Rev. A
Groundsmaster 580-D
Page 4 - 40.1
PTO System Repairs
Deck Motor Repair (P/N 94-4907)
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Torque to 70 + 5ft-lbs
Mounting flange
Body
Drive Shaft
Gears
Mark before disassembling
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Figure 35A
1. Hex nut 4. Load plate 7. Load seal
2. Flat washer 5. O-ring seal 8. Square key
3. Shaft seal 6. Retaining ring * Seal Kit (Items 3, 5-8)
Disassembly
1. Use a marker or scribe to make a line across the body
and mounting flange for proper reassembly (put mark
along drive shaft side of body and flange as shown).
2. Remove key (8) from shaft.
3. Remove nuts (1) and washers (2).
4. Use a soft face hammer to lightly tap the mounting
flange to disengage it from the body. Slide the flange off
of the shaft.
5. Remove O-ring seal (5).
5. Remove retaining ring (6) and push the shaft seal (3)
squarely out of the mounting flange, taking care not to
damage any sealing surfaces.
NOTE: Before disassembling internal components,
mark the load plates for proper reassembly. Mark on an
area away from the seal location. Mark “F” for flange end
and “B” for body end.
6. With the motor lying on its side, hold the driveshaft
and pull it squarely out of the body bringing the load
plates (4) with it.
7. Remove the load plates (4) from the gears. Remove
the load seals (7) from the load plates.
Inspection and Repair
1. Wash each of the components with cleaning solvent
or mineral spirits and dry with a lint free cloth or com-
pressed air.
2. Body: Inspect the body bore cut-in where gears wipe
into the body. The cut-in should be bright and polished
in appearance with a depth of less than .08 mm. Replace
the motor if the surface is scored, has a matt appear-
ance or shows signs that the tip of the gears have dug
in and torn away the surface material. Inspect for dam-
age to port threads and body O-ring recesses.
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