Reassembly - Tennant ATLV 4300 Service Manual

Series 26 - Model 26000 Single Gear Pumps

Reassembly

General Information
It is important that the relationship of the backplate, body, wear
plate and front plate is correct. You will note two half moon
cavities in the body. Note: The smaller half moon port cavity
must be on the pressure side of the pump. The side of wear
plate with midsection cut out must be on suction side of pump.
Suction side of backplate is always side with larger port boss.
Reassembly
1 During the reassembly replace the wear plate, seal, back-up
gasket, shaft seal and o-rings as new parts.
2 Install o-ring in groove of front plate.
3 Apply a thin coat of petroleum jelly or hydraulic oil to both
milled gear pockets of body. Slip body onto front plate with half
moon port cavities in body facing away from front plate.
Note: The small half moon port cavity must be on the pressure
side (the plugged side of the front plate) of pump.
4 Install new seal and new backup gasket into wear plate.
Note in the middle of the backup gasket a flat section or
support. This area must face away from the wear plate inside
the seal.
5 Place new wear plate, seal, and backup gasket into gear
pocket with seal and backup gasket next to front plate. The side
of the wear plate with the mid section cut-away must be on the
suction side of pump.
6 Dip gear assemblies into oil and slip into front plate
bushings and gears into pockets of body.
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