Section H - Steering
Hydraulic Steering Unit
Dismantling and Assembly
H-5 H-5
9803-9340-8
Dismantling
The illustrations show a typical steering unit. Use the
numerical sequence as a guide to dismantling. The relief
valve (items 29 - 35) is not used in this application.
During manufacture, a small mark X will have been made
on sleeve 12 and spool 15, close to one of the slots for the
centring springs 13. Before removing the centring springs,
check that this mark is visible; if not, make a new mark to
ensure correct assembly.
Assembling
1 Fit spool 15 into sleeve 12, aligning slots for centring
springs 13 and checking that the small marks X are
aligned. Ensure that three slots in spool partially
uncover three holes in sleeve, as at A.
2 Fit two flat centring springs 13 with four curved
springs between them, as shown at B.
3 Fit seal 24 into steer unit body and insert sleeve of
tool 892/00180. Fit back up ring 20 and seal 21 onto
plastic boss, and position on tool spindle, as shown.
4 Lower steering unit body and tool sleeve over tool
spindle until plastic bush is flush with end of bore.
Assemble sleeves 12 and 15 with cross pin 14 and
centring springs 13. Fit bearing components 16 to 19
with chamfered face of 17 facing away from bearing
18.
5 Remove body from tool leaving plastic bush in
position, and lower body over assembled spool.
6 Apply downward pressure on body until plastic boss
is forced out of bore, leaving seals correctly located
K Fig 4. ( T H-5).
229680-1
Fig 3.
229690-1
Fig 4.
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