Sundstrand Tandem Pump Repairs; Shaft Seal Replacement - Toro Reelmaster 335-D Service Manual

Sundstrand Tandem Pump Repairs

Shaft Seal Replacement

1. Retaining ring
2. O-ring
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 from pump housing.
NOTE: It may be necessary to hold inward pressure
against shaft to compress cylinder block spring while
removing retaining ring.
4. After removing retaining ring, seal carrier will 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
bearing 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 from seal carrier.
Sundstrand Tandem Pump Repairs
4
Figure 28
3. Seal carrier
6. Put seal carrier in an arbor press and press out old
seal. 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.
Inspect 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
housing bore. Hold inward pressure against shaft to
compress cylinder block spring while pressing seal car­
rier into position. Install retaining ring.
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4. Lip seal
Reelmaster
®
335-D