Toro Multi Pro 1200 Service Manual page 60

Steering Pump Service
1
2
3
4
24
23
1. Retaining ring
2. Shaft seal
3. Spacer
4. Ball bearing
5. Check ball
6. Spring
7. Spring
8. Adjusting screw
Before performing any service on gear pump, plug
ports, wash exterior of pump with cleaning solvent and
dry pump thoroughly.
Relief Valve Service (Fig. 21)
1. Remove cap (item 10). Remove and discard gasket
(item 9) from cap.
NOTE: Count number of turns it takes to unthread ad-
justing screw so it can be reinstalled for the same
approximate relief pressure setting.
2. Remove adjusting screw (item 8), springs (items 6
and 7) and check ball (item 5).
3. Inspect check ball for burrs or roughness. Inspect re-
lief valve bore and seat inside pump stator (item 24). In-
spect springs for damage. Replace any worn or
damaged parts.
Hydraulic System
7
6
5
14
22
21
9. Gasket
10. Cap
11. Key
12. Crescent ring (4 used)
13. Woodruff key
14. Drive shaft
15. Needle bearing (4 used)
16. Plug
8
10
9
11
13
12
12
15
12
20
19
15
18
Figure 21
4. Clean and dry relief valve parts. Apply clean Dexron
III ATF to valve parts.
NOTE: Install adjusting screw same number of turns as
counted during removal for the same approximate relief
pressure setting.
5. Install check ball (item 5), springs (item 6 and 7) and
adjusting screw (item 8). Position small end of springs
against check ball.
6. Install new gasket (item 9) and cap (item 10). Torque
cap from 144 to 180 in- -lb (16 to 20 N- -m).
7. Check pump relief pressure (see Steering Pump
Flow and Relief Pressure in the Testing section of this
chapter). If adjustment is needed, tighten adjusting
screw to increase relief pressure or loosen adjusting
screw to reduce relief pressure.
Page 4 - - 24
144 to 180 in- -lb
(16 to 20 N- -m)
114 to 150 in- -lb
(13 to 17 N- -m)
16
17
17. Screw (8 used)
18. Gear housing
19. Idler gear
20. Drive gear
21. Idler shaft
22. Gasket
23. Dowel pin (2 used)
24. Stator
Multi Pro 1200/1250