DRESSTA TD-25M EXTRA, Service Manual, Page: 243 / 595

STEERING DRIVE
SECTION 7E
Page 31
DRESSTA TD-25M EXTRA
TWO SPEED STEERING VALVE
6. Remove rear cover (2) from the rear of valve housing (1). Exert pressure on the cover to
counteract the spring tension. Discard gasket (3).
WARNING! Spring loaded assembly. Assembly must be held with bracket to
relieve spring pressure. Use extreme care when disassembling
7. Remove metering spools (26) and spool sleeves (30) from rear of housing (1) using care so
not to scratch or score inside diameter of sleeves (30). Remove spring (10), shims (11), and
poppet (12) from brake spool (13) in housing (1).
8. Unscrew hydraulic connectors (29) with O-rings (31) . Remove nozzles (28). Remove cover (5)
from front of housing (1).
9. Remove the brake spool (13) with items (14 through 20 and 22, 23, 24) from the valve.
Remove parts as an assembly by pulling spool (13) out front of housing (1).
10. Remove end cap (19) with the seals. Remove and discard the wiper seal (20) and the inner
(23) and outer (22) O-rings and discard them.
11. Remove the outer spool spring (24) and the spring spacer (17).
12. Remove the inner spring stop (16) and outer spring stop (18).
13. Remove inner spool spring (15) and the spring washer (14).
14. Pull the left and right pilot tubes (21) out of the valve housing (1). Remove and discard O-rings
(22 and 25) from pilot tubes (21).
15. Remove plugs or fittings (4) from top of housing (1). Remove the check ball body (6) and
check ball (7) from the valve housing (1), if necessary.
16. Inspect parts for excessive wear and replace if necessary. Metering spools (26) should slide
freely inside spool sleeves (30). Closely inspect the inside diameter of spool sleeves (30) for
nicks, scratches, etc. and replace if necessary.
17. Inspect the condition of the springs. If they are damaged or do not fall within specifications as
given in Paragraph 3 SPECIFICATIONS in this SECTION, they must be replaced.
Lower Steering Valve (Refer to Fig. 7E.34)
18. Remove the Hi-Lo valve (2) from the rear of the lower steering valve. Remove and discard the
gasket (10) between valve.
WARNING! Spring loaded assembly. Assembly must be held with tool to relieve
spring pressure. Use extreme care when disassembling.
19. Remove cover (3) from front of valve housing (1). Exert pressure on valve housing to
counteract spring tension.
20. Pull out the plugs (8) with outer O-rings (9) by pulling spools (4) out of the valve housing (1).
Discard the O-rings.
21. Remove items (4 thru 7) as an assembly by pulling spools (4) out front of valve housing (1).
22. Remove the spool springs (7).
23. Remove the spring spacer (6) and spring seats (5).