Traction Pump Shaft Seal Replacement (Fig. 17)
Figure 17
1. Park machine on a level surface, lower cutting units,
engage parking brake and stop the engine.
2. Remove pump assembly from machine.
3. Remove retaining ring (Item 32) from pump housing.
NOTE: It may be necessary to hold inward pressure
ag
ainst shaft to compress cylinder block spring while
removing retaining ring.
4. After removing retaining ring, seal carrier (Item 30)
wi
ll move out approximately 1/4 in. due to cylinder block
spring force on shaft. Lightly tap end of shaft with a soft
mallet until seal carrier can be removed from housing.
NOTE: After seal carrier is removed, the shaft and
be
aring assembly are free in the housing. Do not re-
move shaft unless unit is positioned with mounting
flange UP. If unit is positioned horizontally when shaft is
removed, the cylinder block could move out of place,
making shaft installation difficult.
5. Remove o-ring (Item 31) from seal carrier.
6. Put seal carrier in an arbor press and press out old
sea
l (Item 29). Use a properly sized pipe spacer or
socket wrench for a press tool. The seal cannot be used
again.
7. Inspect seal carrier, new seal and o-ring for damage.
Ins
pect sealing surface on shaft for rust, wear, or con-
tamination. Polish sealing area on shaft if necessary.
8. Use an arbor press to press new seal into seal carrier.
Be
careful not to damage seal.
NOTE: New seals are lubricated with an assembly
grease.
9. Use a seal protector tool or wrap end of shaft with thin
plastic to prevent damage to seal lip during installation.
10. Install o-ring into seal carrier and lubricate with
petroleum jelly.
11. Slide seal carrier assembly over shaft and into
ho
using bore. Hold inward pressure against shaft to
compress cylinder block spring while pressing seal car-
rier into position. Install retaining ring.
Repairs Pa
ge 4 - 28 Groundsmaster
®
455-D
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