or damaged,
replace the charge relief valve.
⑦
After adjustment is completed, measure the
pressure again. Confirm whether the pressure
rises to the standard charge relief valve
pressure setting range.
Carefully disassemble and reassemble after
taking steps to prevent foreign material from
getting in.
Numbers such as 1-8 and 1-10 in the illustration
correspond to the leader numbers in the
propulsion pump drawing in section 2-3,
“Hydraulic equipment specifications” (page
4-007).
•
•
•
2
3
Charge relief valve
2
3
Charge relief valve
SV400-2-08004
1-10
SV400-2-08004
1-10