Installation Instructions

7 STEERING B1700·B2100·B2400 WSM,11770
Valve Assembly
1. Install the four top cover mounting nuts to the stud bolt
temporaly by hand.
2. Remove the stake of nut (1), then remove it.
3. Remove the valve assembly. Set the worm shaft horizontally
to remove each part easily.
(When reassembling)
11IIII IMPORTANT
lit Lightly tighten the nut (1) by hand, and while holding the
worm shaft (9), tighten
with a wrench. After tightening,
loosen the
nut approx. 0.17 rad. (10°), and stake the nut (1)
with a pin punch.
11IIII IMPORTANT
lit Do not disassemble the relief valve needlessly, since it has
been factory-adjusted.
1. Remove the centering springs (2) and reaction pistons (3).
2. Remove the spool (1) and remember the direction of it
against valve housing (4).
3. Remove the relief valve if needed.
(When reassembling)
lit Apply grease to seals in the valve.
11IIII IMPORTANT
• If the relief valve is disassembled, replace the adjusting
screw with new one, and after reassembly, be sure to adjust
the setting pressure, then stake the adjusting screw
with a
punch.
.. When the valve housing (4) or spool (1) are damaged,
replace them as a unit.
B177P200
B177F708
(1) Spool
(2) Centering Spring
(3) Reaction Pistons
(4) Valve Housing
(5) Relief Valve Poppet
(6) Relief Spring
(7) O-ring
(8) Adjusting Screw
(1) Nut
(2) Thrust
Race
(3) Thrust Needle Bearing
(4) Thrust
Race
(5) Valve Housing
Disassembling Valve Housing
(6) Thrust Race
(7) Thrust Needle Bearing
(8)
Th rust Race
(9) Worm Shaft
Power steering relief
11.28
to 11.77 MPa
Factory spec.
115
to 120 kgf/cm
2
va Ive setti ng pressu re
1636 to 1707 psi
7-58