Toyota T100 1996 Service Manual page 1786

Screw Extractor
1996 TOYOTA T100 (RM449U)
STEERING − POWER STEERING GEAR (4WD)
6. IF NECESSARY, REPLACE UNION SEATS
(a) Using a screw extractor, remove the 2 union seats from
the worm gear valve body assembly.
Z14510
(b) Using a hammer and an extension bar, tap in 2 new union
seats.
NOTICE:
Before installing the union seat, remove dust sticking to
the worm gear valve body assembly.
SR2811
SR−79