Toro Groundsmaster 7210, Service Manual

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Assembling the Polar Trac Hydraulic Control Valve (continued)
4. If a spool was disassembled, install the washer (item 14 in Figure 126 ), spool
spring, spacer, and retaining ring to the spool.
5. Slide the bushings (item 8 in Figure 126 ) and new O-rings over the spools.
6. Lubricate the spools with a thick layer of clean hydraulic fluid and carefully
install the spools into their proper bores.
7. Install the spool caps (item 10 in Figure 126 ) into the valve body; torque the
caps to 27 to 33 N∙m (20 to 25 ft-lb) .
8. Lubricate the detent plunger (item 2 in Figure 126 ) and plunger with a thick
layer of clean hydraulic fluid and install the plungers into their proper bores.
9. Install new O-rings, seats (item 5 in Figure 126 ), check poppet, and check
spring into the plunger bores.
10. Install the O-rings, back-up washers, and seat retaining plugs (items 7 and
15 in Figure 126 ) into their plunger bores; torque the plugs to 41 to 47 N∙m
(30 to 35 ft-lb) .
11. Install new O-ring, back-up washer, and solid plug (item 6 in Figure 126 )
into the bore with the detent plunger; torque the plug to 41 to 47 N∙m (30
to 35 ft-lb) .
12. Lubricate the detent plunger (item 22 in Figure 126 ), spring, and disc with a
thick layer of clean hydraulic fluid and install them into the valve body bore.
13. Install the O-ring and detent plug (item 19 in Figure 126 ) into the valve body;
torque the plug to 5.4 to 6.8 N∙m (4 to 5 ft-lb) .
Groundsmaster 7210 Page 4–123 Hydraulic System: Service and Repairs
16222SL Rev C