Toro Workman 3000 Series Service Manual page 383

Disassembly
1. Remove shaft seal (see Shaft Seal Replacement).
2. Remove relief valve (see Relief Valve Service).
3. Secure flange end of pump (Item 8) in a vise with
driveshaft (Item 6) facing down.
IMPORTANT: Use caution when using a vise to avoid
distorting any parts.
4. Remove four (4) socket head capscrews (Item 18).
5. Put you hand on gear end housing (Item 17) and gent­
ly tap housing with a soft face hammer to loosen from
stator (Item 8). Be careful not to drop any parts or disen­
gage gear mesh.
6. Before removing gears (Item 11), apply marking dye
to mating teeth to retain "timing" and location when reas­
sembling.
7. Remove and discard the pressure plate seal (Item
15), back–up seal (Item 14) and seal (Item 26) as the
pump is disassembled.
8. Press driveshaft and bearing assembly (Item 6, 27, 4)
out of stator (Item 8). Remove crescent rings (Item 4),
then remove bearing from driveshaft
Inspection
1. Wash all parts in cleaning solvent.
2. Check all parts for burrs, scoring, nicks, etc.
3. Check bearings (Item 12) in stator and gear end hous­
ing for excessive wear or scoring. Replace the assem­
blies as necessary. Replace wear plate (Item 10) if it
appears scored, then stone face of gears. Replace
gears if if excessively worn or damaged.
Workman 3000/4000 Series
4. Check bearing (Item 27) for smooth operation. Re­
place bearing if loose on shaft or noisy when rotated.
5. Inspect square key (Item 5), shear pin (Item 7), ball
key (Item 28) and keyways for wear or damage and re­
place parts as necessary.
Reassembly
1. Install one crescent ring (Item 4) on inside portion of
driveshaft (Item 6), then install bearing (Item 27) and
other crescent ring. Install driveshaft and bearing as­
sembly into stator (Item 8).
2. Apply oil to wear plate (Item 10) and install on stator.
3. Install one crescent ring (Item 4) to idler shaft, then
install ball key (Item 28), gear (Item 11) and other cres­
cent ring. Apply oil to gear and idler shaft assembly, then
install into stator.
4. Install shear pin (Item 7), then apply oil to other gear
and install to driveshaft (Item 6) maintaining the original
timing and locations.
5. Apply oil to pressure plate seal (Item 15), back–up
seal (Item 14) and pressure plate (Item 13), then install
into gear end housing.
6. Install dowel pins (Item 16). Apply oil to seal plate
(Item 9) and seal (Item 26), then install. Assemble gear
end housing (Item 17) to stator (Item 8). In capscrews
(Item 18) and tighten in a crossing pattern to 9.5 – 12.5
ft–lb (13 – 17 Nm).
7. Install relief valve (see Relief Valve Service).
8. Install shaft seal (see Shaft Seal Replacement).
Page 9 – 23 Hydraulic System