Toro Workman 3000 Series, Service Manual

Page: 219 / 306

Disassembly (Fig. 23)
1. Remove shaft seal (see Shaft Seal Replacement).
IMPORTANT: Use caution when using a vise to
avoid distorting any pump components.
2. Secure flange end of pump in a vise with drive shaft
(Item 6) facing down.
3. Remove four (4) socket head cap screws (Item 18).
4. Put your hand on gear end housing (Item 17) and
gently tap housing with a soft face hammer to loosen
from stator (Item 8). Be careful not to drop any parts or
disengage gear mesh.
5. Before removing gears (Item 11), apply marking dye
to mating teeth to retain gear ”timing” and location when
reassembling.
6. Remove and discard the pressure plate seal (Item
15), back–up seal (Item 14) and wear plate seal (Item
21) as the pump is disassembled.
7. Press drive shaft and bearing assembly (Item 6, 22,
4) out of stator (Item 8). Remove crescent rings (Item 4)
and then remove bearing from drive shaft.
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
housing for excessive wear or scoring. Replace the
bearings if necessary. Replace wear plate (Item 10) if it
appears scored, then stone face of gears. Replace
gears (Item 11) if excessively worn or damaged.
4. Check bearing (Item 22) 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 23) and keyways in shafts for wear or damage.
Replace parts as necessary.
Assembly (Fig. 23)
1. Install one crescent ring (Item 4) on inside portion of
driveshaft (Item 6), then install bearing (Item 22) and
other crescent ring. Install driveshaft and bearing as-
sembly into stator (Item 8).
2. Apply Dexron III ATF to wear plate (Item 10) and
install on stator.
3. Install one crescent ring (Item 4) to idler shaft, then
install ball key (Item 23), gear (Item 11) and other cres-
cent ring. Make sure to maintain the original gear loca-
tion. Apply Dexron III ATF to gear and idler shaft
assembly, then install into stator.
4. Install shear pin (Item 7), then apply Dexron III ATF
to remaining gear and install to drive shaft (Item 6) main-
taining the original timing and locations.
5. Apply Dexron III ATF 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 Dexron III ATF to
seal plate (Item 9) and wear plate seal (Item 21), then
install. Assemble gear end housing (Item 17) to stator
(Item 8).
7. Install four (4) cap screws (Item 18) and tighten in a
crossing pattern from 9.5 to 12.5 ft–lb (13 to 17 N–m).
8. Install shaft seal (see Shaft Seal Replacement).
Hydraulic
System
Workman 3000/4000 Series Page 9 – 29 Hydraulic System