Toro Groundsmaster 7210 Service Manual page 172

Assembling the Gear Pump (continued)
Hydraulic System: Service and Repairs
4. Lubricate and install the O-rings into the body.
5. Lubricate and install the pressure seals into the machined grooves of the
bearing blocks and carefully place the back-up rings into the grooves.
6. Lubricate the gear faces and bearing surfaces of the drive gear, idler gear,
and bearing blocks with clean hydraulic fluid.
7. Use the identification marks that you made during disassembly and carefully
assemble the bearing blocks and gears.
8. Position the pump body on its side.
9. Use the identification marks that you made during disassembly and carefully
slide the bearing block and gear assembly into the body cavity.
10. Remove excess lubrication from the mating surfaces of the body, back plate,
and front plate. Ensure that these surfaces are clean and dry.
11. Install the 2 dowel pins into the body.
Do not dislodge the O-rings, pressure seals, or back-up rings during
final assembly.
12. Use the marker lines for proper location, gently slide the back plate onto the
assembly, and engage the dowel pins with firm hand pressure.
13. Place a thin sleeve or tape on the pump shaft splines to prevent seal damage.
14. Position the pump with back plate downwards.
15. Use the marker lines for proper location and carefully slide the front plate
onto the assembly.
Note: Do not damage the seal during the front plate installation.
16. Remove the sleeve or tape from the shaft splines.
17. Install the 4 socket-head screws with the 4 lock washers and tighten them
by hand.
Clamping the pump body in a vise could damage the pump. When
you clamp the pump in a vise, clamp the mounting flange only.
18. Clamp the mounting flange of the pump in a vise with the shaft end down.
19. Alternately torque the 4 socket-head screws to 25 N∙m (220 in-lb).
20. If the implement relief valve was removed from the back plate, install the
relief valve to the back plate; torque the relief valve to 25 N∙m (220 in-lb).
21. Put a small amount of hydraulic fluid in the inlet port of the pump and rotate
the input shaft for 1 revolution. Place the coupler on the input shaft, use
pliers on the coupler and rotate the pump shaft. If the input shaft binds,
disassemble the pump and repeat the assembly process.
22. Remove the pump from the vise.
IMPORTANT
IMPORTANT
Page 4–112 Groundsmaster 7210
16222SL Rev C