Toro Groundsmaster 455-D Service Manual page 117

10. Remove backup-up gasket (Item 12) from
front plate.
11. Remove bearing seal (Item 11) from front plate by
prying with a sharp tool.
12. Remove molded o-ring (Item 10) from front plate by
prying with a screwdriver.
13. Remove shaft seal (Item 5) from front plate by prying
with a screwdriver.
Disassembly of Back Plate Assembly (Flow Divider
/ Flow Control / Relief Valve)
1. Remove relief valve (Item 17) from back plate.
NOTE: Do not disassemble relief valve cartridge as­
sembly – it must be replaced as an assembly.
2. Remove hex plugs (Item 24, 18) flow divider spool
(Item 23), spring (Item 21) and disk (Item 20).
Inspect Auxiliary/Steering Pump Parts
GENERAL
1. Clean and dry all parts.
2. Remove all nicks and burrs from all parts with emery
cloth.
GEAR ASSEMBLY (Item 2, 3)
1. Check drive shaft spline for twisted or broken teeth.
2. Inspect both drive gear and idler gear shafts at
bushing points and seal area for rough surfaces and
excessive wear.
3. If shaft measures less than 0.748" in bushing area,
the gear assembly should be replaced (one gear as ­
sembly may be replaced separately; shafts and gears
are available as assemblies only).
4. Inspect gear face for scoring and excessive wear.
®
Groundsmaster 455-D
5. If gear width is less than 0.636", the gear assembly
should be replaced.
6. Be sure snap rings are in grooves on either side of
drive and idler gears.
7. If edge of gear teeth are sharp, break edge with emery
cloth.
FRONT PLATE (Item 7) AND BACK PLATE (Item 22)
1. Oil groove in bushings in both front plate and back
plate should be in line with dowel pin holes and 180
apart.
2. If I.D. of bushings in front plate or back plate exceed
0.755", front or back plate should be replaced (bushings
are not available separately).
3. Bushings in front plate should be flush with face of
front plate.
4. Check for scoring on face of back plate. If wear
exceeds 0.0015", back plate should be replaced.
BODY (Item 14)
1. Check inside gear pockets for excessive scoring or
wear.
2. Body should be replaced if I.D. of gear pocket ex­
ceeds 1.713".
FLOW DIVIDER / FLOW CONTROL / RELIEF VALVE
1. Check disk (Item 20) for wear.
2. Check spring (Item 21) for weakness or breakage.
3. Wash back plate in clean solvent, then direct com­
pressed air into relief valve and flow divider cavities in
back plate to remove any contamination.
Page 4 - 37 Repairs