TRW TA S40 Series, Service Manual

Page: 30 / 60

Page 1-30 TRW TAS STEERING GEAR DocID
STEERING GROUP 0603-V-003-0207
File Last Modified: September 17, 2012 10:18 am
29
Separate rack
piston from worm
subassembly
24. Remove the input shaft, valve/worm, valve housing subassembly
from the rack piston.
Remove seal ring
and o-ring
25. Cut and remove the Teflon seal ring (27) and o-ring (28) from the
rack piston if not removed during disassembly step 19A.
26. Push poppet stems (24), they should spring back. Push poppet
seat (23), it should not move by hand. If components are bent or
broken, poppet stems don't spring back, or poppet seat moves
by hand, go to the
Poppets section on page 41. Otherwise,
proceed to step 27.
Inspect poppet
assemblies
Pocket knife
TRW recommends the poppet seat and
sleeve assemblies (23) not be removed
unless replacement of poppet components is required.
Inspect valve
housing and worm
screw
27. Inspect valve housing/worm screw subassembly for heat damage
or bearing roughness. If these conditions are present, or if there
was excessive internal leakage, or if preload adjustment is required,
go to
Valve Housing/Worm Screw procedures on page 43. If
not, proceed to step 28.
Remove steel balls
23. Remove the steel balls (34) from the rack piston (35) by rotating
the input shaft, valve worm assembly until the balls fall out.
Place the balls and return guides in a cup or other container.
Count the balls, and make sure all have been removed.
The steel balls are a matched set.
If any are lost, the entire set must be
replaced. Number of steel balls installed by model is:
TAS40-29, TAS55-31 (30 if date code is 33789 or earlier),
TAS65-32, TAS66-32, TAS85-34.