Terex TS14G, Maintenance Manual

Page: 192 / 376

Steering System - Steering Valve
Section 220-0090
SM 1765 2-99
6
10. Fully depress spool (47) at nut end, until it
bottoms, check dimension B as shown in Fig. 3. If
dimension B is 31.2 mm (1.23 inch), for example, the
thickness taken by shims B, Fig. 3, must be reduced
by 0.51 mm (0.020 inch) to obtain the correct 31.8 mm
(1.25 inch) dimension. If dimension B exceeds
31.8 mm (1.25 inch), the thickness taken by shims B
must be increased. Shims B, Fig. 3, are available in
0.050, 0.13, 0.25, 0.50 and 0.64 mm (0.002, 0.0051,
0.0101, 0.020 and 0.025 inch) sizes. Do not use a
shim A in place of a shim B.
11. Line up the cap screw holes in shims, plate and
valve body (6). Install new plug (52) into cover (9) over
end of spool (47) and secure to valve body (6) with
four cap screws (53) and lockwashers (16). Torque
tighten cap screws (53) to 40 - 50 Nm (30 - 40 lbf ft),
lubricated.
12. Fully depress spool (47) into cover (9) and check
dimension A as shown in Fig. 3. If, for example,
dimension A is 19.6 mm (0.77 inch), the thickness
taken by shims A, Fig. 3, must be increased by
0.50 mm (0.02 inch) to obtain the correct 19.1 mm
(0.75 inch) dimension. If dimension A is less than
19.1 mm (0.75 inch), the thickness taken by shims A
must be reduced. Shims A, Fig. 3, are available in
0.05, 0.13 and 0.25 mm (0.002, 0.005 and 0.010 inch)
sizes. Do not use a shim B in place of a shim A.
13. Check the dimension shown in Fig. 3 with spool in
‘Neutral and Hold’ position. If the 25.4 mm (1.00 inch)
dimension is not obtained, re-check dimensions A and
B, Fig. 3, and adjust as required.
14. Install wiper (48) over link bar end of spool (47)
and into groove in valve body (6). Secure wiper with
plate (49) and two bolts (51) and lockwashers (50).
15. Place new ‘O’ ring (7) on plug (8) and thread plug
into valve body (6) until it bottoms.
16. Install new ‘O’ rings (2 & 3) on seat (1).
17. Place one spring (5) in bore on side of valve body
(6), followed by cross-over relief valve (4) assembly
and seat (1). Screw seat (1) into valve body (6) until it
bottoms against housing. Repeat this step for other
cross-over relief valve (4) assembly in opposite side of
valve body (6).
18. Using a soft metal rod with a diameter of 12.7 mm
(0.50 inch), press or tap seat (32) into bore of valve
body (6).
19. Install new ‘O’ ring (35) on cap (36). Position
spring (34) in opening of cap (36) and check (33) in
spring (34) and into cap (36). Install check and cap
assembly into valve body (6). Make sure check is in
proper position on seat (32) and secure cap to valve
body (6).
20. Insert check (31) into opposite side of valve body
(6) and against seat (32) in housing. Install spring (30)
in open end of check (31) in valve body (6).
21. Install new ‘O’ ring (29) on seat (28). Insert seat
into valve body (6) against spring (30). Make sure
spring is positioned in embossment on inner face of
seat.
22. Install new ‘O’ ring (25) on cap (24). Thread
adjusting screw (23) through cap (24). Position spring
(26) and poppet (27) on boss end of adjusting screw
and install cap (24) in valve body (6). Make sure
poppet (27) is guided into seating surface of seat (28).
Thread cap into valve body (6) until it bottoms on
housing.
23. Install one washer (22), jam nut (21), second
washer (22) and nut (20) on adjusting screw (23). Do
not tighten nut (20) until relief valve adjustment is set.
SM - 2151
Fig. 3 - Adjusting Spool Travel
SPACER
COVER
SPRING
NUT
WASHERS
SHIM A
PLATE
SHIM B
A 0.75” (19.1mm)
NEUTRAL & HOLD - 1.00” (25.4mm)
B 1.25” (31.8mm)
A B
Courtesy of Machine.Market