Toro Groundsmaster 455-D Service Manual page 115

5. Install trunnion seal cover (Item 35) with o-ring
(Item 18), seal (Item 34) and trunnion bearing into hous­
ing and over swashplate trunnion (see Trunnion Seal
Replacement). Wrap end of swashplate control shaft
with thin plastic to prevent damage to seal lip during
installation.
6. Install hex tapping screws (Item 16) and tighten to a
torque of 6 to 9 ft-lb.
7. Using caution to not damage the sealing surface,
press ball bearing (Item 27) onto drive shaft (Item 26).
Install bearing retaining ring (Item 28) onto shaft.
8. Install drive shaft and bearing into housing.
9. Install input shaft seal (Item 29), seal carrier (Item 30)
and o-ring (Item 31) as described in Traction Pump
Shaft Seal Replacement. Coat thrust plate (Item 37)
with petroleum jelly and install onto swashplate
(Item 36). The thrust plate is reversible.
10. Assemble cylinder block kit (Item 38) by installing
piston assemblies into the slipper guide. Lubricate pis­
tons and cylinder block bores. Install assembled guide
and pistons into cylinder block by inserting pistons into
cylinder block bores. The pistons and bores are not
selectively fitted, so no specific piston and bore orienta­
tion is required.
11. Lay the pump on its side and install cylinder block
kit into the housing.
12. Install valve plate locating pins (Item 40) into
end cap.
®
Groundsmaster 455-D
13. Coat back (steel side) of valve plate (Item 39) with
petroleum jelly to hold it in position and install valve plate
onto end cap (Item 1), with the bronze face visible. The
notch on the valve plate must engage the locating pin.
14. Install the two (2) alignment pins (Item 15) and install
new gasket (Item 14) onto end cap.
15. Assemble end cap (with valve plate installed onto
pump housing. When properly assembled, cylinder
block spring will hold end cap away from housing ap ­
proximately 1/8 in.
16. Install the four (4) screws (Item 25) and washers
(Item 24) that retain housing to end cap and evenly
tighten to a torque of 45 to 54 ft-lb.
IMPORTANT: Be sure all parts are properly aligned.
Do not force end cap into position on housing.
17. Rotate the pump shaft to make sure pump is assem­
bled correctly. When properly assembled, a maximum
torque of 7 ft-lb should be required to turn shaft.
18. Install coupling (Item 41) to output end of pump shaft
and secure in place with the pin (Item 43).
19. Assemble the following components as described in
previous procedures:
Charge Check / High Pressure Relief Valves
Charge Relief Valve
Page 4 - 35 Repairs